CollectionUtils 操作集
【CollectionUtils 操作集】package com.jakin.util;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang.ArrayUtils;
public class CollectionUtilsTest { @SuppressWarnings("unchecked") public static void main(String[] args) { List aList = new ArrayList();
aList.add("aaa");
aList.add("bbb");
aList.add("ccc");
List bList = new ArrayList();
bList.add("aaa");
bList.add("ddd");
bList.add("eee");
// 并集 Collection unionList = CollectionUtils.union(aList, bList);
// 交集 Collection intersectionList = CollectionUtils.intersection(aList, bList);
// 是否存在交集 boolean isContained = CollectionUtils.containsAny(aList, bList);
// 交集的补集 Collection disjunctionList = CollectionUtils.disjunction(aList, bList);
// 集合相减 Collection subtractList = CollectionUtils.subtract(aList, bList);
// 排序 Collections.sort((List) unionList);
Collections.sort((List) intersectionList);
Collections.sort((List) disjunctionList);
Collections.sort((List) subtractList);
// 测试 System.out.println("A: " + ArrayUtils.toString(aList.toArray()));
System.out.println("B: " + ArrayUtils.toString(bList.toArray()));
System.out.println("A has one of B? : " + isContained);
System.out.println("Union(A, B): " + ArrayUtils.toString(unionList.toArray()));
System.out.println("Intersection(A, B): " + ArrayUtils.toString(intersectionList.toArray()));
System.out.println("Disjunction(A, B): " + ArrayUtils.toString(disjunctionList.toArray()));
System.out.println("Subtract(A, B): " + ArrayUtils.toString(subtractList.toArray()));
} }
推荐阅读
- 2.6|2.6 Photoshop操作步骤的撤消和重做 [Ps教程]
- 图书集合完毕
- Activiti（一）SpringBoot2集成Activiti6
- MongoDB，Wondows下免安装版|MongoDB，Wondows下免安装版 （简化版操作）
- 雅集
- 在线版的迅捷思维导图怎么操作（）
- 操作系统|[译]从内部了解现代浏览器(1)
- 解读《摩根集团》（1）
- 私有化轻量级持续集成部署方案--03-部署web服务（下）
- 斐讯K2|斐讯K2 固件搜集