What is the output?

public static void swapValues(int x, int y) {
    int tmp;
    tmp = x;
    x = y;
    y = tmp;
}

public static void main(String args[]) {
    int p = 4, q = 3;
    swapValues(p, q);
    System.out.print("p = " + p + ", q = " + q);
}