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reverse integer

admin 11月 13, 2020 0

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.

Solution

public class  {
    public int reverse(int x) {
        int temp,value;
        long y = 0;
        value = Math.abs(x);
        while(value > 0) {
            temp = value%10;
            y = y*10+temp;
            value = value/10;
            if(y<Integer.MIN_VALUE || y > Integer.MAX_VALUE) return 0;
        }
        if(x < 0) y = -y;
        return (int)y;
    }
}