JAVA基于Arrays.sort()实现数组升序和降序

@Test
  public void index4(){
    int scores[] = new int[]{1,2,3,89,4};
    Arrays.sort(scores);
    for (int i:scores
    ) {
      System.out.println(i);
    }
  }

@Test
  public void index5(){
    Integer scores[] = {1,2,3,89,4};
    Arrays.sort(scores,Collections.reverseOrder());
    for (Integer i:scores
    ) {
      System.out.println(i);
    }
  }

@Test
  public void index6(){
    int scores[] = new int[]{1,2,3,89,4};
    Integer newScores[] = new Integer [5];
    for(int i=0;i<scores.length;i++){
      newScores[i]= new Integer(scores[i]);
    }

    Arrays.sort(newScores,Collections.reverseOrder());
    for (Integer i:newScores
    ) {
      System.out.println(i);
    }
  }