package com.heima.code;

import java.util.HashMap;
import java.util.Iterator;

/*
map扩展知识
map集合被使用时因为具备映射关系。
map扩展知识
map集合被使用时因为具备映射关系。
"yuere" "01"  "zhangsan"
"yuere" "02"  "lisi"

"jiuye"  "01" "wangwu"
"jiuye"  "02" "zhaoliu"
* */
public class MapDemo05 {
        public static void main(String[] args) {
   
    HashMap<String,HashMap<String, String>> czbk = new HashMap<String,HashMap<String, String>>();
    HashMap<String,String> yure = new HashMap<String, String>();
    HashMap<String,String> jiuye = new HashMap<String, String>();

    czbk.put("yure", yure);
    czbk.put("jiuye", jiuye);
   
    yure.put("01", "zhangsan");
    yure.put("02", "lisi");
   
    jiuye.put("01", "zhaoliu");
    jiuye.put("02", "wangwu");
   
    //遍历ｃｚｂｋ，获取所有的教室
    Iterator<String> it = czbk.keySet().iterator();
   
    while(it.hasNext()){
            String roomName = it.next();
            HashMap<String, String> room = czbk.get(roomName);
            System.out.println(roomName);
            getStudentInfo(room);
    }
   
   
/*   
    getStudentInfo(yure);
    getStudentInfo(jiuye);*/

        }
    public static void getStudentInfo(HashMap<String,String> roomMap){
   
            Iterator<String> it = roomMap.keySet().iterator();
            while(it.hasNext()){
                    String id = it.next();
                    String name = roomMap.get(id);
                    System.out.println(id+":"+name);
            }
    }
}

package com.heima.code;

import java.util.HashMap;
import java.util.Iterator;

/*
map扩展知识
map集合被使用时因为具备映射关系。
map扩展知识
map集合被使用时因为具备映射关系。
"yuere" "01"  "zhangsan"
"yuere" "02"  "lisi"

"jiuye"  "01" "wangwu"
"jiuye"  "02" "zhaoliu"
* */
public class MapDemo05 {
        public static void main(String[] args) {
   
    HashMap<String,HashMap<String, String>> czbk = new HashMap<String,HashMap<String, String>>();
    HashMap<String,String> yure = new HashMap<String, String>();
    HashMap<String,String> jiuye = new HashMap<String, String>();

    czbk.put("yure", yure);
    czbk.put("jiuye", jiuye);
   
    yure.put("01", "zhangsan");
    yure.put("02", "lisi");
   
    jiuye.put("01", "zhaoliu");
    jiuye.put("02", "wangwu");
   
    //遍历ｃｚｂｋ，获取所有的教室
    Iterator<String> it = czbk.keySet().iterator();
   
    while(it.hasNext()){
            String roomName = it.next();
            HashMap<String, String> room = czbk.get(roomName);
            System.out.println(roomName);
            getStudentInfo(room);
    }
   
   
/*   
    getStudentInfo(yure);
    getStudentInfo(jiuye);*/

        }
    public static void getStudentInfo(HashMap<String,String> roomMap){
   
            Iterator<String> it = roomMap.keySet().iterator();
            while(it.hasNext()){
                    String id = it.next();
                    String name = roomMap.get(id);
                    System.out.println(id+":"+name);
            }
    }
}