public class Swapper {

    int stuff[] = { 15, 4, 9, 3, 0 };

    public static void main(String[] args) {
        new Swapper();
    }

    public Swapper() {
        swap(0, 1);

        for (int i = 0; i < stuff.length; i++) {
            System.out.print(stuff[i]);
            System.out.print(" ");
        }
    }

    public void swap(int i, int j) {
        stuff[i] = stuff[i] + stuff[j];
        stuff[j] = stuff[i] - stuff[j];
        stuff[i] = stuff[i] - stuff[j];
    }
}