Correct Answer; Find all triangle in array

VaildTriangle.java

import java.util.ArrayList;
import java.util.Arrays;

/**
 * Created by Readman on 8/1/14.
 */
public class VaildTriangle {
    /*
    >.< Eventually
    * */
    int answer = 0;

    public ArrayList<ArrayList<Integer>> valid2(int[] A) {
        ArrayList<ArrayList<Integer>> result = new ArrayList<ArrayList<Integer>>();
        Arrays.sort(A);
        for (int i = 0; i < A.length; ++i) {
            int k = i;
            for (int j = i; j < A.length; ++j) {
                while (k < A.length && A[i] + A[j] > A[k])
                    ++k;
                for (int l = j; l < k; l++) {
                    ArrayList<Integer> tmp = new ArrayList<Integer>();
                    tmp.add(A[i]);
                    tmp.add(A[j]);
                    tmp.add(A[l]);
                    result.add(tmp);
                }
            }
        }
        return result;
    }

    public static void main(String[] args) {
        VaildTriangle vaildTriangle = new VaildTriangle();
        int[] t = new int[]{1,2,3};
        ArrayList<ArrayList<Integer>> result2 = vaildTriangle.valid2(t);
        System.out.println(result2.size());
    }
}