Swing Make Over

Swing Make Over merupakan tehnik memanipulasi tampilan aplikasi java gui (Swing) agar terlihat lebih keren dan sesuai dengan yang kita inginkan.  

Contoh :

• Button Swing Make Over
  Buat java class dengan nama sesuai selera misalnya dengan nama ButtonMakeOver. Sourcenya :
  
  import java.awt.Color;

  import java.awt.GradientPaint;

  import java.awt.Graphics;

  import java.awt.Graphics2D;

  import java.awt.RenderingHints;

  import javax.swing.ButtonModel;

  import javax.swing.JButton;

  public class ButtonMakeOver extends JButton {

      public ButtonMakeOver(String text) {

     setText(text);

          setBorderPainted(false);

          setContentAreaFilled(false);

          setFocusPainted(false);

          setOpaque(false);

          setForeground(Color.white);

      }

      @Override

      protected void paintComponent(Graphics g) {

          ButtonModel buttonModel = getModel();

          Graphics2D gd = (Graphics2D) g.create();

                  gd.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

                  gd.setPaint(new   GradientPaint(0,   0,   Color.white,   0, getHeight(), new Color(0, 0, 0, 0)));

          if (buttonModel.isRollover()) {

              gd.setPaint(new GradientPaint(0, 0, new Color(0, 0, 0, 0), 0, getHeight(), Color.white));

              if (buttonModel.isPressed()) {

                  gd.setPaint(new GradientPaint(0, 0, Color.white, 0, getHeight(), Color.white));

                  setForeground(Color.BLACK);

              } else {

                  setForeground(Color.white);

              }

          }

          gd.fillRoundRect(0, 0, getWidth(), getHeight(), 25, 25);

          gd.dispose();

          super.paintComponent(g);

      }

  }
  Tulis source codeberikut (Test.java) :
  
  import java.awt.BorderLayout;

  import java.awt.Color;

  import javax.swing.JFrame;

  import javax.swing.JPanel;

  public class Test extends JFrame {

      private ButtonMakeOver button =new ButtonMakeOver("My Button");

      private JPanel panel;

      public Test() {

          panel = new JPanel(null);

          panel.setBackground(Color.BLACK);

          panel.add(button);

          button.setBounds(20, 20, 120, 23);

          setLayout(new BorderLayout());

          add(panel, BorderLayout.CENTER);

          setSize(200,100);

          setDefaultCloseOperation(EXIT_ON_CLOSE);

      }

      public static void main(String[] args) {

          new Test().setVisible(true);

      }

  }
  Kemudian run project, dan lihat hasilnya.
  

source : http://itc.himatif.or.id
         http://eecchhoo.wordpress
 

Ajax

Pengerian Ajax
AJAX adalah singkatan dari Asynchronous JavaScript and XML. Pada dasarnya ajax menggunakan XMLHttpRequest object Javascript untuk membuat request ke server secara asynchronous atau tanpa melakukan refresh halaman website. Yang dibutuhkan agar ajax dapat berjalan adalah javascript harus di enable pada browser yang digunakan. Walaupun javascript merupakan dasar dari Ajax, dimana javascript sangat susah pada implementasi dan maintenance, tetapi Ajax memiliki struktur pemrograman yang lebih mudah untuk dipahami. Anda tinggal membuat object XMLHttpRequest dan memastikan object tersebut terbentuk dengan benar. Kemudian menentukan kemana hasilnya akan ditampilkan atau dikirim.


source: myphptutorials.com

Java Enkripsi

Buat file baru (file - new project - java application). Kemudian klik kanan package - pilih jframe form. Pertama, kita perlu membuat designnya di jframe form. Anda bisa mendesign sesuai selera. Misalnya designnya seperti ini : 

 Jika ingin memberi nama variabel, klik kanan button - change variabel.


codingnya : 

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * enskripsi1.java
 *
 * Created on 19 Jan 12, 12:02:55
 */
package enskripsi;

import javax.swing.*;
import java.io.*;
import java.io.IOException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author soyadina
 */
public class enskripsi1 extends javax.swing.JApplet {

    public String text, namafiletext;
    JFileChooser fc;
    File file;
    boolean fileBaru;
    boolean fileBaru1, buf;
    final String[] EXT = {(".csv")};
    final String[] EXT2 = {(".txt")};

    /** Initializes the applet enskripsi1 */
    @Override
    public void init() {
        fc = new JFileChooser();
        fc.addChoosableFileFilter(new jenisFile(EXT));
        fc.addChoosableFileFilter(new jenisFile(EXT2));

        fc.setAcceptAllFileFilterUsed(false);

        fileBaru = true;
        fileBaru1 = true;
        try {
            java.awt.EventQueue.invokeAndWait(new Runnable() {

                @Override
                public void run() {
                    initComponents();
                }
            });
        } catch (Exception ex) {
        }
    }

    private void msg(String pesan) {

        JOptionPane.showMessageDialog(this, pesan, "Informasi",
                JOptionPane.INFORMATION_MESSAGE);
    }

    private boolean okToReplace() {

        return (JOptionPane.showConfirmDialog(this, "File " + file.getName() + " Sudah Ada\n"
                + "Akan Ditimpa ?",
                "Peringatan", JOptionPane.YES_NO_OPTION) == 0);
    }

    private void SimpanFile() {
        PrintWriter pw = null;
        try {
            pw = new PrintWriter(new BufferedWriter(new FileWriter(file)));
        } catch (IOException e) {
            msg("Gagal Simpan File : '" + file.getName());
            return;
        }
        pw.print(isi.getText());
        pw.close();
        fileBaru = false;
    }

    private void SimpanFile1() {
        PrintWriter pw = null;
        try {
            pw = new PrintWriter(new BufferedWriter(new FileWriter(file)));
        } catch (IOException e) {
            msg("Gagal Simpan File : '" + file.getName());
            return;
        }
        pw.print(isi2.getText());
        pw.close();
        fileBaru1 = false;
    }

    private void setTitle(String string) {
        throw new UnsupportedOperationException("Not yet implemented");
    }

    class Enskripsimd5 {

        private String convertToHex(byte[] data) {
            StringBuffer buf = new StringBuffer();
            for (int i = 0; i < data.length; i++) {
                int halfbyte = (data[i] >>> 4) & 0x0F;
                int two_halfs = 0;
                do {
                    if ((0 <= halfbyte) && (halfbyte <= 9)) {
                        buf.append((char) ('0' + halfbyte));
                    } else {
                        //buf.append((char) ('a' + (halfbyte - (int) geser.getValue())));
                        Object a = geser.getValue();
                        buf.append('a' + (halfbyte - Integer.parseInt(a.toString())));
                    }
                    halfbyte = data[i] & 0x0F;
                } while (two_halfs++ < 1);
            }
            return buf.toString();
        }

        public String MD5(String text)
                throws NoSuchAlgorithmException, UnsupportedEncodingException {
            MessageDigest md;
            md = MessageDigest.getInstance("MD5");
            byte[] md5hash = new byte[32];
            md.update(text.getBytes("iso-8859-1"), 0, text.length());
            md5hash = md.digest();
            return convertToHex(md5hash);

        }
    }

    /** This method is called from within the init() method to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jPanel2 = new javax.swing.JPanel();
        browse2 = new javax.swing.JButton();
        save = new javax.swing.JButton();
        btnSaveAs = new javax.swing.JButton();
        geser = new javax.swing.JSpinner();
        jButton4 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        jButton1 = new javax.swing.JButton();
        jPanel3 = new javax.swing.JPanel();
        namafile1 = new javax.swing.JTextField();
        ubah = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        isi = new javax.swing.JTextPane();
        Cpass = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        random = new javax.swing.JButton();
        password2 = new javax.swing.JButton();
        jPanel4 = new javax.swing.JPanel();
        save2 = new javax.swing.JButton();
        jScrollPane2 = new javax.swing.JScrollPane();
        isi2 = new javax.swing.JTextPane();
        pass = new javax.swing.JTextField();
        password = new javax.swing.JButton();
        btnSaveAs1 = new javax.swing.JButton();
        jLabel4 = new javax.swing.JLabel();
        md52 = new javax.swing.JButton();
        random2 = new javax.swing.JButton();
        jMenuBar1 = new javax.swing.JMenuBar();
        jMenu1 = new javax.swing.JMenu();
        jMenuItem3 = new javax.swing.JMenuItem();
        jMenuItem8 = new javax.swing.JMenuItem();
        save3 = new javax.swing.JMenuItem();
        saveas2 = new javax.swing.JMenuItem();
        jMenuItem1 = new javax.swing.JMenuItem();
        jMenuItem2 = new javax.swing.JMenuItem();
        jMenu2 = new javax.swing.JMenu();
        jMenuItem4 = new javax.swing.JMenuItem();
        jMenuItem5 = new javax.swing.JMenuItem();
        jMenuItem6 = new javax.swing.JMenuItem();
        jMenuItem7 = new javax.swing.JMenuItem();

        jPanel1.setBackground(new java.awt.Color(0, 153, 153));
        jPanel1.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));

        jPanel2.setBackground(new java.awt.Color(0, 102, 102));
        jPanel2.setForeground(new java.awt.Color(204, 255, 255));
        jPanel2.setFont(new java.awt.Font("Comic Sans MS", 1, 11));

        browse2.setFont(new java.awt.Font("Arial Black", 0, 11));
        browse2.setText("browse");
        browse2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                browse2ActionPerformed(evt);
            }
        });

        save.setFont(new java.awt.Font("Arial Black", 0, 11)); // NOI18N
        save.setText("save");
        save.setEnabled(false);
        save.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                saveActionPerformed(evt);
            }
        });

        btnSaveAs.setFont(new java.awt.Font("Arial Black", 0, 11)); // NOI18N
        btnSaveAs.setText("save as");
        btnSaveAs.setEnabled(false);
        btnSaveAs.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSaveAsActionPerformed(evt);
            }
        });

        geser.setEnabled(false);

        jButton4.setFont(new java.awt.Font("Arial Black", 0, 11)); // NOI18N
        jButton4.setText("new");
        jButton4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton4ActionPerformed(evt);
            }
        });

        jLabel1.setFont(new java.awt.Font("Arial Black", 0, 11)); // NOI18N
        jLabel1.setText("geser");

        jButton1.setText("keluar");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addComponent(save)
                        .addGap(18, 18, 18)
                        .addComponent(btnSaveAs))
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addComponent(browse2)
                        .addGap(18, 18, 18)
                        .addComponent(jButton4)
                        .addGap(39, 39, 39)
                        .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jButton1)
                            .addGroup(jPanel2Layout.createSequentialGroup()
                                .addComponent(jLabel1)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                .addComponent(geser, javax.swing.GroupLayout.PREFERRED_SIZE, 38, javax.swing.GroupLayout.PREFERRED_SIZE)))))
                .addContainerGap(37, Short.MAX_VALUE))
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(browse2)
                    .addComponent(geser, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel1)
                    .addComponent(jButton4))
                .addGap(30, 30, 30)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(save)
                    .addComponent(btnSaveAs)
                    .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(56, Short.MAX_VALUE))
        );

        jPanel3.setBackground(new java.awt.Color(0, 102, 102));
        jPanel3.setFont(new java.awt.Font("Comic Sans MS", 1, 11));

        namafile1.setEnabled(false);

        ubah.setFont(new java.awt.Font("Arial", 0, 11)); // NOI18N
        ubah.setText("MD5");
        ubah.setEnabled(false);
        ubah.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                ubahActionPerformed(evt);
            }
        });

        isi.setEnabled(false);
        jScrollPane1.setViewportView(isi);

        Cpass.setFont(new java.awt.Font("Arial", 0, 11));
        Cpass.setForeground(new java.awt.Color(0, 51, 255));
        Cpass.setEnabled(false);

        jLabel2.setFont(new java.awt.Font("Arial", 0, 11)); // NOI18N
        jLabel2.setText("browse");

        random.setFont(new java.awt.Font("Arial", 0, 11)); // NOI18N
        random.setText("random");
        random.setEnabled(false);
        random.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                randomActionPerformed(evt);
            }
        });

        password2.setFont(new java.awt.Font("Arial", 0, 11));
        password2.setText("password");
        password2.setEnabled(false);
        password2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                password2ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
        jPanel3.setLayout(jPanel3Layout);
        jPanel3Layout.setHorizontalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel3Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 242, Short.MAX_VALUE)
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel3Layout.createSequentialGroup()
                        .addComponent(password2)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 44, Short.MAX_VALUE)
                        .addComponent(Cpass, javax.swing.GroupLayout.PREFERRED_SIZE, 115, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(jPanel3Layout.createSequentialGroup()
                        .addComponent(jLabel2)
                        .addGap(48, 48, 48)
                        .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel3Layout.createSequentialGroup()
                                .addComponent(ubah)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 34, Short.MAX_VALUE)
                                .addComponent(random))
                            .addComponent(namafile1, javax.swing.GroupLayout.DEFAULT_SIZE, 156, Short.MAX_VALUE))))
                .addContainerGap())
        );
        jPanel3Layout.setVerticalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel3Layout.createSequentialGroup()
                .addGap(13, 13, 13)
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(namafile1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel2))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(random)
                    .addComponent(ubah))
                .addGap(18, 18, 18)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 119, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(Cpass, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(password2))
                .addContainerGap(41, Short.MAX_VALUE))
        );

        jPanel4.setBackground(new java.awt.Color(0, 102, 102));
        jPanel4.setFont(new java.awt.Font("Comic Sans MS", 1, 11));

        save2.setFont(new java.awt.Font("Arial", 0, 11)); // NOI18N
        save2.setText("save");
        save2.setEnabled(false);
        save2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                save2ActionPerformed(evt);
            }
        });

        isi2.setEnabled(false);
        jScrollPane2.setViewportView(isi2);

        pass.setForeground(new java.awt.Color(0, 102, 255));
        pass.setEnabled(false);

        password.setFont(new java.awt.Font("Arial", 0, 11)); // NOI18N
        password.setText("password");
        password.setEnabled(false);
        password.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                passwordActionPerformed(evt);
            }
        });

        btnSaveAs1.setFont(new java.awt.Font("Arial", 0, 11)); // NOI18N
        btnSaveAs1.setText("save as");
        btnSaveAs1.setEnabled(false);
        btnSaveAs1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSaveAs1ActionPerformed(evt);
            }
        });

        jLabel4.setFont(new java.awt.Font("Arial", 0, 11)); // NOI18N
        jLabel4.setText("isi enskripsi");

        md52.setFont(new java.awt.Font("Arial", 0, 11)); // NOI18N
        md52.setText("MD5");
        md52.setEnabled(false);
        md52.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                md52ActionPerformed(evt);
            }
        });

        random2.setFont(new java.awt.Font("Arial", 0, 11)); // NOI18N
        random2.setText("random");
        random2.setEnabled(false);
        random2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                random2ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel4Layout = new javax.swing.GroupLayout(jPanel4);
        jPanel4.setLayout(jPanel4Layout);
        jPanel4Layout.setHorizontalGroup(
            jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel4Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel4Layout.createSequentialGroup()
                        .addComponent(password)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 67, Short.MAX_VALUE)
                        .addComponent(pass, javax.swing.GroupLayout.PREFERRED_SIZE, 127, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(jPanel4Layout.createSequentialGroup()
                        .addComponent(jLabel4)
                        .addGap(46, 46, 46)
                        .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                            .addComponent(save2, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(md52, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                        .addGap(27, 27, 27)
                        .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(btnSaveAs1)
                            .addComponent(random2)))
                    .addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 277, Short.MAX_VALUE))
                .addContainerGap())
        );
        jPanel4Layout.setVerticalGroup(
            jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel4Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(btnSaveAs1)
                    .addComponent(save2)
                    .addComponent(jLabel4))
                .addGap(11, 11, 11)
                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(random2, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(md52, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 117, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(25, 25, 25)
                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(password)
                    .addComponent(pass, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(45, Short.MAX_VALUE))
        );

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jPanel4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(35, Short.MAX_VALUE))
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                .addContainerGap(156, Short.MAX_VALUE)
                .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(149, 149, 149))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(27, 27, 27)
                .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(26, 26, 26)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jPanel4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addContainerGap())
        );

        jMenu1.setText("File");

        jMenuItem3.setText("new");
        jMenuItem3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem3ActionPerformed(evt);
            }
        });
        jMenu1.add(jMenuItem3);

        jMenuItem8.setText("open");
        jMenuItem8.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem8ActionPerformed(evt);
            }
        });
        jMenu1.add(jMenuItem8);

        save3.setText("save ");
        save3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                save3ActionPerformed(evt);
            }
        });
        jMenu1.add(save3);

        saveas2.setText("save as ");
        saveas2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                saveas2ActionPerformed(evt);
            }
        });
        jMenu1.add(saveas2);

        jMenuItem1.setText("save enskripsi");
        jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem1ActionPerformed(evt);
            }
        });
        jMenu1.add(jMenuItem1);

        jMenuItem2.setText("save as enskripsi");
        jMenuItem2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem2ActionPerformed(evt);
            }
        });
        jMenu1.add(jMenuItem2);

        jMenuBar1.add(jMenu1);

        jMenu2.setText("Enskripsi");

        jMenuItem4.setText("MD5");
        jMenuItem4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem4ActionPerformed(evt);
            }
        });
        jMenu2.add(jMenuItem4);

        jMenuItem5.setText("random");
        jMenuItem5.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem5ActionPerformed(evt);
            }
        });
        jMenu2.add(jMenuItem5);

        jMenuItem6.setText("MD5 enskripsi");
        jMenuItem6.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem6ActionPerformed(evt);
            }
        });
        jMenu2.add(jMenuItem6);

        jMenuItem7.setText("random enskripsi");
        jMenuItem7.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem7ActionPerformed(evt);
            }
        });
        jMenu2.add(jMenuItem7);

        jMenuBar1.add(jMenu2);

        setJMenuBar(jMenuBar1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(18, 18, 18)
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(246, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(42, Short.MAX_VALUE))
        );
    }// </editor-fold>

    private void browse2ActionPerformed(java.awt.event.ActionEvent evt) {                                       
        // TODO add your handling code here:

        JFileChooser fc = new JFileChooser();
        JFrame jf = new JFrame();
        int hasil = fc.showOpenDialog(this);
        fileBaru = false;
        if (hasil == JFileChooser.APPROVE_OPTION) {
            file = fc.getSelectedFile();
            try {
                isi.read(new FileInputStream(file), null);
            } catch (IOException e) {
                msg("Gagal Buka File : " + file.getName());
                return;
            }


            save.setEnabled(true);
            btnSaveAs.setEnabled(true);
            geser.setEnabled(true);
            namafile1.setEnabled(true);
            isi.setEnabled(true);
            geser.setEnabled(true);
            ubah.setEnabled(true);
            Cpass.setEnabled(true);
            random.setEnabled(true);
            password2.setEnabled(true);

            File file = fc.getSelectedFile();
            text = readFile(file);
            isi.setText(text);
            namafiletext = file.getPath().toString();
            namafile1.setText(namafiletext);

        }
        fileBaru = false;

    }                                      

    private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        save.setEnabled(true);
        btnSaveAs.setEnabled(true);
        geser.setEnabled(true);
        namafile1.setEnabled(true);
        isi.setEnabled(true);
        geser.setEnabled(true);
        ubah.setEnabled(true);
        Cpass.setEnabled(true);
        random.setEnabled(true);
        password2.setEnabled(true);

        isi.setText("");
        isi2.setText("");
        namafile1.setText("");
        isi.requestFocus();
        fileBaru = true;
    }                                       

    private void saveActionPerformed(java.awt.event.ActionEvent evt) {                                    
        // TODO add your handling code here:
        if (fileBaru) {
            btnSaveAs.doClick();
        } else {
            SimpanFile();
    }                                   
    }
        private void btnSaveAsActionPerformed(java.awt.event.ActionEvent evt) {                                         
            // TODO add your handling code here:
            if (fc.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
                file = fc.getSelectedFile();
                if (!file.exists() || okToReplace()) {
                    SimpanFile();
                }
            }
        }                                        

        private void ubahActionPerformed(java.awt.event.ActionEvent evt) {                                    
            // TODO add your handling code here:
            save2.setEnabled(true);
            password.setEnabled(true);
            pass.setEnabled(true);
            isi2.setEnabled(true);
            btnSaveAs1.setEnabled(true);
            md52.setEnabled(true);
            random2.setEnabled(true);

            Enskripsimd5 md5 = new Enskripsimd5();
            try {
                isi2.setText(md5.MD5(isi.getText()));

            } catch (NoSuchAlgorithmException ex) {
                Logger.getLogger(enskripsi1.class.getName()).log(Level.SEVERE, null, ex);
            } catch (UnsupportedEncodingException ex) {
                Logger.getLogger(enskripsi1.class.getName()).log(Level.SEVERE, null);
            }

        }                                   

    private void save2ActionPerformed(java.awt.event.ActionEvent evt) {                                     
        // TODO add your handling code here:
        if (fileBaru1) {
            btnSaveAs1.doClick();
        } else {
            SimpanFile1();
        }
    }                                    

    private void passwordActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        if (Cpass.getText().equals(pass.getText())) {
            msg("password anda benar : " + pass.getText());
            isi2.setText(isi.getText());
        } else {
            msg("password anda salah : " + pass.getText());
        }
    }                                       

    private void btnSaveAs1ActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        if (fc.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
            file = fc.getSelectedFile();
            if (!file.exists() || okToReplace()) {
                SimpanFile1();
            }
        }
    }                                         

    private void randomActionPerformed(java.awt.event.ActionEvent evt) {                                      
        // TODO add your handling code here:
        save2.setEnabled(true);
        password.setEnabled(true);
        pass.setEnabled(true);
        isi2.setEnabled(true);
        btnSaveAs1.setEnabled(true);
        md52.setEnabled(true);
        random2.setEnabled(true);
        String randomKey = "";
        double randomNumber;
        for (int i = 0; i < isi.getText().length(); i++) {
            randomNumber = Math.random() * 25 + 65;
            randomKey = randomKey + (char) randomNumber;
        }

        isi2.setText(randomKey);
    }                                     

    private void save3ActionPerformed(java.awt.event.ActionEvent evt) {                                     
        // TODO add your handling code here:
        if (fileBaru) {
            btnSaveAs.doClick();
        } else {
            PrintWriter pw = null;
            try {
                pw = new PrintWriter(new BufferedWriter(new FileWriter(file)));
            } catch (IOException e) {
                msg("Gagal Simpan File : '" + file.getName());
                return;
            }
            pw.print(isi.getText());
            pw.close();
            fileBaru = false;
        }
    }                                    

    private void saveas2ActionPerformed(java.awt.event.ActionEvent evt) {                                       
        // TODO add your handling code here:
        if (fc.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
            file = fc.getSelectedFile();
            if (!file.exists() || okToReplace()) {
                SimpanFile();
            }
        }
    }                                      

    private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        if (fileBaru) {
            btnSaveAs1.doClick();
        } else {
            PrintWriter pw = null;
            try {
                pw = new PrintWriter(new BufferedWriter(new FileWriter(file)));
            } catch (IOException e) {
                msg("Gagal Simpan File : '" + file.getName());
                return;
            }
            pw.print(isi2.getText());
            pw.close();
            fileBaru = false;
        }
    }                                         

    private void jMenuItem2ActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        if (fc.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
            file = fc.getSelectedFile();
            if (!file.exists() || okToReplace()) {
                SimpanFile1();
            }
        }
    }                                         

    private void password2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        if (pass.getText().equals(Cpass.getText())) {
            msg("password anda benar : " + Cpass.getText());
            isi.setText(isi2.getText());
        } else {
            msg("password anda salah : " + Cpass.getText());
        }
    }                                        

    private void md52ActionPerformed(java.awt.event.ActionEvent evt) {                                    
        // TODO add your handling code here:
        Enskripsimd5 md5 = new Enskripsimd5();
        try {
            isi.setText(md5.MD5(isi2.getText()));

        } catch (NoSuchAlgorithmException ex) {
            Logger.getLogger(enskripsi1.class.getName()).log(Level.SEVERE, null, ex);
        } catch (UnsupportedEncodingException ex) {
            Logger.getLogger(enskripsi1.class.getName()).log(Level.SEVERE, null);
        }
    }                                   

    private void random2ActionPerformed(java.awt.event.ActionEvent evt) {                                       
        // TODO add your handling code here:
        String randomKey = "";
        double randomNumber;
        for (int i = 0; i < isi2.getText().length(); i++) {
            randomNumber = Math.random() * 25 + 65;
            randomKey = randomKey + (char) randomNumber;
        }

        isi.setText(randomKey);
    }                                      

    private void jMenuItem3ActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        save.setEnabled(true);
        btnSaveAs.setEnabled(true);
        geser.setEnabled(true);
        namafile1.setEnabled(true);
        isi.setEnabled(true);
        geser.setEnabled(true);
        ubah.setEnabled(true);
        Cpass.setEnabled(true);
        random.setEnabled(true);
        password2.setEnabled(true);

        isi.setText("");
        isi2.setText("");
        namafile1.setText("");
        isi.requestFocus();
        fileBaru = true;
    }                                         

    private void jMenuItem4ActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        save2.setEnabled(true);
        password.setEnabled(true);
        pass.setEnabled(true);
        isi2.setEnabled(true);
        btnSaveAs1.setEnabled(true);
        md52.setEnabled(true);
        random2.setEnabled(true);

        Enskripsimd5 md5 = new Enskripsimd5();
        try {
            isi2.setText(md5.MD5(isi.getText()));

        } catch (NoSuchAlgorithmException ex) {
            Logger.getLogger(enskripsi1.class.getName()).log(Level.SEVERE, null, ex);
        } catch (UnsupportedEncodingException ex) {
            Logger.getLogger(enskripsi1.class.getName()).log(Level.SEVERE, null);
        }
    }                                         

    private void jMenuItem5ActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        save2.setEnabled(true);
        password.setEnabled(true);
        pass.setEnabled(true);
        isi2.setEnabled(true);
        btnSaveAs1.setEnabled(true);
        md52.setEnabled(true);
        random2.setEnabled(true);
        String randomKey = "";
        double randomNumber;
        for (int i = 0; i < isi.getText().length(); i++) {
            randomNumber = Math.random() * 25 + 65;
            randomKey = randomKey + (char) randomNumber;
        }

        isi2.setText(randomKey);
    }                                         

    private void jMenuItem6ActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        Enskripsimd5 md5 = new Enskripsimd5();
        try {
            isi.setText(md5.MD5(isi2.getText()));

        } catch (NoSuchAlgorithmException ex) {
            Logger.getLogger(enskripsi1.class.getName()).log(Level.SEVERE, null, ex);
        } catch (UnsupportedEncodingException ex) {
            Logger.getLogger(enskripsi1.class.getName()).log(Level.SEVERE, null);
        }
    }                                         

    private void jMenuItem7ActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        String randomKey = "";
        double randomNumber;
        for (int i = 0; i < isi2.getText().length(); i++) {
            randomNumber = Math.random() * 25 + 65;
            randomKey = randomKey + (char) randomNumber;
        }

        isi.setText(randomKey);
    }                                         

    private void jMenuItem8ActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        JFileChooser fc = new JFileChooser();
        JFrame jf = new JFrame();
        int hasil = fc.showOpenDialog(this);
        fileBaru = false;
        if (hasil == JFileChooser.APPROVE_OPTION) {
            file = fc.getSelectedFile();
            try {
                isi.read(new FileInputStream(file), null);
            } catch (IOException e) {
                msg("Gagal Buka File : " + file.getName());
                return;
            }


            save.setEnabled(true);
            btnSaveAs.setEnabled(true);
            geser.setEnabled(true);
            namafile1.setEnabled(true);
            isi.setEnabled(true);
            geser.setEnabled(true);
            ubah.setEnabled(true);
            Cpass.setEnabled(true);
            random.setEnabled(true);
            password2.setEnabled(true);

            File file = fc.getSelectedFile();
            text = readFile(file);
            isi.setText(text);
            namafiletext = file.getPath().toString();
            namafile1.setText(namafiletext);

        }
        fileBaru = false;

    }                                         

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        System.exit(0);
    }                                       
    private String readFile(File file) {
        String result = "";
        try {
            FileInputStream fis = new FileInputStream(file);
            BufferedInputStream bis = new BufferedInputStream(fis);
            DataInputStream dis = new DataInputStream(bis);
            while (dis.available() != 0) {
                result += dis.readLine() + "\n";
            }
        } catch (FileNotFoundException e) {
        } catch (IOException e) {
        }
        return result;
    }
    // Variables declaration - do not modify
    private javax.swing.JTextField Cpass;
    private javax.swing.JButton browse2;
    private javax.swing.JButton btnSaveAs;
    private javax.swing.JButton btnSaveAs1;
    private javax.swing.JSpinner geser;
    private javax.swing.JTextPane isi;
    private javax.swing.JTextPane isi2;
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton4;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenu jMenu2;
    private javax.swing.JMenuBar jMenuBar1;
    private javax.swing.JMenuItem jMenuItem1;
    private javax.swing.JMenuItem jMenuItem2;
    private javax.swing.JMenuItem jMenuItem3;
    private javax.swing.JMenuItem jMenuItem4;
    private javax.swing.JMenuItem jMenuItem5;
    private javax.swing.JMenuItem jMenuItem6;
    private javax.swing.JMenuItem jMenuItem7;
    private javax.swing.JMenuItem jMenuItem8;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JPanel jPanel3;
    private javax.swing.JPanel jPanel4;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JButton md52;
    private javax.swing.JTextField namafile1;
    private javax.swing.JTextField pass;
    private javax.swing.JButton password;
    private javax.swing.JButton password2;
    private javax.swing.JButton random;
    private javax.swing.JButton random2;
    private javax.swing.JButton save;
    private javax.swing.JButton save2;
    private javax.swing.JMenuItem save3;
    private javax.swing.JMenuItem saveas2;
    private javax.swing.JButton ubah;
    // End of variables declaration
}


selanjutnya, buat class baru, misalnya bernama jenisFile :



Codingya :

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package enskripsi;

import java.io.File;
import javax.swing.filechooser.FileFilter;
import javax.swing.filechooser.FileFilter;

/**
 *
 * @author soyadina
 */
class jenisFile extends FileFilter {

    private String[] s;

    jenisFile(String[] sArg) {
        s = sArg;
    }
// Tentukan file apa yang akan ditampilkan
    public boolean accept(File fArg) {
        if (fArg.isDirectory()) {
            return true;
        }
        for (int i = 0; i < s.length; ++i) {
            if (fArg.getName().toLowerCase().indexOf(s[i].toLowerCase()) > 0) {
                return true;
            }
        }
// selain kedua hal di atas, anggap false
        return false;
    }

    public String getDescription() {
        String tmp = "";
        for (int i = 0; i < s.length; ++i) {
            tmp += "*" + s[i] + " ";
        }
        return tmp;
    }
}

Selamat Mencoba !!