LeetCode:Reverse Integer
Reverse digits of an integer.
Example1: x = 123, return 321
Example2: x = -123, return –321
这道题应该不用详细说了。比较简单。唯一的是要注意特殊值0.
public class Solution {
public int reverse(int x) {
StringBuilder sb = new StringBuilder();
if(x==0)return x;
else if(x<0)
{
sb.append('-');
}
x = Math.abs(x);
while(x != 0)
{
sb.append(x%10);
x = x/10;
}
String result = sb.toString();
return Integer.parseInt(result);
}
}