1 public class Demo1 {
 2
 3     public static void main(String[] args) {
 4         /*HashMap<Student,Object> map=new HashMap<Student,Object>();
 5         Student student=new Student(1,"大明",20);
 6         Student student1=new Student(1,"大明",20);
 7         Student student2=new Student(3,"舔狗",22);
 8
 9         ArrayList<String> list=new ArrayList<String>();
10         list.add("3333");
11         list.add("444");
12         map.put(student1, list);
13         map.put(student2, list);
14         map.put(student, list);
15
16         System.out.println(map);*/
17
18         LinkedHashMap<String,Object> linkedHashMap=new LinkedHashMap<String,Object>();
19         ArrayList<String> arrayList=new ArrayList<String>();
20         arrayList.add("333");
21         arrayList.add("999");
22         arrayList.add("555");
23
24         ArrayList<String> arrayList1=new ArrayList<String>();
25         arrayList1.add("AAA");
26         arrayList1.add("EEE");
27         arrayList1.add("QQQ");
28
29         linkedHashMap.put("1",arrayList);
30         linkedHashMap.put("1",arrayList1);
31
32         Set<String> keys=linkedHashMap.keySet();
33         /*for (String string : keys) {
34             System.out.println(string+"="+linkedHashMap.get(string));
35         }*/
36         java.util.Iterator<String> iterator=keys.iterator();
37         while(iterator.hasNext()){
38             String key=iterator.next();
39             System.out.println(key+"="+linkedHashMap.get(key));
40         }
41
42
43     }
44
45 }