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)。

Java-继承,多态练习0922-02

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:

Java-继承,多态练习0922-02

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