Java-继承,多态0922-05

java

28.按要求编写一个Java应用程序:

(1)定义一个类,描述一个矩形,包含有长、宽两种属性,和计算面积方法。

(2)编写一个类,继承自矩形类,同时该类描述长方体,具有长、宽、高属性,

和计算体积的方法。

(3)编写一个测试类,对以上两个类进行测试,创建一个长方体,定义其长、

宽、高,输出其底面积和体积。

父类:

package com.lianxi4;

public class Juxing {

private double chang;

private double kuan;

public double getChang() {

return chang;

}

public void setChang(double chang) {

this.chang = chang;

}

public Juxing(double chang, double kuan) {

super();

this.chang = chang;

this.kuan = kuan;

}

public Juxing() {

super();

}

public double mianJi()

{

return chang*kuan;

}

}

子类:

package com.lianxi4;

public class Tiji extends Juxing {

private double gao;

public Tiji(double chang, double kuan, double gao) {

super(chang, kuan);

this.gao = gao;

}

public double tiJi()

{

return super.mianJi()*gao;

}

}

测试:

package com.lianxi4;

public class Test {

public static void main(String[] args) {

Tiji ti=new Tiji(5,6,7);

System.out.println("面积:"+ti.mianJi());

System.out.println("体积:"+ti.tiJi());

}

}

结果:

以上是 Java-继承,多态0922-05 的全部内容, 来源链接: utcz.com/z/392902.html

回到顶部