 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<String> aList = new ArrayList<String>();
aList.add("aaa");
aList.add("bbb");
aList.add("ccc");
List<String> bList = new ArrayList<String>();
bList.add("aaa");
bList.add("ddd");
bList.add("eee");
// 并集
Collection<String> unionList = CollectionUtils.union(aList, bList);
// 交集
Collection<String> intersectionList = CollectionUtils.intersection(aList, bList);
// 是否存在交集
boolean isContained = CollectionUtils.containsAny(aList, bList);
// 交集的補集
Collection<String> disjunctionList = CollectionUtils.disjunction(aList, bList);
// 集合相減
Collection<String> subtractList = CollectionUtils.subtract(aList, bList);
// 排序
Collections.sort((List<String>) unionList);
Collections.sort((List<String>) intersectionList);
Collections.sort((List<String>) disjunctionList);
Collections.sort((List<String>) subtractList);
// 測試
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()));
 }
 }
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