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HashMap嵌套HashMap

沒啥好說的，直接看代碼。

輸入：

package com.guiyang.bean;import java.util.HashMap;public class Demo8_HashMapHashMap {public static void main(String[] args) {HashMap<People, String> c1 = new HashMap<>();c1.put(new People("張三", 23), "北京");c1.put(new People("李四", 26), "廣州");c1.put(new People("王五", 25), "深圳");HashMap<People, String> c2 = new HashMap<>();c2.put(new People("Ada", 21), "廈門");c2.put(new People("Jack", 20), "南京");c2.put(new People("Petter", 26), "廣州");c2.put(new People("Black", 20), "香港");HashMap<HashMap<People, String>, String> c = new HashMap<>();c.put(c1, "一班");c.put(c2, "二班");for (HashMap<People, String> hashMap : c.keySet()) {for (People people : hashMap.keySet()) {System.out.println(people + " = " + hashMap.get(people) + c.get(hashMap));}}} }

輸出：

People [name=張三, age=23] = 北京一班 People [name=李四, age=26] = 廣州一班 People [name=王五, age=25] = 深圳一班 People [name=Petter, age=26] = 廣州二班 People [name=Black, age=20] = 香港二班 People [name=Ada, age=21] = 廈門二班 People [name=Jack, age=20] = 南京二班

總結

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