求两数组中满足给定和的数对

 给定两个有序整型数组a和b，各有n个元素，求两个数组中满足给定和的数对， 即对a中元素i和b中元素j，满足i + j = s(s已知)

public class PairSummation {
    public static void execute(int[] a, int[] b, int s) {
        assert (a.length == b.length);
        int i = 0;
        int j = b.length - 1;
        int repeat = 0;

        while (i <= a.length - 1) {
            while (j >= 0) {
                int tmp = a[i] + b[j];
                if (tmp > s) {
                    j--;
                } else if (tmp == s) {
                    System.out.println("a[" + i + "]:" + a[i] + "  b[" + j + "]:" + b[j]);
                    j--;
                    repeat++;
                } else {
                    j += repeat;
                    repeat = 0;
                    break;
                }
            }
            i++;
        }
    }

    public static void main(String[] args) {
        int[] a = { 1, 1, 2, 2, 3, 4, 5 };
        int[] b = { 6, 7, 8, 9, 10, 10, 11 };

        PairSummation.execute(a, b, 11);
    }
}