积累小结：java数组匹配判断,求交集

判断两个数组是否存在相同元素，就是求交集
交集的函数不就是retainAll，代码如下：

boolean has = false;
String[] strOne= {
    
    "c","b","a","d"};
String[] strTwo= {
    
    "a","b","d","g"};
HashSet<String> set = new HashSet<>(Arrays.asList(strOne));
set.retainAll(Arrays.asList(strTwo));
if(set.size() > 0){
    
    
    has =  true;
}