hash算法取两数组中的相同元素

public static List<String> getSame2(String[] array_1,String[] array_2)
    {
        Arrays.sort(array_1);
        Arrays.sort(array_2);
       
        //相同元素集合
        List<String> sameList = new ArrayList<String>();
       
        int j = 0;
        int k = 0;
       
        int compareResult = 0;
        while(j < array_1.length && k< array_2.length)
        {
            /*
             *比较两个值大小
             *若是相等，则加入集合，反之则变动小一方的下标值
             */
            compareResult = array_1[j].compareTo(array_2[k]);
            if (0 == compareResult)
            {
                sameList.add(array_1[j]);
                k ++;
                j ++;
            }
            else if (0 < compareResult)
            {
                k ++;
            }
            else
            {
                j ++;
            }
            continue;
        }
       
        return sameList;
    }