按要求编写Java应用程序。
(1)创建一个叫做People的类:
属性:姓名、年龄、性别、身高 行为:说话、计算加法、改名
编写能为所有属性赋值的构造方法;
(2)创建主类:
创建一个对象:名叫“张三”,性别“男”,年龄18岁,身高1.80;
让该对象调用成员方法:1)说出“你好!” 2) 计算23+45的值 3) 将名字改为“李四”
1 public class People { 2 3 private String name; 4 private String sex; 5 private int age; 6 private double height; 7 8 public String getName() { 9 return name;10 }11 12 public void setName(String name) {13 this.name = name;14 }15 16 People(String name, String sex, int age, double height) {17 this.name = name;18 this.sex = sex;19 this.age = age;20 this.height = height;21 }22 23 public void sayHi() {24 System.out.println(this.name + ": 你好!");25 }26 27 public double doAdd(double a, double b) {28 return a + b;29 }30 31 public void gaiMingZi(String name) {32 this.name = name;33 34 }35 36 public static void main(String[] args) {37 People p1 = new People("张三", "男", 18, 180);38 39 p1.sayHi();40 System.out.println("23+45=" + p1.doAdd(23, 45));41 p1.gaiMingZi("李四");42 System.out.println("大家好,我是: " + p1.name);43 System.out.println(p1.name + "的个人信息:" + p1.toString());44 }45 46 @Override47 public String toString() {48 return " [name=" + name + ", sex=" + sex + ", age=" + age + "岁, height=" + height + "cm]";49 }
运行结果:
原标题:Java类和对象8
关键词:JAVA