第七周作业

package test;

import java.util.Random;
import java.util.Scanner;

public class hhh {
	public static void main(String[] args) {
        // TODO Auto-generated method stub
		  Rectangle r=new Rectangle();
		  
	        r.length=3.6;
	        r.width=1.2;
	        r.getPer();
	        r.getArea();
	        r.showAll();
       
	}
}

　　

package test;

import java.util.Scanner;

public class Rectangle {
	 double length;
	    double width;
	   
	   
	    public void getArea() {
	        double area=length*width;
	        System.out.println("面积为"+area);
	    }
	    public void getPer() {
	        double per= 2*(length+width);
	        System.out.println("周长为"+per);
	    }
	    public void showAll() {
	        System.out.println("长为"+length);
	        System.out.println("宽为"+width);
	        System.out.println("面积为"+length*width);
	        System.out.println("周长为"+(length+width));
	        
	    }
	}