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[Java教程]JAVA理解逻辑程序的书上全部重要的习题


今天随便翻翻看以前学过JAVA理解逻辑程序的书上全部练习,为了一些刚学的学弟学妹,所以呢就把这些作为共享了.

希望对初学的学弟学妹有所帮助!

  1 例子:升级“我行我素购物管理系统”,实现购物结算功能  2 代码:  3   4 public class OneDay {  5   public static void main(String[] args) {  6     int shirtPrice=245;  7     int shoePrice=570;  8     int pADpRICE=320;  9     int ShoeNo=1; 10     int shirtNo=2; 11     int padNo=1; 12     double discount=0.8; 13     /* 14      * 计算消费总金额 15      *  16      * */ 17     double finalPay=(shirtPrice*shirtNo+    shoePrice*ShoeNo+shoePrice+pADpRICE*padNo)*discount; 18     System.out.println("消费总金额:"+finalPay); 19   } 20 } 21  22   23 例子:升级“我行我素购物管理系统”,实现打印购物小票和计算积分功能 24 public class OneDay { 25   public static void main(String[] args) { 26     int shirtPrice=245; 27     int shoePrice=570; 28     int pADpRICE=320; 29     int ShoeNo=1; 30     int shirtNo=2; 31     int padNo=1; 32     double discount=0.8; 33     double finalPay=(shirtPrice*shirtNo+shoePrice*ShoeNo+shoePrice+pADpRICE*padNo)*discount; 34     double Sum=1800; 35     double SuM=Sum-finalPay; 36     //积分 37     int Point=(int)finalPay*3/100; 38   System.out.println("**********消费单***********"); 39   System.out.println("购买物品\t单价\t个数\t金额"); 40   System.out.println("T血\t¥245\t2\t¥490"); 41   System.out.println("网球鞋\t¥570\t1\t¥570"); 42   System.out.println("网球拍\t¥320\t1\t¥320\n"); 43   System.out.println("折扣:\t"+discount); 44   System.out.println("消费总金额:"+finalPay); 45   System.out.println("实际交费\t¥"+Sum); 46   System.out.println("找钱\t¥"+SuM); 47   System.out.println("积分\t¥"+Point); 48   } 49 } 50   51 //我行我素,幸运抽奖 52 public class OneDay { 53   public static void main(String[] args) { 54     int cusNO;//客户会员号 55     System.out.println("请输入四位会员卡号:"); 56     Scanner input=new Scanner(System.in);//导包 57     cusNO=input.nextInt(); 58     //获得 每位数字 59     int gewei=cusNO%10; 60     int shiwei=cusNO%10%10; 61     int baiwei=cusNO/100%10; 62     int qianwei=cusNO/1000; 63     int sum=gewei+shiwei+baiwei+qianwei; 64     System.out.println("会员卡号:"+cusNO+"各位之和:"+sum); 65     boolean isluck=sum>20;//boolean的判断为true或false 66     System.out.println("是幸运客户吗?"+isluck); 67   } 68 } 69  70   71 //我行我素,判断商品判断商品折扣价格 72   public static void main(String[] args) { 73     int shirtPrice=245; 74     int shoePrice=570; 75     int padPrice=320; 76     //用户输入折扣 77     Scanner input=new Scanner(System.in); 78     System.out.println("请输入折扣:"); 79     double discount=input.nextDouble(); 80     //计算商品的享受价格 81     double shirtPriceDis=shirtPrice*discount; 82     double shoePriceDis=shoePrice*discount; 83     double padPriceDis=padPrice*discount; 84     //判断商品价格是否低于100 85     boolean shirtPricebool=shirtPriceDis<100; 86     boolean shoePricebool=shoePriceDis<100; 87     boolean padPricebool=padPriceDis<100; 88     System.out.println("T血折扣低于100吗?"+shirtPricebool); 89     System.out.println("网球鞋折扣低于100吗?"+shoePricebool); 90     System.out.println("网球拍折扣低于100吗?"+padPricebool); 91      92       93 小明左右手分别拿出两张牌 94 public static void main(String[] args) { 95   int num; 96   int num1; 97   System.out.println("输出互换前手中的纸牌 :"); 98    99     Scanner input=new Scanner(System.in); 100     System.out.println("左手中的纸牌:\n"); 101     num=input.nextInt(); 102     System.out.println("输出右手的纸牌:"); 103       num1=input.nextInt(); 104       System.out.println("**************************************"); 105       System.out.println("输出互换后手中的纸牌 :"); 106       int temp; 107       temp=num; 108       num=num1;//20 109       num1=temp;//10 110       System.out.println("左手中的纸牌:"+num); 111       System.out.println("输出右手的纸牌:"+num1); 112   } 113 } 114  115   116 double sheshi=0; 117       int num=0;//循环次始值 118       double huashi; 119       do{ 120         num++; 121         sheshi+=20; 122         huashi=sheshi*9/5+32; 123         System.out.println("摄氏温度:"+sheshi+"度,华氏温度:"+huashi+"度"); 124       }while(num<=9);//循环次条件 125       System.out.println("结束"); 126    127   128 public static void main(String[] args) {  129     Scanner input=new Scanner(System.in); 130     /* 131      * 产生随机数 132      * */ 133     int random=(int)(Math.random()*10); 134     System.out.println("************购物系统抽奖************\n"); 135     System.out.println("请输入4位会员号:"); 136     int cusNo=input.nextInt(); 137     /* 138      * 获得百分位 139      * */ 140     int baiwei=cusNo/100%10; 141     /* 142      * 判断该会员是否是幸运会员 143      * */ 144     if (baiwei==random)      145       System.out.println(cusNo+"是幸运客户,获得笔记本一个"); 146        147     }else { 148       System.out.println(cusNo+"号客户"+"谢谢"); 149     } 150   }  151 public static void main(String[] args) { 152      153     Scanner input=new Scanner(System.in); 154     System.out.println("请输入第一个整数"); 155     int a=input.nextInt(); 156     System.out.println("请输入第二个整数"); 157     int b=input.nextInt(); 158     System.out.println("请输入第三个整数"); 159     int c=input.nextInt(); 160     /*第一道排序*/ 161     System.out.println("第一道排序"); 162     if (a<b&&a<c) { 163       System.out.print(a); 164       System.out.print(b); 165       System.out.println(c); 166     } 167     /*第二道排序*/ 168     System.out.println("第二道排序"); 169     if (b<c) { 170       System.out.print(a); 171       System.out.print(b); 172       System.out.println(c); 173     } 174     System.out.println("每个变量的值"); 175       System.out.println(a); 176       System.out.println(b); 177       System.out.println(c); 178   }  179   public static void main(String[] args) { 180     int price = 5000; // 机票的原价 181     int month; // 出行的月份 182     int type;  // 头等舱为1,经济舱为2 183     Scanner input = new Scanner(System.in); 184     System.out.println("请输入您出行的月份:1~12"); 185     month = input.nextInt(); 186     System.out.println("请问您选择头等舱还是经济舱?头等舱输入1,经济舱输入2"); 187     type = input.nextInt(); 188      189     switch(month/10){ 190       case 1: 191       case 2: 192       case 3: 193         if (type == 1) // 头等舱 194           { 195             System.out.println("您的机票价格为:"+ price * 0.6); 196           } 197           else if (type == 2) // 经济舱 198           { 199             System.out.println("您的机票价格为:"+ price * 0.3); 200           }         201         break; 202       case 0: 203       case 4: 204       case 5: 205       case 6: 206       case 7: 207       case 8: 208       case 9: 209         if (type == 1) // 头等舱 210           { 211             System.out.println("您的机票价格为:"+price * 0.9); 212           } 213           else if (type == 2) // 经济舱 214           { 215             System.out.println("您的机票价格为:"+ price * 0.8); 216           }         217         break; 218       default: 219         System.out.println("请正确输入成绩!"); 220         break; 221     } 222      223      224 public static void main(String[] args) { 225   Scanner input=new Scanner(System.in); 226   System.out.println("*******************计算器****************"); 227   int result=0; 228   char opt='*';  //定义操作符 229   System.out.println("请输入第一个操作数:"); 230   if (input.hasNextInt() == true) { 231     int num1 = input.nextInt(); 232     System.out.println("请输入第二个操作数:"); 233     if (input.hasNextInt() == true) { 234       int num2 = input.nextInt(); 235       switch (opt) { 236       case '+': 237         result=num1+num2; 238         break; 239       case '-': 240         result=num1-num2; 241         break; 242       case '*': 243         result=num1*num2; 244         break; 245       case '/': 246         result=num1/num2; 247         break; 248       default: 249         System.out.println("输入错误。"); 250         break; 251       } 252       System.out.println("计算结果:"+num1+""+opt+num2+"="+result); 253     }else { 254       System.out.println("请输入正确的数字!"); 255     } 256   } else { 257     System.out.println("请输入正确的数字!"); 258   }  259 public static void main(String[] args) { 260   Scanner input=new Scanner(System.in); 261   System.out.println("*******************系统*************"); 262   System.out.println("1.进入"); 263   System.out.println("2.退出"); 264   System.out.println("请输入数字"); 265   /* 266    * 通过调用Scanner对象的hasNextInt(),来判断输入的数字是否合法 267    * */ 268   if (input.hasNextInt()==true) { 269     int num=input.nextInt(); 270     switch (num) { 271     case 1:   272       System.out.println("don't go"); 273       break; 274   case 2:     275     System.out.println("let go"); 276       break; 277     default: 278       System.out.println("错误"); 279       break; 280     } 281   } 282    283 public static void main(String[] args) { 284     //方法一: 285     /*100以内的偶数之和 286      * */ 287   int num=0; 288   int sum=0; 289   while (num<=100) { 290     if (num%2==0) { 291       sum+=num; 292     } 293     num++; 294   } 295       System.out.println(sum); 296       //方法二: 297       while (num<=100) {       298           sum+=num;         299          num+=2; 300       } 301           System.out.println(sum); 302          303            304    }  305 public static void main(String[] args) { 306     Scanner input=new Scanner(System.in); 307     System.out.println("请选择编号:\n 1.T血,2.网球鞋,3.网球拍"); 308    309      310     double price=0.0; 311     String name=""; 312     int goodsno=0; 313     String answer="y"; 314     while ("y".equals(answer)) { 315       System.out.println("请输入编号:"); 316       goodsno=input.nextInt(); 317       switch (goodsno) { 318       case 1: 319         name="djs"; 320         price=245.0; 321         break; 322       case 2: 323         name="fd"; 324         price=570.0; 325         break; 326       case 3: 327         name="res"; 328         price=320.0; 329         break; 330       default: 331         break; 332       } 333       System.out.println(name+"\t"+"¥"+price+"\t"); 334       System.out.println("是否继续?(y/n)"); 335       answer=input.next(); 336     } 337     System.out.println("程序结束"); 338   }  339 public static void main(String[] args) { 340     //01.列出商品清单 341         System.out.println("1.T恤 2.网球鞋 3.网球拍"); 342         //02.肯定要用到循环 343         String answer=""; 344         //定义折扣 345         double discount=0.8; 346         //保存总金额 347         double money=0; 348         Scanner input=new Scanner(System.in); 349          350         do{ 351           System.out.println("请输入商品编号"); 352            353           int proNo=input.nextInt(); 354           System.out.println("请输入商品数量"); 355           int proNum=input.nextInt(); 356           String proName=""; 357           double proPrice=0; 358           switch (proNo) { 359           case 1: 360             //列出第一个商品的信息 361             //名称 362             proName="T恤"; 363             //价格 364             proPrice=25; 365             break; 366           case 2: 367             proName="网球鞋"; 368             proPrice=260; 369             break; 370           case 3: 371             proName="网球拍"; 372             proPrice=200; 373             break; 374           default: 375             break; 376           } 377           //03.输出当前所购买商品的详情 378           double sum=proPrice*proNum; 379           money=money+sum; 380           System.out.println(proName+"\t¥"+proPrice+"\t数量"+proNum+"\t小计"+sum); 381           System.out.println("是否继续?(y/n)"); 382           answer=input.next(); 383         }while(answer.equals("y")); 384         //出了循环,意味着用户要结账,离开商店 385         System.out.println("折扣:"+discount); 386         //应付金额 387         double yingfuMoney=money*discount; 388         System.out.println("应付金额:"+yingfuMoney); 389         System.out.println("请输入您的支付金额:"); 390         int userMoney=input.nextInt(); 391         //找零 392         double lastMoney=userMoney-yingfuMoney; 393         //最好判定一下 394         if (userMoney>=yingfuMoney) { 395           System.out.println("找零"+lastMoney); 396         }  397  398       //用户录入一堆数字,拎出最大和最小值 399     Scanner input=new Scanner(System.in); 400     System.out.println("爷爷,请您输入一个数字呗"); 401     int num=input.nextInt(); 402     //最大值 403     int max=num; 404     //最小值 405     int min=num; 406     while(num!=0){ 407       if(num>max){ 408         max=num; 409       } 410       if(num<min){ 411         min=num; 412       } 413       System.out.println("爷爷,请您输入一个数字呗"); 414       num=input.nextInt(); 415     } 416     System.out.println("最大值是"+max+"\t最小值是"+min); 417          418  419  420  421 public static void main(String[] args) { 422       Scanner input=new Scanner(System.in); 423   int cource=0; 424     int number=0;//班级总人数 425      int sum=0;//大于80分的人数 426      System.out.println("总人数:"); 427     number =input.nextInt(); 428     for (int i =0; i <number; i++) { 429       System.out.println("输入第"+(i+1)+"位成绩"); 430       cource=input.nextInt(); 431       if (cource<80) { 432         continue; 433       } 434       sum++; 435     } 436     System.out.println("80分以上的人数"+sum); 437     double rate=(double)sum/number*100; 438     System.out.println("比例:"+rate+"%"); 439   }     440  441 public static void main(String[] args) { 442       Scanner input=new Scanner(System.in); 443     int sum=0; 444     int coure=0; 445     int avg=0; 446     boolean isnegi=false; 447     //Scanner input=new Scanner(System.in); 448     for (int i =0; i <5; i++) {   449       System.out.println("请输入5门课程的"+(i+1)+"门课的成绩:"); 450       coure=input.nextInt(); 451       if (coure<0) { 452         isnegi=true; 453         break; 454       } 455       sum+=coure; 456     } 457     if (isnegi) { 458       System.out.println("成绩输入错误"); 459     }else { 460       avg=sum/5; 461       System.out.println("总成绩:"+sum); 462       System.out.println("平均成绩:"+avg); 463     } 464  465    466 public static void main(String[] args) { 467       Scanner input=new Scanner(System.in); 468 int pwd=123456;//密码 469     String name="jim";//户名s     470     for (int i = 0; i <3; i++) { 471       System.out.println("请输入用户名:"); 472       String Rname=input.next(); 473       System.out.println("请输入密码:"); 474       int Rpwd=input.nextInt(); 475       if (Rname.equals(name)&&Rpwd==pwd) { 476         System.out.println("欢迎登陆系统"); 477          478       }else { 479         System.out.println("输入错误!您还有"+(3-(i+1))+"次机会"); 480         System.out.println("对不起!"+((i+1))+"次错误!"); 481         continue; 482          483       }     484     }  485     int rabbit;//兔子 486     int chicken;//小鸡 487     for(rabbit=1;rabbit<14;rabbit++){ 488      chicken=35-rabbit; 489      if((rabbit*4+chicken*2)==94) 490      System.out.println("兔子:"+rabbit+"\t小鸡:"+chicken);     491      } 492  493   494 for (int i = 1; i <=100; i++) { 495        496       if (i%3==0) { 497         System.out.println("Flip"); 498       } 499         else { 500           System.out.println(i); 501         } 502       if (i%5==0) { 503         System.out.println("Flop"); 504       } 505         else { 506           System.out.println(i); 507         } 508     if (i%3==0&&i%5==0) { 509         System.out.println("FlipFlop"); 510       }else { 511         System.out.println(i); 512       } 513     } 514  515   516 int men; 517     int women; 518     for( men=0;men<=10;men++){ 519       for( women=0;women<=30;women++){ 520         if(30-men-women >= 0){ 521           int count = 3*men + 2*women + 1*(30-men-women) ; 522           if(count == 50){ 523             System.out.println("男人:" + men+",女人:"+women+",小孩:" +(30-men-women)) ; 524           } 525         } 526       } 527     } 528  529   530 public static void main(String[] args) { 531     Scanner input=new Scanner(System.in);   532     /* 533      *选择游戏 534      *  535      * */ 536     System.out.println("欢迎进入青鸟迷你戏平台"); 537     System.out.println(""); 538     System.out.println("请选择你喜爱的游戏"); 539     System.out.println("----------------------------"); 540     System.out.println("1.斗地主"); 541     System.out.println("2.斗牛"); 542     System.out.println("3.泡泡龙"); 543     System.out.println("4.连连看"); 544     System.out.println("-----------------------------"); 545     System.out.println("请选择,输入数字:"); 546     int num = input.nextInt(); 547     switch (num) { 548     case 1: 549       System.out.println("您已进入斗地主房间!"); 550       break; 551     case 2: 552       System.out.println("您已进入斗牛房间!"); 553       break; 554     case 3: 555       System.out.println("您已进入泡泡龙房间!"); 556       break; 557     case 4: 558       System.out.println("您已进入连连看房间!"); 559       break; 560     } 561         /* 562          * 玩游戏升级 563          *  564          * */ 565     int score = 0; 566     int Num = 1; 567     String answer; 568     do { 569       System.out.println("您正在玩" + Num + "局,输入您的成绩为:"); 570       score = input.nextInt(); 571       if (score > 80) { 572       } 573       Num++; 574       if (Num > 5) { 575         System.out.println("游戏结束!!"); 576         System.out.println("恭喜你,通过一级"); 577  578       } else { 579         System.out.println("继续玩下一局吗?(yes/no)"); 580         answer = input.next(); 581         if (answer.equals("no")) { 582           System.out.println("您已中途退出游戏"); 583           System.out.println("对不起,您未能晋级,继续加油呀!"); 584           break; 585         } else { 586           System.out.println("进入下一局"); 587         } 588       } 589     } while (Num <= 5); 590      591     /*玩游戏并支付游戏币 592      *  593      * */ 594     int money; 595     double discount1 = 0.5; 596     double discount2 = 0.8; 597     int m1 = 10; 598     int m2 = 20; 599     System.out.println("请您选择玩的游戏类型:"); 600     System.out.println("1.牌类"); 601     System.out.println("2.休闲竞技类"); 602     int num1 = input.nextInt(); 603     System.out.println("请您输入游戏时长:"); 604     int time = input.nextInt(); 605     switch (num1) { 606     case 1: 607       if (time > 10) { 608         System.out.println("您玩的是牌类游戏,时长是:" + time + "小时,可以享受5折优惠"); 609         money = (int) (time * m1 * discount1); 610         System.out.println("您需支付" + money + "个游戏币"); 611  612       } else { 613         System.out.println("您玩的是牌类类游戏,时长是:" + time + "小时,可以享受8折优惠"); 614         money = (int) (time * m1 * discount2); 615         System.out.println("您需支付" + money + "个游戏币"); 616       } 617       break; 618     case 2: 619       if (time > 10) { 620         System.out.println("您玩的是休闲类游戏,时长是:" + time + "小时,可以享受5折优惠"); 621         money = (int) (time * m2 * discount1); 622         System.out.println("您需支付" + money + "个游戏币"); 623  624       } else { 625         System.out.println("您玩的是休闲类游戏,时长是:" + time + "小时,可以享受8折优惠"); 626         money = (int) (time * m2 * discount2); 627         System.out.println("您需支付" + money + "个游戏币"); 628       } 629       break; 630     } 631     /*统计游戏点击率 632      *  633      * */ 634     int j = 0; 635     int num2 =0; 636     for (int i = 1; i <= 4; i++) { 637       System.out.println("请输入第" + i + "个游戏的点击率:"); 638       num2 = input.nextInt(); 639       if (num2 <= 100) { 640         continue; 641       } 642       j++; 643     } 644     System.out.println("点击率大于100的游戏数是:" + j); 645     double rate = (double)j/ 4 * 100; 646     System.out.println("点击率大于100的游戏所占的比例是:" + rate + "%"); 647     /*添加用户信息 648      *  649      * */ 650     int a=0,age=0,b=0; 651     System.out.println("请输入要登录用户的数量:"); 652     int num3=input.nextInt(); 653     for (int i=0;i<num3;i++){ 654       System.out.println("请输入用户编号<4位整数>:"); 655       a=input.nextInt(); 656       System.out.println("请输入用户年龄:"); 657       age=input.nextInt(); 658       System.out.println("请输入用户积分:"); 659       b=input.nextInt(); 660       if(age<10){ 661         System.out.println("很抱歉,你年龄不适合玩游戏\n录入失败"); 662       }else{ 663       System.out.println("您输入的会员信息是:"); 664         System.out.println("用户编号"+a+"\t用户年龄"+age+"\t用户积分"+b); 665     } 666     } 667  668   } 669    670 public static void main(String[] args) {       671      672     Scanner input=new Scanner(System.in); 673 System.out.println("请输入整数:"); 674     int in=input.nextInt(); 675     int result=1; 676     System.out.print(in+"!="); 677     for (int i = 1; i<=in; i++) { 678             System.out.print(i); 679       if (i<in) { 680         System.out.print("*"); 681          682       } 683       result=result*i; 684        685     } 686     System.out.print("="+result); 687     } 688  689  690  691  692 public static void main(String[] args) {         693     Scanner input=new Scanner(System.in); 694     int num = 0; //个数 695     int sum = 0; //和 696     for(int i = 0;i <= 100;i ++) {  697     if(i % 7!= 0) {  698     num ++;  699     sum = sum+i;  700     System.out.print(i + "\t");  701     if(num % 4 == 0)  702     System.out.println();  703     }      704     }  705     System.out.println();  706     System.out.println("总和为:"+sum); 707      708     709     Scanner input=new Scanner(System.in); 710      711     int scores []=new int[5]; 712     int sum=0; 713      714     System.out.println("请输入五位同学的成绩:"); 715     for (int i = 0; i < scores.length; i++) { 716       scores[i]=input.nextInt(); 717       sum+=scores[i];//成绩累加     718     } 719     System.out.print("平均分:"+sum/scores.length); 720      721  722  723 int scores []=new int[]{90,80,100,95,90}; 724     System.out.println("请修改第三位同学的成绩为98:"); 725     scores[2]=98;//数组下标 726     System.out.println("修改后,五位同学的成绩:"); 727     for (int i = 0; i < scores.length; i++) { 728       System.out.print(scores[i]+" "); 729     } 730   731  732 public static void main(String[] args) {         733     Scanner input=new Scanner(System.in); 734     double sum=0; 735     double scores[]=new double[5]; 736     for (int i = 0; i < scores.length; i++) { 737       System.out.print("请输入第"+(i+1)+"笔金额的记录:"); 738       scores[i]=input.nextDouble(); 739       sum+=scores[i]; 740     } 741     System.out.println("序号\t\t"+"金额(元)"); 742     for (int i = 0; i < scores.length; i++) { 743       System.out.print((i+1)+"\t\t"); 744     System.out.println(scores[i]); 745     } 746       System.out.println("总金额:\t\t"+sum); 747  748   749   public static void main(String[] args) {     750   Scanner input=new Scanner(System.in); 751   int scores []=new int[5]; 752   System.out.println("请输入5位同学的成绩:"); 753   //录入成绩 754   for (int i = 0; i < scores.length; i++) { 755     scores[i]=input.nextInt(); 756   } 757   Arrays.sort(scores);//排序 758   System.out.println("学员成绩按升序排序:"); 759   for (int i = 0; i < scores.length; i++) { 760     System.out.println(scores [i]+" "); 761   } 762  763  764 public static void main(String[] args) {     765   Scanner input=new Scanner(System.in); 766   int scores []=new int[5]; 767   int max=0; 768   System.out.println("请输入5位同学的成绩:"); 769   //录入成绩 770   for (int i = 0; i < scores.length; i++) { 771     scores[i]=input.nextInt(); 772   } 773    774   for (int i = 0; i < scores.length; i++) { 775     if (scores[i]>max) { 776       max=scores[i]; 777     } 778   } 779     System.out.println("最高分:"+max); 780   } 781   782 public static void main(String[] args) {     783   Scanner input=new Scanner(System.in); 784      int [] list=new int [6]; 785      list[0]=99; 786      list[1]=95; 787      list[2]=92; 788      list[3]=89; 789      list[4]=69; 790      list[5]=49; 791      int index=list.length;//保存新增成绩的位置 792      System.out.println("请输入新增成绩:"); 793      int num=input.nextInt();//输入要插入的数据 794      //找到新元素插入的位置 795      for (int i = 0; i < list.length; i++) { 796        797        if (num>list[i]) { 798         index=i; 799         break; 800       } 801     } 802      //元素后移 803      for (int i =list.length-1 ; i >index ; i--) { 804     list[i]=list[i-1];//index下标开始的元素后移一个位置 805     } 806      list[index]=num; 807   System.out.println("插入成绩的下标:"+index); 808    809   System.out.println("插入后成绩信息是:"); 810   for (int i = 0; i < list.length; i++) { 811     System.out.println(list[i]+"\t"); 812   } 813   } 814   815 public static void main(String[] args) {     816   Scanner input=new Scanner(System.in); 817   String[]num=new String[]{"a","c","u","b","e","p","f","z"}; 818   System.out.print("原字符序列:"); 819   for (int i = 0; i < num.length; i++) { 820     System.out.print(num[i]+" "); 821   } 822   Arrays.sort(num); 823   System.out.println();//换行 824   System.out.print("升序排序后:"); 825   for (int i = 0; i < num.length; i++) { 826     System.out.print(num[i]+" "); 827   } 828   System.out.println();//换行 829   System.out.print("逆序输出为:"); 830   //逆序,则从最后的哪一个元素排在第一位 831   for (int i = num.length-1; i >=0 ; i--) { 832     System.out.print(num[i]+" "); 833   }  834  835 Scanner input=new Scanner(System.in); 836   String[]num=new String[]{"a","c","u","b","e","p","f","z"}; 837   System.out.print("原字符序列:"); 838   for (int i = 0; i < num.length; i++) { 839     System.out.print(num[i]+" "); 840   } 841   Arrays.sort(num); 842   System.out.println();//换行 843   System.out.print("升序排序后:"); 844   for (int i = 0; i < num.length; i++) { 845     System.out.print(num[i]+" "); 846   } 847   System.out.println();//换行 848   System.out.print("逆序输出为:"); 849   //逆序,则从最后的哪一个元素排在第一位 850   for (int i = num.length-1; i >=0 ; i--) { 851     System.out.print(num[i]+" "); 852   } 853  int index=num.length;//待插入的字符的位置 854  System.out.println(); 855  System.out.print("待插入的字符:");  856  String way=input.next();//输入要插入的位置 857  //找到要插入字符的位置 858  for (int i = 0; i < num.length; i++) { 859   if (way.equalsIgnoreCase(num[i])) { 860     index=i; 861     break; 862   } 863 } 864  //元素后移 865  for (int i =num.length-1; i >index; i--) { 866   num[i]=num[i-1]; 867 } 868  num[index].equals(way);//插入数据 869  System.out.println("插入字符的下标:"+index); 870  System.out.println("插入后字符的信息是:"); 871  for (int i = 0; i < num.length; i++) { 872   System.out.println(num[i]+"\t"); 873 } 874  875 Scanner input=new Scanner(System.in); 876   System.out.println("请输入4家店的价格"); 877    int[]num=new int[4]; 878    for (int i = 0; i < num.length; i++) { 879        System.out.print("第"+(i+1)+"店的价格:"); 880        num[i]=input.nextInt();       881       } 882    int min=num[0]; 883     int index=0; 884      for (int j = 0; j < num.length; j++) { 885       if (num[j]<min) { 886         min=num[j]; 887         index=j; 888       } 889        890       } 891      System.out.print("最低价格:"+min); 892      System.out.println("且它在数组中的原始位置(下标)是:" + index); 893     } 894   } 895      896      897   } 898   899   Scanner input=new Scanner(System.in); 900    String []num= new String[5]; 901    System.out.println("请输入5句话"); 902    for (int i = 0; i < num.length; i++) { 903     System.out.print("第"+(i+1)+"句话:"); 904     num[i]=input.next(); 905    } 906     System.out.println(); 907    System.out.println("逆序输出的5句话:"); 908    for (int i =num.length-1; i>=0 ; i--) { 909     System.out.print(num[i]+" "); 910   }    911 int[] points = { 18, 25, 7, 36, 13, 2, 89, 63 }; 912     System.out.println("8位顾客的积分:"); 913     for (int i = 0; i < points.length; i++) { 914       System.out.print(points[i] + "\t"); 915     } 916     System.out.println(); 917     int min = 0; 918     int index = 0; 919     min = points[0]; 920     for (int i = 1; i < points.length; i++) { 921       if (points[i] < min) { 922         min = points[i]; 923         index = i; 924       } 925     } 926     System.out.println("其中最低积分:" + min); 927     System.out.println("且它在数组中的原始位置(下标)是:" + index); 928   } 929   930 Scanner input=new Scanner(System.in); 931     int nums[] = new int[10]; 932     int a = 0; 933     int b = 0; 934     int c = 0; 935     int d = 0; 936     System.out.println("请输入10个数:"); 937     for (int i = 0; i < nums.length; i++) { 938       nums[i] = input.nextInt(); 939      940       switch (nums[i]) { 941       case 1: 942         a++; 943         break; 944       case 2: 945         b++; 946         break; 947       case 3: 948         c++; 949         break; 950       default: 951         d++; 952         break; 953       } 954        955     } 956     System.out.println("数字1的个数:"+a); 957     System.out.println("数字2的个数:"+b); 958     System.out.println("数字3的个数:"+c); 959     System.out.println("非法数字的个数:"+d); 960  961   962 Scanner input=new Scanner(System.in); 963        964   int []array=new int[]{1,3,-1,5,-2}; 965   System.out.println("原数组的为:"); 966   for (int i = 0; i < array.length; i++) { 967     System.out.print(array[i]+ " "); 968   } 969   System.out.println(); 970    int newarray[]=new int[5]; 971    for (int i = array.length - 1; i >= 0; i--) { 972       if (array[i] < 0) { 973         continue; 974       } 975       if (array[i] > 0) { 976         newarray[array.length - i - 1] = array[i]; 977       } 978     } 979     System.out.println(""); 980     System.out.println("逆序并处理后的数组为:"); 981     for (int i = 0; i < newarray.length; i++) { 982       System.out.print(newarray[i]+" "); 983     } 984      }  985 public static void main(String[] args) {     986     Scanner input=new Scanner(System.in);   987   int [] score=new int[4]; 988   int classNum=3; 989   double Sum=0.0;//成绩总和 990   double []average=new double[classNum];//平均成绩数组 991   //循环输入学员成绩 992   for (int i = 0; i <classNum; i++) { 993     Sum=0.0;//成绩总和归零 994     System.out.println("请输入第"+(i+1)+"个班的成绩"); 995     for (int j = 0; j < score.length; j++) { 996       System.out.print("第"+(j+1)+"个学员的成绩:"); 997       score[j]=input.nextInt(); 998       Sum=Sum+score[j]; 999     }1000     average[i]=Sum/score.length;//计算平均分1001     System.out.println("第"+(i+1)+"个班级参赛学员的总成绩:"+Sum);1002     System.out.print("第"+(i+1)+"个班级参赛学员的平均分是:"+average[i]+" \n");1003   }1004     1005     }1006    1007 public static void main(String[] args) {    1008     Scanner input=new Scanner(System.in);  1009   1010     1011     int [] score=new int[4];1012     int classNum=3;1013     double Sum=0.0;//成绩总和1014     int count=0;//记录80分以上的人数1015     double []average=new double[classNum];//平均成绩数组1016     //循环输入学员成绩1017     for (int i = 0; i <classNum; i++) {1018       Sum=0.0;//成绩总和归零1019       System.out.println("请输入第"+(i+1)+"个班的成绩");1020       for (int j = 0; j < score.length; j++) {1021         System.out.print("第"+(j+1)+"个学员的成绩:");1022         score[j]=input.nextInt();1023         Sum=Sum+score[j];1024         if (score[j]<85) {//成绩小于85,则跳出本次循环1025           continue;1026         }1027         count++;1028       }1029       average[i]=Sum/score.length;//计算平均分1030       System.out.println("第"+(i+1)+"个班级参赛学员的总成绩:"+Sum);1031       System.out.print("第"+(i+1)+"个班级参赛学员的平均分是:"+average[i]+" \n");1032       System.out.println("成绩85分以上的人数:"+count+"人");1033     }1034        1035   Scanner input=new Scanner(System.in);  1036   System.out.println("请输入直角三角形的行数:");1037   int Rownum=0;1038   Rownum=input.nextInt();1039   for (int i = 1; i <=Rownum; i++) {//行数1040     for (int j = 1; j <=i*2-1; j++) {//星数1041       System.out.print("☆");1042     }1043     System.out.println();1044   }1045     } 1046     Scanner input=new Scanner(System.in);  1047   System.out.println("请输入倒直角三角形的行数:");1048   int Rownum=0;1049   Rownum=input.nextInt();1050   for (int i = 1; i <=Rownum; i++) {//行数1051     for (int j = 1; j <=10-i; j++) {1052       System.out.print("*");1053     }1054     System.out.println("");1055   }1056 1057     } 1058   Scanner input=new Scanner(System.in);  1059   System.out.println("请输入等腰三角形的行数:");1060   int Rownum=0;1061   Rownum=input.nextInt();1062   for (int i = 1; i <=Rownum; i++) {//行数1063     for (int j = 0; j <Rownum-i; j++) {//空格数1064       System.out.print(" ");    1065     }1066     for (int k = 1; k <=2*i-1; k++) {//星星数1067       System.out.print("*");1068     }1069     System.out.println("");1070     1071     1072   } 1073 public static void main(String[] args) {    1074     Scanner input=new Scanner(System.in);  1075   int Rownum=9;1076   for (int i = 1; i <=Rownum; i++) {//行数1077     for (int j = 1; j <=i; j++) {//空格数1078       System.out.print(j+"*"+i+"="+j*i+" ");    1079     }1080     System.out.println("");1081     1082     1083   } 1084 public static void main(String[] args) {    1085     Scanner input=new Scanner(System.in);  1086   int count=0;//计数器1087   String choice="";//顾客选择是否离开1088       for (int i = 0; i <5; i++) {1089         System.out.println("欢迎光临第"+(i+1)+"家专卖店");1090       for (int j = 0; j <3; j++) {1091         System.out.println("要离开吗?(y/n)");1092       choice=input.nextLine();1093       //如果离开,则跳出,进入下一家店1094       if ("y".equals(choice)) {1095       break;1096       }1097       System.out.println("买了一件衣服");1098       count++;1099       }1100       System.out.println("离店结账");1101       }1102       System.out.println("总共买了"+count+"件衣服");1103       choice=input.nextLine();1104     1105  1106   int way = 1;  //买法1107     int k = 0;  //雏鸡数1108     for(int i=1;i<=20;i++){    //公鸡数1109       for(int j=1;j<=33;j++){  //母鸡数1110         k = 100-i-j;    //一共100只鸡1111         if(k%3 == 0 && (5*i+3*j+k/3 == 100)){//雏鸡数是3的倍数,总计100文钱1112           System.out.print("买法 " + way++ + ": ");1113           System.out.println("公鸡: " +i+ "  母鸡:" +j+ "   雏鸡:" +k);1114 1115         }1116       }1117     } 1118   Scanner input=new Scanner(System.in);  1119   1120     int[] score = new int[4];//从零开始,0,1,2,3数  ,//成绩数组1121         int classnum = 3;            //班级数目1122         double sum = 0.0;            //成绩总和1123         double average = 0.0;          //平均成绩1124         int count = 0;              //记录85分以上学员人数1125         1126         //循环输入学员成绩1127       1128         for(int i = 0; i < classnum; i++){1129           System.out.println("请输入第" + (i+1) + "个班级的成绩");1130           for(int j = 0; j < score.length; j++){1131             System.out.print("请输入第" + (j+1) + "个学员的成绩:");1132             score[j] = input.nextInt();1133             if(score[j] < 85){  //成绩小于85,则跳出本轮循环1134               continue;1135             }1136             sum = sum + score[j];      //成绩85分以上才进行累加1137             count++;1138           }    1139         }1140         average = sum / count;          //所有成绩85分以上的学员的平均分1141         System.out.println("所有成绩85分以上的学员的平均分为:" + average);1142  1143 Scanner input=new Scanner(System.in);  1144     String pass = "";        //保存用户输入密码1145     int amount = 0;          //取款金额1146     String password = "111111";    //用户密码1147     int count = 0;          //记录密码输入次数1148     boolean isPass = false;      //密码是否通过验证1149     while(count < 3 && !isPass){1150       System.out.print("请输入密码:");1151       pass = input.next();1152       if(!password.equals(pass)){1153         count++;1154         continue;1155       }1156       isPass = true;        //密码通过验证1157       System.out.print("请输入金额:");1158       amount = input.nextInt();1159       while(amount>0){1160         if(amount<=1000 && amount%100==0){1161           System.out.println("您取了" +amount+ "元");1162           System.out.println("交易完成,请取卡!");1163           break;        //完成交易,退出1164         }else{1165           System.out.print("您输入金额的金额不合法,请重新输入:");1166           amount = input.nextInt();1167           continue;      //继续让用户输入金额1168         }1169       }1170     }1171     if(!isPass){          //用户输入了3次错误密码1172       System.out.print("密码错误,请取卡!");1173     } 1174 Scanner input=new Scanner(System.in);  1175     int rows = 0;  //菱形的行数1176     System.out.print("请输入菱形行数:");1177     rows = input.nextInt();1178 1179     while(rows%2 == 0){1180       System.out.print("请输入奇数:");1181       rows = input.nextInt();1182     }1183 1184     int n = (rows+1)/2;1185     //打印菱形的上半部分1186     for(int i = 1; i <= n; i++){//外层循环变量i控制行数1187       for(int j = 1; j <= n-i; j++){//内层循环变量j控制该行空格数1188         System.out.print(" ");1189       }1190       for(int k = 1; k <= 2*i-1; k++){//内层循环变量k控制该行*号数1191         System.out.print("*");1192       }1193       System.out.print("\n");1194     }1195     //打印菱形的下半部分1196     for(int i = n-1; i >= 1; i--){1197       for(int j = 1; j <= n-i; j++){1198         System.out.print(" ");1199       }1200       for(int k = 1; k <= 2*i-1; k++){1201         System.out.print("*");1202       }1203       System.out.print("\n");1204     } 1205   Scanner input = new Scanner(System.in);1206     String answer = "";1207     boolean a = false;1208     boolean b = false;1209     do {1210       System.out.println("*********欢迎**********");1211       System.out.println("1.注册");1212       System.out.println("2.登录");1213       System.out.println("3.抽奖");1214       System.out.println("请输入:");1215       int num = input.nextInt();1216       switch (num) {1217       case 1:1218         System.out.println("您选择的是注册");1219         System.out.println("请填写个人注册信息");1220         System.out.println("用户名:");1221         String name = input.next();1222         System.out.println("密码:");1223         int nums = input.nextInt();1224         int random = (int) (Math.random() * 9000) + 1000;1225         System.out.println("用户名\t密码\t会员号");1226         System.out.println(name + "\t" + nums + "\t" + random);1227         a = true;1228         System.out.println("是否继续(y/n)");1229         answer = input.next();1230         break;1231       case 2:1232         if (a == true) {1233           System.out.println("您选择的是登录");1234           System.out.println("请输入您的用户名:");1235           name = input.next();1236           System.out.println("请输入密码:");1237           nums = input.nextInt();1238           System.out.println("欢迎您" + name);1239           b = true;1240         } else {1241           System.out.println("请您先注册,亲");1242         }1243         System.out.println("是否继续(y/n)");1244         answer = input.next();1245         break;1246       case 3:1247         int random1 = (int) (Math.random() * 9000) + 1000;1248         if (b == true) {1249           System.out.println("您选择的是抽奖");1250           System.out.println("请输入您的卡号:");1251           int kahao = input.nextInt();1252           System.out.println("本日的幸运数字为");1253           for (int i = 0; i < 5; i++) {1254             random1 = (int) (Math.random() * 9000) + 1000;1255             System.out.print(random1+"\t");1256           }1257           if (kahao == random1) {1258             System.out.println("恭喜您,您中奖了");1259             System.out.println("是否继续(y/n)");1260             answer = input.next();1261 1262           } else {1263             System.out.println("对不起!您不是本日的幸运会员.");1264             System.out.println("是否继续(y/n)");1265             answer = input.next();1266 1267           }1268 1269         } else {1270           System.out.println("请先登录,亲");1271           System.out.println("是否继续(y/n)");1272           answer = input.next();1273 1274         }1275         break;1276       default:1277         System.out.println("输入错误!");1278         System.out.println("是否继续(y/n)");1279         answer = input.next();1280         break;1281       }1282 1283     } while (answer.equals("y"));1284     System.out.println("退出");1285  1286 public class School {1287   /*1288    * School类的属性1289    * */1290 String schName;//名称1291 int classNumber;//教室数目1292 int labNumber;//机房数目1293 /*1294  * School类的Show方法1295  * */1296 public void Show(){1297   System.out.println(schName+"培训中心\n"+"配备:"+1298 classNumber+"教"+labNumber+"机");1299 1300   public static void main(String[] args) {    1301     School sch=new School();1302     System.out.println("*******初始化成员变量前*******");1303     sch.Show();1304     sch.schName="北京";1305     sch.classNumber=20;1306     sch.labNumber=30;1307     System.out.println("\n**********初始化变量后**************");1308     sch.Show();1309     1310 1311 public class Student {1312 /*Student的属性1313  * */1314   String name;1315   int age;1316   String classNo;//班级1317   String hobby;//爱好1318   /*Student的方法1319    * */1320   public void showStudent(){1321     System.out.println("姓名:"+name+"\n年龄:"+age+"\n就读于:"+classNo+"\n爱好:"+hobby);1322     1323   }1324 }1325 public static void main(String[] args) {  1326 Student stu=new Student();1327     stu.name="小小";1328     stu.age=15;1329     stu.classNo="S1";1330     stu.hobby="打篮球";1331     stu.showStudent();1332  1333 public class Visitor {1334 String name;1335 int age;1336 public void Show(){1337   Scanner input=new Scanner(System.in);1338   while (!"n".equals(name)) {1339     if (age>=18&&age<=60) {1340       System.out.println(name+"的年龄为:"+age+",门票价格为:20元\n");1341     }else {1342       System.out.println(name+"的年龄为:"+age+",门票免费\n");1343     }1344     System.out.println("请输入姓名:");1345     name=input.next();1346     if (!"n".equals(name)) {1347       System.out.print("请输入年龄:");1348     age=input.nextInt();//给age属性赋值1349     }1350   }1351   System.out.println("退出程序");1352   }1353 1354   public static void main(String[] args) {1355     //************Visitor**********1356     Scanner input=new Scanner(System.in);1357     Visitor v=new Visitor();1358     System.out.println("请输入姓名:");1359     v.name=input.next();1360     System.out.println("请输入年龄:");1361     v.age=input.nextInt();1362     v.Show();1363      1364 public class Administrator {1365 public String name;1366 public String password;1367 1368 }1369 public class OneDay {1370   public static void main(String[] args) {1371     //************Visitor**********1372     Scanner input=new Scanner(System.in);1373   Administrator as=new   Administrator();1374   as.name="admin";1375   as.password="111111";1376   //输入旧密码1377   String chioce="";1378 do {1379     System.out.println("请输入用户名:");1380     String nameinput=input.next(); 1381     System.out.println("请输入密码");1382     String pass=input.next();1383     //判断用户输入的用户名是否正确1384     if (as.name.equals(nameinput)&&as.password.equals(pass)) {1385       System.out.println("\n请输入新密码:");1386     as.password=input.next();1387     System.out.println("修改密码成功!!您的新密码:"+pass);1388     1389     }else {1390       System.out.println("用户名和密码不匹配,您没有权利更改信息");1391       System.out.println("还想继续吗?请输入(y/n)");1392       chioce=input.next();1393     }1394   }while("y".equals(chioce));1395   1396     1397     }1398   1399 1400   public class Calcutor {1401   public int num1;1402   public int num2;1403   public String yunsuan;1404   1405 }1406 Scanner input =new Scanner(System.in); 1407     Calcutor calculator=new Calcutor();1408       System.out.println("请输入操作数");1409       calculator.num1=input.nextInt();1410       System.out.println("请输入运算符");1411       calculator.yunsuan=input.next();1412       char a=calculator.yunsuan.charAt(0);1413       System.out.println("请输入操作数");1414       calculator.num2=input.nextInt();1415       switch(a){1416       case '+':1417         System.out.println(calculator.num1+"+"+calculator.num2+"="+(calculator.num1+calculator.num2));1418         break;1419 1420 1421 public class Currentlor {1422   public String time;1423   public void show(){1424 1425   }1426   public String time2;1427   public void show(){1428     1429   } 1430   public static void main(String[] args) {1431     Scanner input =new Scanner(System.in); 1432     Currentlor currentTime=new Currentlor();1433     currentTime.time="2015年5月12日10点11分00秒";1434     System.out.println(currentTime.time);1435     currentTime.show();1436     System.out.println("改后为");1437     Domo domo=new Domo();1438     domo.time2="2015年5月12日10点11分30秒";1439     System.out.println(domo.time2);1440     domo.show();1441 1442  1443 public class Season {1444   String spring(){1445     return "\n该季节为春季";1446   }1447   String summer (){1448     return "\n该季节为夏季";1449   }1450   String autumn(){1451     return "\n该季节为秋季";1452   }1453   String winter(){1454     return "\n该季节冬季";1455   }1456 }   1457 1458   public static void main(String[] args) {1459     // TODO Auto-generated method stub1460     Season sn=new Season();1461     //获取输入1462     /* 接收成绩 */1463     Scanner input = new Scanner(System.in);1464     System.out.print("请输入月份:");1465     int mon = input.nextInt();1466     switch(mon){1467       case 1:1468       case 2:1469       case 3:1470         System.out .println(sn.spring());1471         break;1472       case 4:1473       case 5:1474       case 6:1475         System.out .println(sn.summer());1476         break;1477       case 7:1478       case 8:1479       case 9:      1480         System.out .println(sn.autumn());1481         break;1482       case 10:1483       case 11:1484       case 12:1485         System.out .println(sn.winter());1486         break;1487       default:1488           System.out .println("输入有误,请输入1~12月份数。");1489         break;1490       1491     }   1492  1493 public class GuessMachine {1494   String name ;1495    double price;1496     1497    /**1498     * 初始化商品信息1499     */1500     public void initial(){1501       int random = (int)(Math.random()*10); //产生随机数1502       switch(random){1503        case 0:1504        case 1:1505        case 2:1506        case 3: 1507          name = "公主电动车";1508          price = 2000;1509          break;1510        case 4:1511        case 5:1512        case 6: 1513          name = "34寸纯平彩电";1514          price = 3000;1515          break;1516        case 7:1517        case 8:1518        case 9:1519          name = "新飞冰箱";1520          price = 3400;1521          break;1522        default: 1523          break;1524       } 1525     }  1526     1527     /**1528      * 猜测1529     */1530     public void guess(){1531       System.out.print("\n请猜测\""+ name + "\"的价格: " );1532       Scanner input = new Scanner(System.in);1533       double guessPrice = input.nextDouble();  //从键盘获取用户猜的价格;1534       boolean isCorrect = false;1535       for(int i = 0; i<3; i++){  //允许最多猜4次      1536         if(guessPrice == price){  //判断是否猜对,并给出提示信息1537           System.out.println("猜对了!");1538           isCorrect = true;1539           break;1540         }else if(guessPrice > price){1541           System.out.println("再小点!");1542         }else{1543           System.out.println("再大点!");1544         }1545         System.out.print("\n再猜一次吧: ");1546         guessPrice = input.nextDouble(); 1547       }1548       if(!isCorrect){1549         System.out.println("\n4次内没有猜对,下次努力吧!");1550       }}1551 public static void main(String[] args) {1552     GuessMachine gm = new GuessMachine();1553     gm.initial();1554     gm.guess();1555   }1556  1557 public class Computer {1558   public String nickName;1559   public int fenshu;1560   public int chuquan(){1561     int num=(int)(Math.random()*3)+1;1562     switch (num) {1563     case 1:1564       System.out.println("["+nickName+"]"+"您出的是剪刀");1565       break;1566     case 2:1567       System.out.println("["+nickName+"]"+"您出的是石头");1568       break;1569     case 3:1570       System.out.println("["+nickName+"]"+"您出的是布");1571       break;1572     default:1573       break;1574     }1575     return num;1576 }1577 1578 public class Judge {1579   Computer computer = new Computer();1580   Person person = new Person();1581   int count = 0;1582   String answer = "";1583 1584   public void result() {1585     System.out.println("游戏结束了,比赛结果如下");1586     System.out.println(person.nickName + "\tVS" + computer.nickName);1587     System.out.println("我们一共玩了" + count + "局");1588     System.out.println("其中我赢了" + person.fenshu + "局");1589     if (person.fenshu > computer.fenshu) {1590       System.out.println("我战胜了你");1591     } else if (person.fenshu == computer.fenshu) {1592       System.out.println("我们打了个平手");1593 1594     } else {1595       System.out.println("我输了,其实我是让你的");1596     }1597   }1598 1599   public void getOnceResult() {1600     Scanner input = new Scanner(System.in);1601     System.out.println("您确定对战吗?(y/n)");1602     answer = input.next();1603     do {1604       count++;1605       int person1 = person.chuquan();1606       int computer1 = computer.chuquan();1607       if (person1 == 1 && computer1 == 2 || person1 == 21608           && computer1 == 3 || person1 == 3 && computer1 == 1) {1609         System.out.println("不好意思,我赢了");1610         person.fenshu++;1611       } else if (person1 == computer1) {1612         System.out.println("我们平局");1613       } else {1614         System.out.println("我输了,你厉害");1615         computer.fenshu++;1616 1617       }1618       System.out.println("继续吗?(y/n)");1619       answer = input.next();1620     } while (answer.equals("y"));1621   }1622 1623   public void menuList() {1624     System.out.println("------------------欢迎进入天尽头猜拳系统--------------");1625     System.out.println("\n\t\t******************");1626     System.out.println("\n\t\t*****游戏开始了 ******");1627     System.out.println("\n\t\t*******************");1628     System.out.println("出拳规则:1.剪刀 2.石头  3.布");1629     System.out.println("请选择对方角色:1.上帝  2.耶稣   3.佛祖");1630     Scanner input = new Scanner(System.in);1631     int num = input.nextInt();1632     System.out.println("请输入您的大名:");1633     person.nickName = input.next();1634     switch (num) {1635     case 1:1636       computer.nickName = "上帝";1637 1638       System.out.println(person.nickName + ",您选择与上帝对战");1639 1640       break;1641     case 2:1642       computer.nickName = "耶稣";1643       System.out.println(person.nickName + ",您选择与耶稣对战");1644 1645       break;1646     case 3:1647       computer.nickName = "佛祖";1648       System.out.println(person.nickName + ",您选择与佛祖对战");1649       break;1650     default:1651       break;1652     }1653   }1654 1655   public void Welcome() {1656     menuList();1657     getOnceResult();1658     // 出了循环,打印结果1659     if (answer.equals("n")) {1660       result();1661 1662     }1663 public String nickName;1664   public int fenshu;1665   public int chuquan(){1666     Scanner input=new Scanner(System.in);1667     System.out.println("请出拳1.剪刀 2.石头 3.布 ");1668     int num=input.nextInt();1669     1670     switch (num) {1671     case 1:1672       System.out.println(nickName+"您出的是剪刀");1673       break;1674     case 2:1675       System.out.println(nickName+"您出的是石头");1676       break;1677     case 3:1678       System.out.println(nickName+"您出的是布");1679       break;1680     default:1681       break;1682     }1683     return num;1684 }1685 1686 public static void main(String[] args) {1687     Judge judge=new Judge();1688     judge.Welcome();1689   }1690 1691  1692 public class Loan {1693 1694   /**1695    * 计算月供1696    * @return money1697   */1698   public double loan(double loan,int yearchoice){1699     double money=0;1700   1701     if(yearchoice==1){1702       money=(loan+loan*0.0603)/36;1703     }else if(yearchoice==2){1704       money=(loan+loan*0.0612)/60;1705     }else{1706       money=(loan+loan*0.0639)/240;1707     }    1708     return money;1709   }1710 1711 /**1712    * @param args1713   */1714   public static void main(String[] args) {1715 1716     Loan l= new Loan();1717     Scanner input = new Scanner(System.in);1718     System.out .print("请输入贷款金额:");1719     double loan=input.nextDouble();1720     System.out .print("请选择贷款年限:1.3年(36个月) 2.5年(60个月) 3.20年(240个月):");1721     int yc=input.nextInt();        1722     System.out.println("\n***月供为:"+l.loan(loan, yc));1723   }1724 1725  1726 1727 public class StudentBiz {1728 /**1729  * 求平均分1730  * @param 一个学生1731 */1732 public double getAvg(Student stu){1733   return stu.java+stu.c+stu.sql/3.0;1734 }1735 public class Student {1736   public int java;1737   public int c;1738   public int sql;1739 1740 }1741 import java.util.Scanner;1742 public class Test {1743 public static void main(String[] args) {1744   Scanner input=new Scanner(System.in);1745   //实例化学生对象1746       Student student=new Student();1747       System.out.println("请输入java的成绩");1748       student.java=input.nextInt();1749       System.out.println("请输入c的成绩:");1750       student.c=input.nextInt();1751       System.out.println("请输入sql的成绩:");1752       student.sql=input.nextInt();1753       1754       StudentBiz sb=new StudentBiz();1755       double avgScore=sb.getAvg(student);1756       System.out.println("平均分:"+avgScore);1757         1758 }1759 } 1760 public class Triangle {1761   /**1762    * 三角形的判断1763    * @param a、b、c边长1764    * @return 是否是三角形1765   */1766   public boolean isTriangle(int a,int b,int c){1767     boolean flag=false;1768     if((a+b)>c &&(b+c)>a &&(a+c)>b){1769       flag=true;1770     }1771     return flag;1772   }1773   /**1774    * 三角形的形状判断1775    * @param a、b、c边长1776    * @return 何种三角形1777   */1778   public String Shape(int a,int b,int c){1779     String shape="";    1780     1781     if((a==b)&&(b==c)&&(c==a)){1782       shape="等边三角形";1783     }else if((a==b)||(b==c)||(c==a)){1784       shape="等腰三角形";1785     }else {1786       int A=a*a;1787       int B=b*b;1788       int C=c*c;1789       if((A>B+C)||(B>A+C)||(C>A+B)){1790         shape="钝角三角形";1791       }else if((A==B+C)||(B==A+C)||(C==A+B)){1792         shape="直角三角形";1793       }else{1794         shape="锐角三角形";1795       }1796     }1797     return shape;1798   }1799 1800 public class TestTriangle {1801 public static void main(String[] args) {1802 1803   Triangle t=new Triangle();1804   boolean con=true;1805   while(con){1806     Scanner input = new Scanner(System.in);1807     System.out .print("请输入第一条边:");1808     int num1=input.nextInt();1809     System.out .print("请输入第二条边:");1810     int num2=input.nextInt();1811     System.out .print("请输入第三条边:");1812     int num3=input.nextInt();1813     if(t.isTriangle(num1,num2,num3)){1814       System.out .print("这是一个"+t.Shape(num1, num2, num3));1815     }else{1816       System.out .print("这不能构成三角形。");1817     }1818     System.out .print("\n继续吗?(y/n):");1819     String choice=input.next();1820     if(choice.equals("n")){1821       con=false;1822       System.out .print("谢谢使用!");1823     }1824   }1825  1826 public class InputVerify {1827 public static void main(String[] args) {1828   Scanner input = new Scanner(System.in);1829   boolean con = true;1830   /*检验生日形式的有效性*/1831   while(con){1832    System.out.print("\n请输入会员生日<月/日:00/00>: ");1833    String day = input.next();1834    if(day.indexOf('/')!=2){1835      System.out.println("生日形式输入错误!");1836    }else{1837      System.out.println("该会员生日是: " + day);  1838      con = false;1839     }1840   }1841   1842   con = true;1843   /*检验用户密码的有效性*/1844   while(con){1845    System.out.print("\n请输入会员密码<6~10位>: ");1846    String psw = input.next();1847    if(psw.length() < 6 || psw.length() > 10){1848       System.out.println("密码形式输入错误!");1849    }else{1850       System.out.println("该会员的密码是: " + psw);  1851       con = false;1852     }1853   }1854 } 1855 public class StringExplorer {1856   /**1857    * 定位字符1858   */1859   public void locateChar(String full, char c) {1860     System.out.print(c + "出现的位置是: ");1861     for (int i = 0; i < full.length(); i++) {1862       if (c == full.charAt(i)) {1863         System.out.print(i + "\t");1864       }1865     }1866   }1867 1868   /**1869    * 定位字符串1870   */1871   public void locateString(String full, String s) {1872     int index = 0;1873     int i = index;1874     int length = full.length();1875     System.out.print(s + "出现的位置是: ");1876     do {1877       index = full.indexOf(s, i);1878       if (index == -1) {1879         break;1880       }1881       System.out.print(index + "  ");1882       i = index + s.length();1883     } while (i <= length);1884   }1885 */1886   public static void main(String[] args) {1887     // TODO Auto-generated method stub1888     StringExplorer se = new StringExplorer();1889     Scanner input = new Scanner(System.in);1890     System.out.println("请输入一段字符: ");1891     String full = input.next();1892     System.out.println("请输入要查询的字符串: ");1893     String s = input.next();1894     se.locateString(full, s);1895   }1896