Java程序员面试宝典笔记——第八章（Java集合）

末蓝、 2024-04-19 00:25 73阅读 0赞

//1.对数组
    int[] arr = new int[]{1, 4, 3, 54};
    Arrays.sort(list);
    System.out.println(Arrays.toString(list));
    
    //2.对List<>
    ArrayList<Integer> list = new ArrayList<>();
    Collections.sort(list);
    System.out.println(list);
    
    //3.重写
    Collections.sort(list, new Comparator<Integer> () {
        @Override
        public int compare(Integer o1, Integer o2){
            return o2 - o1;
        }
    });

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