Java检查两个列表是否互斥

Question

Ok, I have List a and List b

is there a way to check that no value exist between the two?

List a // 1,2,4,5
List B // 1,6,7,8

Between both list // 1 FAILURE

Answer 1

Collections.disjoint(list1, list2)

如果它们没有共同的元素，则返回true 。

Answer 2

Use Collections.disjoint .

Returns true if the two specified collections have no elements in common

boolean hasCommonElements = Collections.disjoint(listA, listB);

Answer 3

You can use Collections.disjoint() :

public static boolean disjoint(Collection c1, Collection c2): Returns true if the two specified collections have no elements in common.

Code:

List<Integer> a = new ArrayList<Integer>();
List<Integer> b = new ArrayList<Integer>();

System.out.println(Collections.disjoint(a, b));

Answer 4

You have to user Collections.disjoint(a, b); It returns a boolean: true if the lists have no elements in common.