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  1.  class NextPallindrome {
  2.  
  3. 	public static void main(String[] argc){
  4. 		int num= 8646;
  5.           System.out.println(nextPanlindrome(num));
  6. 	}
  7.  
  8. 	/**
  9. 	 * Get next pallindrome
  10. 	 * @param num
  11. 	 * @return
  12. 	 */
  13. 	public static int nextPanlindrome(int num) {
  14.  
  15. 		if(isPalindrome(num))
  16. 			num++;
  17.  
  18. 		String temp = num + "";
  19. 		int end=temp.length() -1;
  20. 		int base=1;
  21.  
  22. 		for(int start = 0; start < end; start++, end--)
  23. 		{
  24.  
  25. 			// Gives the right digit
  26. 			int right = Integer.parseInt(temp.charAt(end)+"") * base;
  27.  
  28. 			// Gives the left digit
  29. 			int left = Integer.parseInt(temp.charAt(start)+"") * base;
  30.  
  31. 			// add differnce to the number
  32. 			num = num + left - right  ;		 //------(1)
  33.  
  34. 			base *=10;
  35.  
  36. 			if(right > left)
  37. 			{
  38. 				num += base;		// for incresing the value of number which got decreased at (1)
  39.  
  40. 				// previous step indroduces asymmetry if its a even number.
  41. 				if(start == end - 1)  // For even numbers eg. case 8468 (adjacent digits)
  42. 					num += base/10;
  43. 			}
  44. 			temp = num + "";
  45. 		}
  46.  
  47. 		return num;
  48. 	}
  49.  
  50.  
  51. 	public static boolean  isPalindrome(int num)	{
  52. 		int reverse = 0, temp=num;
  53.  
  54. 		while( temp != 0 )	{
  55. 			reverse = reverse * 10;
  56. 			reverse = reverse + temp%10;
  57. 			temp = temp/10;
  58. 		}
  59. 		return (num == reverse ? true: false);
  60. 	}
  61. }
  62.  
Success #stdin #stdout 0.06s 380224KB
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8668
https://ideone.com/Z5yVCz
language:
Java (12.0.1)
created:
10 years ago
visibility:
secret

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