7.6实战练习2矩形

package org.hanqi.pn0120;

public class Juxing {
    
    Juxing()
    {
        chang=15;
        
        kuan=10;
    }
    
    double chang;
    double kuan;
    
    
    
    void mianji()
    {
        System.out.println("mianji="+chang*kuan);
    }
    
    public static void main(String[] args) {
        
        Juxing myJuxing=new Juxing();
        
        myJuxing.mianji();
        
        

    }

}