0922-----homework-part1---about generic

package com.kai.li;

//Client
public class Text1{
    public static void main(String[] args){

        //Outter class's instance
        Outter o=new Outter();

        //The first question
        //Imitate an class of Music text
        System.out.println();
        System.out.println("Following is the first question.");
        Outter.Music m=o.new Music();
        Outter.Instrument<String> i=o.new Wind<String>("Wind");
        m.tune(i);
        i=o.new Brass<String>("Brass");
        m.tune(i);
        System.out.println();
        
        //The second question
        System.out.println("Following is the second question.");
        Outter.Monkey<String,Integer> monkey=o.new People<String,Integer>("kaili",31);
        monkey.speak();
        monkey.think();
        System.out.println();

        //The third question
        System.out.println("Following is the third question.");
        Outter.Human<String,Integer> human=o.new Man<String,Integer>("Aorbeme",60);
        human.people();
        Outter.Man<String,Integer> man=o.new Man<String,Integer>("lim",2); 
        if(human instanceof Outter.Man<?,?>)
            man=(Outter.Man<String,Integer>)human;
        man.people();
        man.work();
        human=o.new Human<String,Integer>("father",100);
        human.people();
    }
}

//Outter class of all the questions
class Outter{
    
    //The first question
    //Imitate three class by Instrument,Wind and Brass about music instrument
    //The following is instrument class
    class Instrument<T>{
        protected void play(){
            System.out.println("I can play~");
        }
        //the function following will be override by his children class
        //it's an empty funcion
        protected void play2(){}
    }
    //The following is Wind class
    class Wind<T> extends Instrument<T>{
        private T name;
        Wind(T name){
            this.name=name;
        }
        public T getName(){
            return name;
        }
        public void play(){
            System.out.println("I am "+getName()+",I can play with wu... wu... wu... !");
        }
        public void play2(){
            System.out.println("I can play as the Wind");
        }
    }
    //The following is Brass class
    class Brass<T> extends Instrument<T>{
        private T name;
        Brass(T name){
            this.name = name;
        }
        public T getName(){
            return name;
        }
        public void play(){
            System.out.println("I am "+getName()+",I can play with ba... ba... ba...");
        }
        public void play2(){
            System.out.println("I can play as the Brass");
        }
    }
    //the following is Music class only have one function by text
    class Music{
        public void tune(Instrument<? extends String> i){
            i.play();
            i.play2();
        }
    }

    //the following is the second question
    class Monkey<T2,T3>{
        private T2 name;
        private T3 age;
        
        protected Monkey(T2 name){
            this.name=name;
        }
        protected Monkey(T2 name,T3 age){
            this(name);
            this.age=age;
        }
        protected void setName(T2 name){
            this.name=name;
        }
        protected void setAge(T3 age){
            this.age=age;
        }
        protected T2 getName(){
            return name;
        }
        protected T3 getAge(){
            return age;
        }
        protected void speak(){
            System.out.println("yi ya... yi ya... yi ya...");
        }
        //using at override
        protected void think(){}
    }
    class People<T2,T3> extends Monkey<T2,T3>{
        
        public People(T2 name){
            super(name);
        }
        public People(T2 name,T3 age){
            super(name,age);
        }
        public void speak(){
            System.out.println("中国的！小子，你哪的？");
        }
        public void think(){
            System.out.println("I am a person,I can think.");
            System.out.println("So,you can keep your mouth.");
            System.out.println("Then, do think!");
        }
    }

    //following is the third question
    class Human<T4,T5>{
        private T4 name;
        private T5 age;
        protected Human(T4 name,T5 age){
            this.name=name;
            this.age=age;
        }
        protected void setName(T4 name){
            this.name=name;
        }
        protected void setAge(T5 age){
            this.age=age;
        }
        protected T4 getName(){
            return name;
        }    
        protected T5 getAge(){
            return age;
        }
        protected void people(){
            System.out.println("men and women are person");
        }
    }
    class Man<T4,T5> extends Human<T4,T5>{
        public Man(T4 name,T5 age){
            super(name,age);
        }
        public void people(){
            System.out.println("i am a man");
        }
        public void work(){
            System.out.println("a man should work hard");
        }
    }
    class Women<T4,T5> extends Human<T4,T5>{
        public Women(T4 name,T5 age){
            super(name,age);
        }
        public void people(){
            System.out.println("i am a women");
        }
        public void work(){
            System.out.println("a women can work hard as a man");
        }
    }
}