List集合的排序操作

public static void main(String[] args) {
    //实例化ArrayList<String>使用泛型
    List<Integer> list1 = new ArrayList<Integer>();
    list1.addAll(List.of(1,3,2,4,6,5,8,7,4));
    List<String> list2=new ArrayList<String>();
    list2.addAll(List.of("java","php","c","jsp","mysql","servlet","filter"));
    //乱序
    //整型
    System.out.println(list1);
    Collections.shuffle(list1);
    System.out.println(list1);
    //字符串
    System.out.println(list2);
    Collections.shuffle(list2);
    System.out.println(list2);
    //默认升序
    //数字
    //Collections.sort(list1);
    list1.sort((a,b)->a-b);
    System.out.println(list1);
    //字符串
    System.out.println(list2);
    Collections.sort(list2);
    //按字符串长度
    list2.sort((a,b)->a.length()-b.length());
    System.out.println(list2);
    //降序
    //数字
    //Collections.sort(list1,Collections.reverseOrder());
    list1.sort((a,b)->b-a);
    System.out.println(list1);
    //字符串
    Collections.sort(list2,Collections.reverseOrder());
    //按字符串长度
    list2.sort((a,b)->b.length()-a.length());
    System.out.println(list2);

}