请教一下各位，要用数组，

public class A {
    public static void main(String args[]) {
        int a[] = {3,-1,0,3,10,6,6,-7,10,0,-1};
        int res = a[0];
        for(int i = 1;i < 11;i++){
            res ^= a[i];
        }
        System.out.println(res);
    }
}

```java
List<Integer> list = Arrays.asList(3, -1, 0, 3, 10, 6, 6, -7, 10, 0, -1, 9);
List<Integer> collect = list.stream().filter(t1 -> list.stream().filter(t2 -> t1.equals(t2)).count() <= 1).collect(Collectors.toList());
System.out.println(collect);

```