J2ME快速开平方根

/**      * 求平方根      * @param value 定义域      * @return 值域      */     final public static int sqrt(int value) {         int sqrt = 0;         for (int k = k = 0x40000000 ; k != 0; k >>= 2) {             int tmp = sqrt + k; sqrt >>= 1;             if (tmp <= value) {                 value -= tmp;                 sqrt += k;             }         }         return sqrt;     }