java ArrayList 排序

class SortByString implements Comparator<String> { public int compare(String s1, String s2) {  //return o1.length()-o2.length();  int  flag = -1;  int min = s1.length()<s2.length()?s1.length():s2.length();  for(int i=0;i<min;i++){   if(s1.charAt(i)<s2.charAt(i)){   flag = -1;   break;   }else{   flag = 1;   break;   }  }  return s1.length()-s2.length(); }}public void test(){List<String> strlists = new ArrayList<String>();strlists.add("c");strlists.add("abc");strlists.add("b");Collections.sort(strlists,new SortByString());}