LeetCode 7. Reverse Integer

Reverse digits of an integer.

Example1: x = 123, return 321
Example2: x = -123, return -321

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Note:
The input is assumed to be a 32-bit signed integer. Your function should return 0 when the reversed integer overflows.

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反转一个整数。

public class Solution {    public int reverse(int x) {        long a = 0;        while(x!=0){            a = a*10 + x%10;            x = x/10;        }        if(a>Integer.MAX_VALUE||a<Integer.MIN_VALUE){            return 0;        }        return (int)a;    }}