/** * 计算整数的位数 * @param x * @return */ public static int countIntegerLength(int x){ final int [] sizeTable = { 9, 99, 999, 9999, 99999, 999999, 9999999, 99999999, 999999999, Integer.MAX_VALUE }; for (int i=0; ; i++) if (x <= sizeTable[i]){ return i+1;…