Monkey类、People类和主类 E。

package jicheng;

public class Monkey {

        private String s;

        public String getS() {

            return s;

        }

        public void setS(String s) {

            this.s = s;

        }

        public Monkey(String s) {

            super();

            this.s = s;

        }

        public void speak()

        {

            System.out.println(getS()+":咿咿呀呀......");

        }

}

package jicheng;

public class People extends Monkey {

    public People(String s) {

        super(s);

    }

    public void speak()

    {

        System.out.println(getS()+":小样的，不错嘛！会说话了！");

    }

    public void think()

    {

        System.out.println(getS()+":别说话，认真思考！");

    }

}

package jicheng;

public class E1 {

    public static void main(String[] args) {

           Monkey hou=new Monkey("猴子");

           hou.speak();

           People ren=new People("人");

           ren.speak();

           ren.think();

    }

}