题解 | #整数反转#
整数反转
http://www.nowcoder.com/practice/6d366d8d3d5941729c5d3fdab55e02d1
import java.util.*;
public class Solution { public int reverse (int num) { String str = String.valueOf(num); if(str.length()>9) return 0; StringBuilder sb=new StringBuilder(); if(str.charAt(0)!='-'){ for (int i = str.length()-1; i >= 0; i--) { sb.append(str.charAt(i)); } }else { sb.append("-"); for (int i = str.length()-1; i >= 1; i--) { sb.append(str.charAt(i)); }
}
return Integer.parseInt(sb.toString());
}
}