Reverse Integer (JAVA)

 public class Solution {
     public int reverse(int x) {
         StringBuffer sb = new StringBuffer(x+"").reverse();   

         if(sb.charAt(sb.length()-1)=='-')
         {
             sb=new StringBuffer(sb.substring(0,sb.length()-1));
         }
         int res=0;
          try {
             res= Integer.parseInt(sb.toString());
         } catch (Exception e) {
             return 0;
         }
          return x>0?res:-res;
     }
 }

队列

if(x==Integer.MIN_VALUE)
                return 0;
        Queue queue=new LinkedList();
        int num=Math.abs(x);
        int res=0;
        while(num!=0)
        {
            queue.offer(num%10);
            num/=10;
        }
        while(!queue.isEmpty())
        {
             if(res>(Integer.MAX_VALUE-num%10)/10)
                    return 0;
            res=res*10+(int)queue.poll();
        }
         return x>0?res:-res;