java 实现冒泡排序

public void bubbleSort(int[] arr) {
   boolean swapped = true;
   int j = 0;
   int tmp;
   while (swapped) {
      swapped = false;
      j++;
      for (int i = 0; i < arr.length - j; i++) {                                       
         if (arr[i] > arr[i + 1]) {                          
            tmp = arr[i];
            arr[i] = arr[i + 1];
            arr[i + 1] = tmp;
            swapped = true;
         }
      }                
   }
}