java基础入门----Map扩展2

import java.util.*;

class Student1
{
private String id;
private String name;
Student1(String id, String name)
{
this.id = id;
this.name = name;
}
public String toString()
{
return id+"..."+name;
}
}
class Map扩展2
{
public static void sop(Object obj)
{
System.out.println(obj);
}

public static void main(String[] args)
{
HashMap<String,List<Student1>> czbk = new HashMap<String,List<Student1>>();
List<Student1> yure = new ArrayList<Student1>();
List<Student1> jiuye = new ArrayList<Student1>();

czbk.put("yure", yure);
czbk.put("jiuye", jiuye);

yure.add(new Student1("02","sss"));
yure.add(new Student1("03","cfc"));
jiuye.add(new Student1("04","eff"));
jiuye.add(new Student1("06","hh"));

//遍历czbk集合，获取所有教室
Iterator<String> it = czbk.keySet().iterator();
while(it.hasNext())
{
String roomName = it.next();
List<Student1> room = czbk.get(roomName);
sop(roomName);
getStuInfo(room);
}

}
public static void getStuInfo(List<Student1> list)
{
Iterator<Student1> it = list.iterator();
while(it.hasNext())
{
Student1 s = it.next();
sop(s);
}
}
}