List 匿名内部类排序

List<Integer> test = new ArrayList<Integer>();
		test.add(5);
		test.add(1);
		test.add(3);
		System.out.println(test);
		Collections.sort(test, new Comparator<Integer>(){
							@Override
							public int compare(Integer o1, Integer o2) {
								return o1-o2;
							}
			           });
		System.out.println(test);