Java定义矩形类
矩形类
package cn.edu.uibe.oop;
public class Rectangle {
float width,height;
/**
* 计算面积
* @return 矩形的面积
*/
public float getArea(){
return width*height;
}
/**
* 计算周长
* @return 矩形的周长
*/
public float getCircumference(){
return 2*(width+height);
}
/**
* 改变矩形的大小
* @param w 宽度
* @param h 高度
*/
public void resize(float w,float h){
width = w;
height = h;
}
/**
* 输出矩形的宽和高
*/
public void printSize(){
System.out.println("宽:"+width+" 高:"+height);
}
public static void main(String[] args) {
Rectangle r1 = new Rectangle();
Rectangle r2 = new Rectangle();
r1.resize(4.0F, 3.0F);
r2.resize(2, 5);
r1.printSize();
r2.printSize();
System.out.println("矩形1的面积:"+r1.getArea());
System.out.println("矩形2的面积:"+r2.getArea());
System.out.println("矩形1的周长:"+r1.getCircumference());
System.out.println("矩形2的周长:"+r2.getCircumference());
}
}