Reverse Integer (JAVA)

Reverse digits of an integer.

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

1  Public classSolution {2      Public intReverseintx) {3String str=x+ "";4         Booleanisneg=false;5         if(Str.charat (0) = = '-')6         {7Str=str.substring (1);8isneg=true;9         }Ten              One         //System.out.println (str); A         CharTemp=0; -         Char[] arr=New Char[Str.length ()]; -          the          for(intI=0;i<str.length (); i++) -         { -arr[i]=Str.charat (i); -         } +         //System.out.println (arrays.tostring (arr)); -          for(inti=0,j=arr.length-1;i<arr.length;i++,j--) +         { A             if(i<j) at             { -temp=Arr[i]; -arr[i]=Arr[j]; -arr[j]=temp; -             } -         } in         //System.out.println (arrays.tostring (arr)); -          to         //System.out.println (Integer.parseint (string.valueof (arr))); +         returnisneg==false? Integer.parseint (string.valueof (arr)):-Integer.parseint (string.valueof (arr)); -     } the}

Solution 2 fully illustrates what a lame programmer I am ... Cry...

1  Public intReverseintx) {2             intRes=0;3              while(x!=0)4             {5Res=res*10+x%10;6x/=10;7             }8             returnRes;9}

Reverse Integer (JAVA)