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JAVA练习9

发布时间:2017-11-20 11:00:37
public class Circle { private double radius; public Circle(){ this.radius=1; } public Circle(double radius){ this.radius=radius; } publi ...
JAVA练习9
public class Circle { private double radius;  public Circle(){  this.radius=1; } public Circle(double radius){  this.radius=radius; }  public double getArea(){  return radius*radius*Math.PI;   } public double getPerimeter(){  return 2*radius*Math.PI;   } public void setRadius(double newRadius) {  this.radius=newRadius; }}
JAVA练习9

 

JAVA练习9
public class Democirle { public static void main(String[] args) {  // TODO 自动生成的方法存根  Circle circle1=new Circle();  System.out.println(circle1.getArea());  Circle circle2=new Circle(10);  System.out.println(circle2.getArea());  Circle circle3=new Circle();  System.out.println(circle3.getPerimeter());  Circle circle4=new Circle(10);  System.out.println(circle4.getPerimeter());  circle2.setRadius(2);  System.out.println(circle2.getPerimeter()); }}
JAVA练习9

 

 JAVA练习9

 

JAVA练习9
public class Simplecircle {private double radius;  public Simplecircle(){  this.radius=1; } public Simplecircle(double radius){  this.radius=radius; }  public double getArea(){  return radius*radius*Math.PI;   } public double getPerimeter(){  return 2*radius*Math.PI;   } public void setRadius(double newRadius) {  this.radius=newRadius; } public static void main(String[] args) {  // TODO 自动生成的方法存根  Circle circle1=new Circle();  System.out.println(circle1.getArea());  Circle circle2=new Circle(5);  System.out.println(circle2.getArea());  Circle circle3=new Circle();  System.out.println(circle3.getPerimeter());  Circle circle4=new Circle(10);  System.out.println(circle4.getPerimeter());  circle2.setRadius(2);  System.out.println(circle2.getPerimeter()); }}
JAVA练习9

JAVA练习9

 

JAVA练习9
public class TestTV { public static void main(String[] args) {  // TODO 自动生成的方法存根  TV tv1=new TV();  tv1.turnOn();  tv1.setChannel(6);  tv1.setChannel(121);  tv1.setVolumeLevel(5);  tv1.setVolumeLevel(9);    //tv1.turnOff();  //tv1.setChannel(6);  //tv1.setVolumeLevel(5);    TV tv2=new TV();  tv2.turnOn();  System.out.println("TV2's channel is "+tv2.channel+" and volume is "+tv2.volumeLevel);  tv2.channelUp();  tv2.volumeUp();  System.out.println("TV2's channel is "+tv2.channel+" and volume is "+tv2.volumeLevel); }}
JAVA练习9

JAVA练习9

  

原标题:JAVA练习9

关键词:JAVA

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