How to swap the values of 2 parameters in method Java

Question

i want to swap the values of 'a' and 'b' and to return their values. I tried void type but it didnt swap the values. Now im trying this but eclipse saying that i didnt use 'return'.

public class swap {
    public static int swap(int a, int b) {
        int temp = a;
        a = b;
        b = temp;
        int[] array = { a, b };

        for (int i = 0; i < array.length; i++) {
            return array[i];
        }

    }

    public static void main(String[] args) {
        System.out.println(swap(10, 5));

    }

}