1 @org.junit.Test
2 public void TestTreeMap2(){
3 Comparator comparator=new Comparator() {
4 @Override
5 public int compare(Object o1, Object o2) {
6 if (o1 instanceof Student && o2 instanceof Student){
7 Student stu1=(Student)o1;
8 Student stu2=(Student)o2;
9 int i=stu1.getName().compareTo(stu2.getName());
10 if(i==0){
11 return stu1.getAge().compareTo(stu1.getAge());
12 }
13 return i;
14 }
15 return 0;
16 }
17 };
18
19
20 Map<Student,Integer> treeMap = new TreeMap<>(comparator);
21 treeMap.put(new Student("aaa",12), 12);
22 treeMap.put(new Student("xxx",15), 56);
23 treeMap.put(new Student("fff",14), 111);
24 treeMap.put(new Student("hhh",15), 12);
25 treeMap.put(new Student("bbb",21), 89);
26 treeMap.put(new Student("bbb",19), 15);
27
28 Set entry=treeMap.entrySet();
29 for (Object obj:entry){
30 Map.Entry e=(Map.Entry)obj;
31 System.out.println(e);
32 }
33
34
35 }