Comparator 간단하게 이용하기

@Test public void testComparator(){ List<Integer> lists = new ArrayList<>(); for(int i = 0 ; i < 10 ; i++){ lists.add((int)(Math.random()*100+i)); } lists.forEach(r->{System.out.print(r+",");}); System.out.println("====="); lists.sort(new Comparator<Integer>() { @Override public int compare(Integer o1, Integer o2) { return o1.compareTo(o2); } }); lists.forEach(r->{System.out.print(r+",");}); System.out.println("-------"); }

<결과>

89,82,19,35,52,18,16,16,70,104,=====

16,16,18,19,35,52,70,82,89,104,-------

​

​http://napsis.blog.me/221458894824