//Studnet

package yzhou.gen03;

public class Student<T>

{

   private    T score;

    public T getScore()

    {

        return score;

    }

    public void setScore(T score)

    {

        this.score = score;

    }

}

//BjStu

package yzhou.gen03;

public class Student<T>

{

   private    T score;

    public T getScore()

    {

        return score;

    }

    public void setScore(T score)

    {

        this.score = score;

    }

}

package yzhou.gen03;

import java.util.HashMap;

import java.util.Map;

import java.util.Set;

import java.util.Map.Entry;

/**

 * 泛型嵌套   -->由外到内拆分

 * @author 洋

 *

 */

public class StudentApp

{

    public static void main(String[] args)

    {

        Student<String> stu = new Student<String>();

        stu.setScore("优秀");

        System.out.println(stu.getScore());

        BjStu<Student<String>> bjstu  = new BjStu<Student<String>>();

        bjstu.setStu(stu);

        stu = bjstu.getStu();

        String score = stu.getScore();

        System.out.println(score);

        //HashMap  ---> 泛型嵌套

        Map<String,String> map  = new HashMap<String,String>();

        map.put("a", "java300");

        map.put("b","zhangsan");

        Set<Entry<String,String>> entrySet = map.entrySet();

        //循环遍历 Map

        for(Entry<String, String> entry:entrySet)

        {

            String key = entry.getKey();

            String value= entry.getValue();

            System.out.println(key+"-->"+value);

        }

    }

}