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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	private static void checkPalindrome(String i) {
  11. 		int left = 0;
  12.         int right = i.length() -1;
  13.         System.out.println("This word is: " + i);
  14.         System.out.println("Checking charAt(" + left + ") which is " +
  15.             i.charAt(left) + " and chartAt(" + right + ") which is " +
  16.             i.charAt(right));
  17.         while(i.charAt(left) == i.charAt(right) && right > left) {
  18.             left++; right--;
  19.             System.out.println("Checking charAt(" + left + ") which is " +
  20.                 i.charAt(left) + " and chartAt(" + right + ") which is " +
  21.                 i.charAt(right));
  22.         }
  23.  
  24.         System.out.println();
  25.         if (left < right)
  26.             System.out.println ("That string is Not a palindrome.");
  27.         else
  28.             System.out.println("That string IS a palindrome");
  29.         System.out.println();
  30. 	}
  31.  
  32. 	public static void main (String[] args) throws java.lang.Exception
  33. 	{
  34. 		checkPalindrome("racecar");
  35. 		checkPalindrome("abba");
  36. 		checkPalindrome("java");
  37. 	}
  38. }
Success #stdin #stdout 0.07s 380224KB
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stdin
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Standard input is empty
stdout
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This word is: racecar
Checking charAt(0) which is r and chartAt(6) which is r
Checking charAt(1) which is a and chartAt(5) which is a
Checking charAt(2) which is c and chartAt(4) which is c
Checking charAt(3) which is e and chartAt(3) which is e

That string IS a palindrome

This word is: abba
Checking charAt(0) which is a and chartAt(3) which is a
Checking charAt(1) which is b and chartAt(2) which is b
Checking charAt(2) which is b and chartAt(1) which is b

That string IS a palindrome

This word is: java
Checking charAt(0) which is j and chartAt(3) which is a

That string is Not a palindrome.
https://ideone.com/j7wU2S
language:
Java (12.0.1)
created:
12 years ago
visibility:
public

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