java - Palindrome ... i think the error is in my if statement because it keeps putting the output as 'it's not' -

most error in if statement, want if word not palindrome display it's not.

package palindrome; import java.util.scanner;  /**  *  * @author  */ public class palindrome {      /**      * @param args      *            command line arguments      */     public static void main(string[] args) {         integer length;         integer lasttofirst = 0;         integer firsttolast = 0;         boolean result = true;          string palindrome = ("");         scanner inputkey = new scanner(system.in);         system.out.print("enter word: ");         palindrome = inputkey.nextline();         char[] newword = palindrome.tochararray();         length = palindrome.length();          system.out.println("the length is: " + length);          if (newword[firsttolast] == newword[lasttofirst]) {             firsttolast = lasttofirst + 1;         }          if (firsttolast == lasttofirst) {             lasttofirst = firsttolast + 1;             // result = true;         }          if (newword[lasttofirst] == newword[firsttolast]) {             firsttolast = lasttofirst + 1;             system.out.println("it palindrome ");         } else {             system.out.println(" it's not");         }     } } 

you start with:

integer lasttofirst = 0; integer firsttolast = 0; 

and check:

if (newword[firsttolast] == newword[lasttofirst]) 

which true; set:

firsttolast = lasttofirst + 1; 

and check:

if (firsttolast == lasttofirst) 

which false (since 1 != 0) , check if:

if (newword[lasttofirst] == newword[firsttolast]) 

which equivalent of:

if (newword[0] == newword[1]) 

so, true if first 2 characters same.

the conclusion is: aren't checking if palindrome @ all, doing checking first 2 characters.

i like:

import java.util.scanner;  public class palindrome {     public static boolean ispalindrome( final string string ){         if ( string == null )             return false;         ( int = 0, j = string.length() - 1; < j; i++, j-- ){             if ( string.charat(i) != string.charat(j) )                 return false;         }         return true;     }      public static void main( final string[] args ){         string input;         final scanner scanner = new scanner( system.in );         while ( (input = scanner.nextline()).length() > 0 ){             system.out.println( ispalindrome( input ) );         }     } }