Java中HashMap（泛型嵌套）的遍历

//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);
        }
    }
}