JAVA中Commons Collections - Intersection如何理解?
"用于获取两个集合(交集)之间的公共对象: console.log(import java.util.Arrays; import java.util.List; import org.apache.commons.collections4.CollectionUtils; public class CollectionUtilsTester { public static void main(String[] args) { //checking inclusion List<String> list1 = Arrays.asList(""A"",""A"",""A"",""C"",""B"",""B""); List<String> list2 = Arrays.asList(""A"",""A"",""B"",""B""); System.out.println(""List 1: "" + list1); System.out.println(""List 2: "" + list2); System.out.println(""Commons Objects of List 1 and List 2: "" + CollectionUtils.intersection(list1, list2)); } })
它将打印以下结果: console.log(List 1: [A, A, A, C, B, B] List 2: [A, A, B, B] Commons Objects of List 1 and List 2: [A, A, B, B])
资料来源:《Java工程师成神之路(基础篇)》,链接:https://developer.aliyun.com/topic/download?id=923"
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