javase-排序

 public class sort {
     public static void main(String[] args) {
         String[] arr = {"aa","bb","cc","dd"};
         System.out.println(Arrays.toString(arr));
 //        sort(arr);
 //        System.out.println(Arrays.toString(arr));
         Arrays.sort(arr);
         for (String string : arr) {
             System.out.print(string);
         }
     }

     private static void sort(String[] arr) {

         for (int i = 0; i < arr.length-1; i++) {
             for (int j = i+1; j < arr.length; j++) {
                 String temp = arr[i];
                 arr[i] = arr[j];
                 arr[j] = temp;
             }
         }
     }
 }