// Name:     Bradley Shedd
// Program:  Project#4ExtraCredit
// Date:     November 16, 2010
// Class:    Java1302
// Filename: Palindrome.java
// Purpose:  This class checks if the user did or
//           did not input a palindrome correctly.


   import java.awt.Graphics;
   import java.awt.Color;
   import java.awt.Font;

   public class Palindrome
   {
   // upper left cordinates of start of animation
      private static final int X_START = 100;
      private static final int Y_START = 50;
  
   // String representing the String
      private String pal;
   // boolean representing the exact result
      private boolean exactResult;
   // boolean representing the computed computed by the student
      private boolean result;
   // String array representing the various Strings
   // as they are called by the recursive method
      private String [] arrPal;
   // current index of arrPal
      int index;
  
   // animation started or not
      private boolean started = false;
   // exact result already computed or not
      private boolean resultSet = false;
  
      public Palindrome( String s )
      {
         pal = s;
         arrPal = new String[20];
         arrPal[0] = s;
         index = -1;
         exactResult = calcExactResult( pal );
         result = false;
      }
  
      public Palindrome( )
      {
         pal = "";
         arrPal = new String[20];
         index = -1;
         exactResult = false;
         result = false;
      }
  
      public void setResult( boolean r )
      {
         result = r;
         resultSet = true;
      }
  
      public void setPalString( String s )
      {
         pal = s;
         arrPal[0] = s;
         index = -1;
         resultSet = false;
         exactResult = calcExactResult( pal );
      }
  
      public String getPalString( )
      {
         return pal;
      }
  
      public void setStarted( boolean s )
      {
         started = s;
      }
 
      public boolean calcExactResult( String s )
      {
         if ( s.length( ) <= 1 )
            return true;
         else if ( s.substring( 0, 1 ).equalsIgnoreCase( s.substring( s.length( ) - 1, s.length( ) ) ) )
            return calcExactResult( s.substring( 1, s.length( ) - 1 ) );
         else
            return false;
      }
  
      public boolean getExactResult( )
      {
         return exactResult;
      }
  
      public void updatePalindrome( String newS )
      {
         index++;
         arrPal[index] = newS;
      }
  
      public String convertResult( boolean finalResult )
      {
         if ( finalResult )
            return " is a palindrome";
         else
            return " is not a palindrome";
      }
  
      public void draw( Graphics g )
      {
         String temp = "";
         if ( started )
         {
            g.setFont( new Font( "Courier", Font.PLAIN, 18 ) );
            g.setColor( Color.BLUE );
        
            for ( int i = 0; i <= index; i++ )
            {
               g.drawString( arrPal[i], X_START + 11 * i, Y_START + i * 20 );
            }
        
            if ( resultSet )
            {
               g.setFont( new Font( "Serif", Font.BOLD, 18 ) );
               g.setColor( Color.RED );
               g.drawString( "Your result is: " + pal + convertResult( result ), X_START / 4, Y_START + ( index + 2 ) * 20 );
               g.setColor( new Color( 0, 255, 127 ) );
               g.drawString( "The correct result is: " + pal + convertResult( exactResult ), X_START / 4, Y_START + ( index + 4 ) * 20 );
            }
         }
      }
  }

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