判断一个int数组中的元素是否存在重复

public class Test{public static void main(String args[]){int a[] = {1, 2, 3, 4};System.out.println(isRepeat(a));}public static boolean isRepeat(int a[]){Set<Integer> set = new HashSet<Integer>(a.length);for (int x : a){set.add(x);}if (set.size() != a.length)return false;elsereturn true;}}