Program java Caesar chiper

KODE CAESAR CHIPER

//**ADD** KODE

public class NewJFrame extends javax.swing.JFrame {

    /**

     * Creates new form NewJFrame

     */

    public NewJFrame() {

        initComponents();

    }

    public static void main(String args[]) {

        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {

                new NewJFrame().setVisible(true);

            }

        });

    }

//**

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         

K=Integer.parseInt(jTextField1.getText().trim());

plainText=Plain.getText();

cipherText=caesarCipher(plainText,K);

Cipher.setText(cipherText);

        // TODO add your handling code here:

}                                       

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                        

K=Integer.parseInt(jTextField1.getText().trim());

String cipherText=Cipher.getText();

oriText=dekripCipher(cipherText);

Original.setText(oriText);

        // TODO add your handling code here:

}                                       

private int K;

private String plainText,cipherText,oriText;

private char[]Kar={'A','B','C','D','E', 'F','G','H','I','J',

                   'K','L','M','N','O', 'P','Q','R','S','T',

                   'U','V','W','X','Y', 'Z'};

    // Variables declaration - do not modify                    

    private javax.swing.JTextArea Cipher;

    private javax.swing.JTextArea Original;

    private javax.swing.JTextArea Plain;

    private javax.swing.JButton jButton1;

    private javax.swing.JButton jButton2;

    private javax.swing.JLabel jLabel1;

    private javax.swing.JLabel jLabel2;

    private javax.swing.JLabel jLabel3;

    private javax.swing.JLabel jLabel4;

    private javax.swing.JScrollPane jScrollPane1;

    private javax.swing.JScrollPane jScrollPane2;

    private javax.swing.JScrollPane jScrollPane3;

    private javax.swing.JTextField jTextField1;

    // End of variables declaration                  

private String caesarCipher(String plainText, int K) {

String hasil="";

int[] KodeAsal=new int[26];

for(int i=0;i<plainText.length();i++){

    char C=plainText.charAt(i);

    if((C>='A')&&(C<='Z') ) C=Kar [ enkrip( C,K) ];

    hasil+=C;

   }

   return hasil;

}

 

private int enkrip(char c, int K )

    {  return (((int)c-65)+K)%26;

     }

private String dekripCipher(String cipherText) {

String hasil="";

for(int i=0;i<cipherText.length();i++)

{char D=cipherText.charAt(i);

     if((D>='A')&&(D<='Z') ) D=Kar [ dekrip( D,K) ];

    hasil+=D;

  }

  return hasil;

}

private int dekrip(char D, int K) {

    int pos=(int)D-65-K;

    if(pos<0)pos=pos+26;

        return( (pos)%26);

     }

   

}