下面是一个使用Set数据结构判断两个List是否存在重复项的示例代码: importjava.util.ArrayList;importjava.util.HashSet;importjava.util.List;importjava.util.Set;publicclassCompareTwoLists{publicstaticbooleanhasDuplicate(List<Integer>list1,List<Integer>list2){Set<Integer>set1=newHashSet<>(list1);Set<Intege...
在上面的示例中,我们首先创建了两个List对象list1和list2,并向它们添加了相同的元素。然后,我们定义了一个compareLists方法,用来比较这两个List是否具有相同的值。最后,在main方法中调用compareLists方法,并输出比较结果。 类图 CompareLists+boolean compareLists(List list1, List list2)List 在类图中,我们定义了一...
Learn tocompare two ArrayListin Java to find if they contain equal elements. If both lists are unequal, we will find thedifference between the lists. We will also learn to find common as well as different items in each list. Note that the difference between two lists is equal to a third...
Two lists are defined to be equal if they contain exactly the same elements, in the same order. 1. Using List.equals() method A simple solution to compare two lists of primitive types for equality is using the List.equals() method. It returns true if both lists have the same size, ...
Lists in Java are ordered by nature. So,two lists are considered to be equal if they contain the exact same elements in the same order.In this tutorial, we’ll see how to compare two Lists for equality in Java. We’ll also cover ways in which we can just compare the elements in two...
/*** 通过遍历两个List中按id属性相等的归结到resultList中* @param oneList 源list 1* @param twoList 源list 2* @param equalKeyName 相等的map键值*/public static List<Map<Object, Object>> compareListHitData(List<Map<Object, Object>> oneList, List<Map<Object, Object>> twoList, Object equal...
In this tutorial, first, we will compare two array lists using a comparison method in Java. We also apply the same method on Java strings before applying it on array lists. Finally, we demonstrate, how you can sort an unordered array list before comparis
toList()); return resultList; } /** * 通过遍历两个List中按id属性相等的归结到resultList中 * @param oneList 源list 1 * @param twoList 源list 2 * @param equalKeyName 相等的map键值 */ public static List<Map<Object, Object>> compareListHitData(List<Map<Object, Object>> oneList, List...
This quick tutorial demonstrated ways of testing if two Java Lists are equal. Two List implementations are considered equal when they have the same elements in the same order. We studied how to assert that the two Lists are the same or are equal using JUnit, TestNG, AssertJ, and plain Jav...
The difference method returns an instance of aSetcontaining the elements that exist only in the first instance and not in the other. Summary This tutorial taught us how to find the difference between two Lists in Java. We saw several examples of finding elements from a List that do not appe...