入门java编程题

发布网友发布时间：2022-04-30 21:21

共2个回答

热心网友时间：2023-06-13 01:30

灞曞紑鍏ㄩ儴public class Circle {

private double radius = 0d;

public Circle(){

this.radius = 0d;

}

public Circle(double r){

this.radius = r;

}

public double getArea(){

return Math.PI*radius*radius;

}

public double getPerimeter(){

return Math.PI*radius*2;

}

void show(){

System.out.println(String.format("鍗婂緞锛?.2f",radius));

System.out.println(String.format("鍛ㄩ暱锛?.2f",getPerimeter()));

System.out.println(String.format("闈㈢Н锛?.2f",getArea()));

}
}杩介棶娌℃湁main

热心网友时间：2023-06-13 01:30

灞曞紑鍏ㄩ儴package test02;public class Circle {private static final double PI = 3.1415926535;private double Radius;//鍦嗙殑鍗婂緞public Circle(){this(0);}public Circle(double r){Radius = r;}public double getArea(){return PI*Radius*Radius;}public double getPerimeter(){return 2*PI*Radius;}public void show(){System.out.println("鍦嗙殑鍗婂緞涓?quot;+Radius+",鍛ㄩ暱涓?quot;+getPerimeter()+",闈㈢Н涓?quot;+getArea());}public static void main(String[] args) {Circle c = new Circle(2);c.show();}}