Reverse Integer Java

Reverse digits of an integer.

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

 Key to solve:
    1. use long type to handle overflow that return 0 if overflow
    2. To handle negative case => always convert to negative to positive first

Check the coding in detail below:

public class Solution {    public int reverse(int x) {        boolean negSign=false;        //negetive case => alwyas convert to Positive first        if(x<0){            x=-x;            negSign=true;        }        //normal case        long reverseX=0;        int temp=x;        while(temp>0){            reverseX=reverseX*10+temp%10;            temp/=10;        }        //return 0 if overflow, instead of throw exception        if(reverseX>Integer.MAX_VALUE){            return 0;        }        return negSign?-(int)reverseX : (int)reverseX;    }}