Reverse digits of an integer.
Example1: x = 123, return 321
Example2: x = -123, return -321
Note:
The input is assumed to be a 32-bit signed integer. Your function should return 0 when the reversed integer overflows.
public class Solution { public int reverse(int x) { int res=0; while(x!=0){ if(res>Integer.MAX_VALUE/10||res<Integer.MIN_VALUE/10){ return 0; } res=res*10+x%10; x/=10; } return res; } }
原文：http://www.cnblogs.com/sure0328/p/7153051.html