定義類Human，具有若干屬性和功能；定義其子類Man、Woman； 在主類Test中分別創建子類、父類和上轉型對象，並測試其特性。

package com.hanqi.test;

public class Humen {
    private String speak;
    private String read;
    private String listen;
    public String getSpeak() {
        return speak;
    }
    public void setSpeak(String speak) {
        this.speak = speak;
    }
    public String getRead() {
        return read;
    }
    public void setRead(String read) {
        this.read = read;
    }
    public String getListen() {
        return listen;
    }
    public void setListen(String listen) {
        this.listen = listen;
    }
    
    public void run()
    {
        System.out.println("我會跑");
    }
    public void jump()
    {
        System.out.println("我會跳");
    }
    

}

package com.hanqi.test;

public class Men extends Humen {
    

}

package com.hanqi.test;

public class Women extends Humen {

}

package com.hanqi.test;

public class Testmen {

    public static void main(String[] args) {

            Humen h=new Men(); 
            
            Men m=(Men)h;
            
            m.run();
            Women w=new Women();
            
            w.jump();

    }

}