package com.ping; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; public class TestMain { public static <T extends Comparable<T>> boolean isEqualList(List<T> list1, List<T> list2){ if(list1 == null && list2 == null) { return true; } if(list1 == null || list2 == null) { return false; } if(list1.size() != list2.size()) { return false; } list1 = new ArrayList<T>(list1); list2 = new ArrayList<T>(list2); Collections.sort(list1); Collections.sort(list2); return list1.equals(list2); } public static void main(String[] args) { List<Integer> list1 = Arrays.asList(1, 2, 3, 3, 4); List<Integer> list2 = Arrays.asList(3, 2, 1, 4, 3); List<Integer> list3 = Arrays.asList(1, 2, 3, 4); List<Integer> list4 = Arrays.asList(1, 2, 3, 4, 5); List<String> list5 = Arrays.asList("张三","李四", "王五", "赵六"); List<String> list6 = Arrays.asList("张三","李四", "李四","王五"); System.out.println(isEqualList(list1, list2)); // true System.out.println(isEqualList(list1, list3)); // false System.out.println(isEqualList(list1, list4)); // false System.out.println(isEqualList(list5, list6)); // false } }