1、差集 subtract

  	//数据准备
	List<Integer> list1 = Arrays.asList(1, 2, 5);
       List<Integer> list2 = Arrays.asList(0, 2, 5, 6);

//list1-list2差集(集合相减) list1扣除list2共同数据
   System.out.println(CollectionUtils.subtract(list1, list2));//[1]

   //list2-list1差集(集合相减) list2扣除list1共同数据
   System.out.println(CollectionUtils.subtract(list2, list1)); //[0, 6]

2、交集 intersection

   //数据准备
   List<Integer> list1 = Arrays.asList(1, 2, 5);
   List<Integer> list2 = Arrays.asList(0, 2, 5, 6);

//List1、List2交集
   System.out.println(CollectionUtils.intersection(list2, list1)); //[2, 5]

3、并集 union

   //数据准备
   List<Integer> list1 = Arrays.asList(1, 2, 5);
   List<Integer> list2 = Arrays.asList(0, 2, 5, 6);

//List1、List2并集
   System.out.println(CollectionUtils.union(list1, list2));//[0, 1, 2, 5, 6]

4、交集的补集 disjunction

  //数据准备
List<Integer> list1 = Arrays.asList(1, 2, 5);
   List<Integer> list2 = Arrays.asList(0, 2, 5, 6);
  
  //2个数组交集的补集
   System.out.println(CollectionUtils.disjunction(list1, list2));//[0, 1, 6]

5、集合是否相等 isEqualCollection

   //数据准备
List<Integer> list1 = Arrays.asList(1, 2, 5);
   List<Integer> list2 = Arrays.asList(0, 2, 5, 6);

//集合是否相等
   System.out.println(CollectionUtils.isEqualCollection(list1,list2));//false

   List<Integer> list3 = Arrays.asList(2, 5);
   List<Integer> list4 = Arrays.asList(5, 2);
   //集合是否相等
   System.out.println(CollectionUtils.isEqualCollection(list3,list4));//true

6、集合判空 isEmpty、isNotEmpty

   //数据准备
   List<Integer> list1 = Arrays.asList(1, 2, 5);
   List<Integer> list2 = Arrays.asList(0, 2, 5, 6);

//集合是否不为空
   System.out.println(CollectionUtils.isNotEmpty(list1));//true

   //集合为空判断
   System.out.println(CollectionUtils.isEmpty(list1));//false

7、是否全部包含 containsAll

   //数据准备
   List<Integer> list1 = Arrays.asList(1, 2, 5);
   List<Integer> list2 = Arrays.asList(0, 2, 5, 6);
   System.out.println(CollectionUtils.containsAll(list1,list2));//false	

List<Integer> list1 = Arrays.asList(1, 2, 5);
   List<Integer> list2 = Arrays.asList(0,1, 2,3, 5, 6);
   System.out.println(CollectionUtils.containsAll(list1,list2));//false
   System.out.println(CollectionUtils.containsAll(list2,list1));//true

List<Integer> list3 = Arrays.asList(2, 5);
   List<Integer> list4 = Arrays.asList(5, 2);

   System.out.println(CollectionUtils.containsAll(list3,list4));//true

8、是否任一包含 containsAny

   //数据准备
   List<Integer> list1 = Arrays.asList(1, 2, 5);
   List<Integer> list2 = Arrays.asList(0, 2, 5, 6);
   List<Integer> list3 = Arrays.asList(2, 5);
   List<Integer> list4 = Arrays.asList(5, 2);
   List<Integer> list5 = Arrays.asList(8, 9);

List<List<Integer>> all = Lists.newArrayList(Arrays.asList(1, 2, 5), Arrays.asList(2, 5));

   System.out.println(CollectionUtils.containsAny(all,list2,list1));//true
   System.out.println(CollectionUtils.containsAny(all,list2,list5));//false
   System.out.println(CollectionUtils.containsAny(list1,7,6));//false
   System.out.println(CollectionUtils.containsAny(list1,2,6));//true
   System.out.println(CollectionUtils.containsAny(list2,list1));//true

9、是否为子集 isSubCollection(coll1,coll2)

  
//判断coll1是否为coll2子集
List<Integer> list1 = Arrays.asList(1, 2, 5);
   List<Integer> list3 = Arrays.asList(2, 5);
   System.out.println(CollectionUtils.isSubCollection(list3,list1));//true