java数组排序

public void sortDropItems(List<ItemVO> dropItemVOs){
  ////排序，铜钱在最左边，其它的物品则按元宝价格从左到右升序
  if (dropItemVOs != null){
   Comparator<ItemVO> comparator = new Comparator<ItemVO>() {
    public int compare(ItemVO s1, ItemVO s2) {
     // 按元宝价格
     return s1.getYuanBao() - s2.getYuanBao();
    }
   };
   Collections.sort(dropItemVOs, comparator);// 正序
   // Collections.reverse(challengePeopleVOs);//倒序
   
  }
  

 }

//按两个元素排序

private static void sort2(List<RongYuScoreVO> lst){
Comparator<RongYuScoreVO> comparator = new Comparator<RongYuScoreVO>() {
public int compare(RongYuScoreVO s1, RongYuScoreVO s2) {
if (s1.getScore() != s2.getScore()){
return s1.getScore() - s2.getScore();
}
return s1.getFightForce() - s2.getFightForce();
}
};
Collections.sort(lst, comparator);
// Collections.reverse(lst);//倒序

}

输出结果为

for (RongYuScoreVO rongYuScoreVO : lst) {
System.out.println(rongYuScoreVO.getScore()+","+rongYuScoreVO.getFightForce());
}

1,2
1,23
4,1
4,11
4,13
5,23
6,23
6,66