public static void main(String[] args) { //--------------------------------------------------------------------------------------------------------- //计算机班所有人的名字 Set<String> name=new HashSet<>(); name.add("张三"); name.add("庆儿"); name.add("李四"); name.add("赵四"); //--------------------------------------------------------------------------------------------------------- //三国班所有人的名字 Set<String> name1=new HashSet<>(); name1.add("赵子龙"); name1.add("刘备"); name1.add("关羽"); name1.add("张飞"); System.out.println("三国班所有学生的名字:"+name1); //--------------------------------------------------------------------------------------------------------- //一个系里面所有班级人数是姓名 Map<String, Object> className=new HashMap<>(); className.put("计算机班", name); className.put("三国班", name1); System.out.println("计算机系所有学生的姓名:"+className); //--------------------------------------------------------------------------------------------------------- //系A Map<String, Object> series_A=new HashMap<>(); series_A.put("系A班", name); series_A.put("系A班", name1); //系B Map<String, Object> series_B=new HashMap<>(); series_B.put("系B班", name); series_B.put("系B班", name1); List<Map<String, Object>> collage1=new ArrayList<>(); collage1.add(series_A); collage1.add(series_B); //----------------------------------------------------------------------------------------- //系C Map<String, Object> series_C=new HashMap<>(); series_C.put("系C班", name); series_C.put("系C班", name1); //系D Map<String, Object> series_D=new HashMap<>(); series_D.put("系D班", name); series_D.put("系D班", name1); List<Map<String, Object>> collage2=new ArrayList<>(); collage2.add(series_C); collage2.add(series_D); Map<String, Object> school =new HashMap<>(); school.put("三国学院", collage1); school.put("英雄学院", collage2); System.out.println("一个学校所有学院同学的姓名:"+school); }
原文:http://www.cnblogs.com/jiangxifanzhouyudu/p/6702454.html