数组/List集合判断是否有交集--retainAll()
1.数组转为List集合
Arrays.asList(postCodeOld.split(","))
2.List集合转为HashSet集合
HashSet<String> set = new HashSet<String>(Arrays.asList(postCodeOld.split(",")));
3.
HashSet<String> set = new HashSet<String>(Arrays.asList(postCodeOld.split(",")));
4.判断
set.retainAll(Arrays.asList(postCodeNew.split(",")));
if(set.size() != 0){ result = false; }
源码: