矩形面积

package 面向对象编程;

public class juxing {
    double chang;
    double kuan;
    juxing(double chang,double kuan)
    {
        this.chang=chang;
        this.kuan=kuan;
    }
    //计算面积
    double getMianJi()
    {
        return this.chang*this.kuan;
    }
    public static void main(String[]args)
    {
        juxing myJX=new juxing(1,5);
        System.out.println("矩形的面积="+myJX.getMianJi());

    }

}