Java-继承，多态练习0922-02

创建如下三个类：（People类中的三个方法分别输出一些信息，ChinaPeople

和AmericanPeople类重写父类的三个方法）。

父类：

package com.lianxi1;

public class People {
    //属性
    protected double height;
    protected double weight;
    public double getHeight() {
        return height;
    }
    public void setHeight(double height) {
        this.height = height;
    }
    public double getWeight() {
        return weight;
    }
    public void setWeight(double weight) {
        this.weight = weight;
    }
    
    //构造方法
    public People(double height, double weight) {
        super();
        this.height = height;
        this.weight = weight;
    }
    public People() {
        super();
    }
    
    //成员方法
    public void speakHello()
    {
        System.out.println("你好");
    }
    public void averageHeight()
    {
        System.out.println("身高："+height);
    }
    public void averageWeight()
    {
        System.out.println("体重："+weight);
    }

子类：

package com.lianxi1;

public class ChinaPeople extends People {

    private String gongfu;
    
    
    public String getGongfu() {
        return gongfu;
    }


    public void setGongfu(String gongfu) {
        this.gongfu = gongfu;
    }


    public void chinaGongfu()
    {
        System.out.println("功夫："+gongfu);
    }
}

package com.lianxi1;

public class AmericanPeople extends People {
    
    private String Boxing;

    public String getBoxing() {
        return Boxing;
    }

    public void setBoxing(String boxing) {
        Boxing = boxing;
    }

    public void icanBoxing()
    {
        System.out.println("拳击："+Boxing);
    }
}

测试：

package com.lianxi1;

public class Test {

    public static void main(String[] args) {
        ChinaPeople ch=new ChinaPeople();
        AmericanPeople am=new AmericanPeople();
        ch.setHeight(173);
        ch.setWeight(65);
        ch.setGongfu("降龙十八掌");
        am.setBoxing("勾拳");
        ch.averageHeight();
        ch.averageWeight();
        ch.chinaGongfu();
        am.icanBoxing();

    }

}

结果：