Membuat Aplikasi CRUD Sederhana Menggunakan Java Netbeans - Mari Belajar Coding

Kamis, 12 Desember 2019

Membuat Aplikasi CRUD Sederhana Menggunakan Java Netbeans


Membuat Aplikasi CRUD Sederhana Menggunakan Java Netbeans

Selamat datang di blog Mari belajar coding. Kali ini kita kembali lagi belajar pemrograman java menggunakan NetBeans IDE. Jika tutorial sebelumnya kita pernah belajar membuat koneksi database antara mysql dengan java, tutorial ini kita akan belajar bagaimana membuat sebuah aplikasi desktop menggunakan java NetBeans untuk menyimpan mengubah menghapus dan menampilkan data ke tabel dari database mysql ke GUI NetBeans.

Pertama-tama buat database mysql. Dalam tutorial membuat aplikasi Crud java Netbeans, kita akan menggunakan database bernama penjualan dengan satu tabel bernama produk.

CREATE DATABASE `penjualan`;
USE `penjualan`;

CREATE TABLE `produk` (
`IDProduk` int(11) NOT NULL PRIMARY KEY AUTO_INCREMENT,
`KodeProduk` varchar(32) UNIQUE KEY,
`NamaProduk` varchar(255),
`Satuan` varchar(255),
`Harga` int(11),
`Stok` int(11) ,
`CreateDate` datetime 
);

Setelah database dibuat, selanjutnya buka aplikasi NetBeans IDE kemudian buat projek baru bernama Penjualan.
File->New Project->Java Application
Membuat Aplikasi CRUD Sederhana Menggunakan Java Netbeans

Klik kanan pada Package Penjualan, buat file java class bernama koneksi untuk menghubungkan aplikasi yang akan kita buat dengan database penjualan.
Membuat Aplikasi CRUD Sederhana Menggunakan Java Netbeans

File koneksi.java seperti dibawah ini.

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package penjualan;
import java.sql.*;
import javax.swing.JOptionPane;
/**
 *
 * @author Hp
 */
public class koneksi {
    private static Connection KoneksiDatabse;
    public static Connection koneksiDB() throws SQLException {
        try {
            String DB ="jdbc:mysql://localhost/penjualan";
            String user="root";
            String pass="";
            DriverManager.registerDriver(new com.mysql.jdbc.Driver());
            KoneksiDatabse = (Connection) DriverManager.getConnection(DB,user,pass);
        } catch (Exception e) {
            JOptionPane.showMessageDialog(null,"Tidak ada koneksi","Error",
            JOptionPane.INFORMATION_MESSAGE);
            System.err.println(e.getMessage());
            System.exit(0);
        }
         return KoneksiDatabse;
    }
}

Tambahkan library MySQL JDBC Driver, klik kanan pada folder libraries kemudian pilih add library.
Membuat Aplikasi CRUD Sederhana Menggunakan Java Netbeans

Membuat Aplikasi CRUD Sederhana Menggunakan Java Netbeans

Buat Interface GUI untuk menampilkan form produk dan tabel produk dengan cara klik kanan pada package Penjualan->New->JFrame Form.
Membuat Aplikasi CRUD Sederhana Menggunakan Java Netbeans

Simpan dengan nama class produk. Kemudian buat layout seperti gambar dibawah ini.
Membuat Aplikasi CRUD Sederhana Menggunakan Java Netbeans
Keterangan:
Untuk membuat header dan keterangan inputan form, pilih Label pada bagian Pallete di sisi kanan layout.
Untuk membuat inputan form, pilih textfield kecuali pada inputan Satuan pilih yang combobox. 
Untuk menambah item select pada combobox, klik kanan kemudian pilih properties->model
Ganti variabel name setiap textfield, combobox, button, dan tabel dengan cara klik kanan pilih Change Variabel Name.
File produk.java seperti dibawah ini.

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package penjualan;
import java.sql.*;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;
import java.util.Scanner;
import java.awt.*;
/**
 *
 * @author Hp
 */
public class produk extends javax.swing.JFrame {
    DefaultTableModel tabModel;
    ResultSet RsProduk=null;
    /**
     * Creates new form produk
     */
    public produk() {
        initComponents();
        
        Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize();
        Dimension frameSize=this.getSize();
        if(frameSize.height > screenSize.height){
        frameSize.height=screenSize.height;
        }
        if(frameSize.width > screenSize.width){
        frameSize.width=screenSize.width;
        }
        this.setLocation((screenSize.width - frameSize.width) / 2,
        (screenSize.height = screenSize.height) / 20); 
        
        //fungsi Tampil data dan set edit off dijalankan saat aplikasi di run
        tampilData();
        SetEditOff();
    }
    
    //fungsi untuk menampilkan data produk ke dalam tabel
    private void tampilData(){
        try{
            Object[] judul_kolom = {"Kode Barang", "Nama Barang", "Satuan", "Harga", "Stok", "Create Date"};
            tabModel=new DefaultTableModel(null,judul_kolom);
            TabelProduk.setModel(tabModel);
            
            Connection conn=(Connection)koneksi.koneksiDB();
            Statement stt=conn.createStatement();
            tabModel.getDataVector().removeAllElements();
            
            RsProduk=stt.executeQuery("SELECT * from produk ");  
            while(RsProduk.next()){
                Object[] data={
                    RsProduk.getString("KodeProduk"),
                    RsProduk.getString("NamaProduk"),
                    RsProduk.getString("Satuan"),
                    RsProduk.getString("Harga"),
                    RsProduk.getString("Stok"),
                    RsProduk.getString("CreateDate")         
                };
               tabModel.addRow(data);
            }                
        } catch (Exception ex) {
        System.err.println(ex.getMessage());
        }
        // disable button
        jButtonSave.setEnabled(false);
        jButtonUpdate.setEnabled(false);
        jButtonDelete.setEnabled(false);
        jButtonCancel.setEnabled(false);
    }
   
    //menampilkan data ke form saat data pada tabel di klik 
   void tblKeForm(){
        jTextKodeProduk.setText(tabModel.getValueAt(TabelProduk.getSelectedRow(),0)+"");
        jTextNama.setText(tabModel.getValueAt(TabelProduk.getSelectedRow(),1)+"");
        jComboBoxSatuan.setSelectedItem(tabModel.getValueAt(TabelProduk.getSelectedRow(),2)+"");
        jTextHarga.setText(tabModel.getValueAt(TabelProduk.getSelectedRow(),3)+"");
        jTextStok.setText(tabModel.getValueAt(TabelProduk.getSelectedRow(),4)+"");
        
        jButtonUpdate.setEnabled(true);
        jButtonDelete.setEnabled(true);
        jButtonCancel.setEnabled(true);
        jButtonSave.setEnabled(false);
    }
   
   //membersihkan form
   private void BersihData(){
        jTextKodeProduk.setText("");
        jTextNama.setText("");
        jComboBoxSatuan.setSelectedIndex(0);
        jTextHarga.setText(""); 
        jTextStok.setText("");
    } 
   
   //disable form
   private void SetEditOff(){
        jTextKodeProduk.setEnabled(false);
        jTextNama.setEnabled(false);
        jComboBoxSatuan.setEnabled(false);
        jTextHarga.setEnabled(false);
        jTextStok.setEnabled(false);
   }
   
   
   private void seteditOn(){
        jTextKodeProduk.setEnabled(true);
        jTextNama.setEnabled(true);
        jComboBoxSatuan.setEnabled(true);
        jTextHarga.setEnabled(true);
        jTextStok.setEnabled(true);
   }

    /**
     * This method is called from within the constructor 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() {

        jLabelHeader = new javax.swing.JLabel();
        jLabelKodeProduk = new javax.swing.JLabel();
        jTextKodeProduk = new javax.swing.JTextField();
        jLabelNama = new javax.swing.JLabel();
        jTextNama = new javax.swing.JTextField();
        jLabelSatuan = new javax.swing.JLabel();
        jComboBoxSatuan = new javax.swing.JComboBox();
        jLabelHarga = new javax.swing.JLabel();
        jTextHarga = new javax.swing.JTextField();
        jLabelStok = new javax.swing.JLabel();
        jTextStok = new javax.swing.JTextField();
        jButtonAdd = new javax.swing.JButton();
        jButtonSave = new javax.swing.JButton();
        jButtonUpdate = new javax.swing.JButton();
        jButtonDelete = new javax.swing.JButton();
        jButtonCancel = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        TabelProduk = new javax.swing.JTable();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabelHeader.setBackground(new java.awt.Color(0, 0, 51));
        jLabelHeader.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
        jLabelHeader.setForeground(new java.awt.Color(255, 255, 255));
        jLabelHeader.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabelHeader.setText("Data Produk");
        jLabelHeader.setOpaque(true);

        jLabelKodeProduk.setText("Kode Produk");

        jLabelNama.setText("Nama");

        jLabelSatuan.setText("Satuan");

        jComboBoxSatuan.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Pcs", "Dus", "Kg" }));

        jLabelHarga.setText("Harga");

        jLabelStok.setText("Stok");

        jButtonAdd.setText("AddNew");
        jButtonAdd.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButtonAddActionPerformed(evt);
            }
        });

        jButtonSave.setText("Save");
        jButtonSave.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButtonSaveActionPerformed(evt);
            }
        });

        jButtonUpdate.setText("Update");
        jButtonUpdate.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButtonUpdateActionPerformed(evt);
            }
        });

        jButtonDelete.setText("Delete");
        jButtonDelete.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButtonDeleteActionPerformed(evt);
            }
        });

        jButtonCancel.setText("Cancel");
        jButtonCancel.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButtonCancelActionPerformed(evt);
            }
        });

        TabelProduk.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null}
            },
            new String [] {
                "Title 1", "Title 2", "Title 3", "Title 4"
            }
        ));
        TabelProduk.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                TabelProdukMouseClicked(evt);
            }
        });
        jScrollPane1.setViewportView(TabelProduk);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jLabelHeader, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabelNama)
                    .addComponent(jLabelSatuan)
                    .addComponent(jLabelHarga)
                    .addComponent(jLabelStok)
                    .addComponent(jLabelKodeProduk))
                .addGap(14, 14, 14)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addGap(5, 5, 5)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                                    .addComponent(jTextHarga)
                                    .addComponent(jTextNama, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.PREFERRED_SIZE, 257, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addComponent(jComboBoxSatuan, 0, 259, Short.MAX_VALUE)
                                    .addComponent(jTextKodeProduk, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.PREFERRED_SIZE, 258, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addComponent(jTextStok)))
                            .addComponent(jButtonAdd))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 388, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jButtonSave)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jButtonUpdate)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addComponent(jButtonDelete)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jButtonCancel)))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jLabelHeader, javax.swing.GroupLayout.PREFERRED_SIZE, 37, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 180, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jTextKodeProduk, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabelKodeProduk))
                        .addGap(18, 18, 18)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jTextNama, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabelNama))
                        .addGap(18, 18, 18)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jComboBoxSatuan, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabelSatuan))
                        .addGap(18, 18, 18)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jTextHarga, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabelHarga))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jTextStok, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabelStok))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addComponent(jButtonAdd)))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButtonSave)
                    .addComponent(jButtonUpdate)
                    .addComponent(jButtonDelete)
                    .addComponent(jButtonCancel))
                .addGap(21, 21, 21))
        );

        pack();
    }// </editor-fold>                        
    //menangani proses saat button add di klik
    private void jButtonAddActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
        BersihData();
        jTextKodeProduk.requestFocus();
        jButtonSave.setEnabled(true);
        jButtonUpdate.setEnabled(false);
        jButtonDelete.setEnabled(false);
        seteditOn();
    }                                          

    //menangani proses saat button save di klik
    private void jButtonSaveActionPerformed(java.awt.event.ActionEvent evt) {                                            
        // TODO add your handling code here:
        String KodeProduk=jTextKodeProduk.getText();
        String NamaProduk=jTextNama.getText();
        String Satuan=jComboBoxSatuan.getSelectedItem().toString();
        String Harga=jTextHarga.getText();
        String Stok=jTextStok.getText();

        java.util.Date tanggal = new java.util.Date();
        java.text.SimpleDateFormat TanggalFormat= new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String CreateDate=TanggalFormat.format(tanggal);

        if (KodeProduk.isEmpty() ) {
            JOptionPane.showMessageDialog(null,"Kode produk tidak boleh kosong");
            jTextKodeProduk.requestFocus();
        }else if (NamaProduk.isEmpty()) {
            JOptionPane.showMessageDialog(null,"Nama produk tidak boleh kosong");
            jTextNama.requestFocus();
        }else if (Satuan.isEmpty()) {
            JOptionPane.showMessageDialog(null,"Satuan produk tidak boleh kosong");
            jComboBoxSatuan.requestFocus();
        }else if (Harga.isEmpty()) {
            JOptionPane.showMessageDialog(null,"Harga produk tidak boleh kosong");
            jTextHarga.requestFocus();
        }else if (Stok.isEmpty()) {
            JOptionPane.showMessageDialog(null,"Stok produk tidak boleh kosong");
            jTextStok.requestFocus();
        }
        else if (!(new Scanner(Harga).hasNextInt())) {
            JOptionPane.showMessageDialog(null,"Harga produk harus angka");
            jTextHarga.requestFocus();
        }else if (!(new Scanner(Stok).hasNextInt())) {
            JOptionPane.showMessageDialog(null,"Stok produk harus angka");
            jTextStok.requestFocus();
        }else{
            try{
                Connection conn=(Connection)koneksi.koneksiDB();
                Statement stt=conn.createStatement();
                stt.executeUpdate("insert into produk(KodeProduk,NamaProduk,Satuan,Harga,Stok,CreateDate)"+
                    "VALUES('"+KodeProduk+"','"+NamaProduk+"','"+Satuan+"','"+Harga+"','"+Stok+"','"+CreateDate+"')");
                BersihData();
                tampilData();
                SetEditOff();
                JOptionPane.showMessageDialog(this,"Data berhasil disimpan","Success",JOptionPane.INFORMATION_MESSAGE);
            } catch(SQLException e){
                JOptionPane.showMessageDialog(this,"Simpan data gagal\n"+e.getMessage(),"Error",JOptionPane.ERROR_MESSAGE);
            }
        }

    }                                           

    //menangani proses saat button Update di klik
    private void jButtonUpdateActionPerformed(java.awt.event.ActionEvent evt) {                                              
        // TODO add your handling code here:
        String KodeProduk=jTextKodeProduk.getText();
        String NamaProduk=jTextNama.getText();
        String Satuan=jComboBoxSatuan.getSelectedItem().toString();
        String Harga=jTextHarga.getText();
        String Stok=jTextStok.getText();

        java.util.Date tanggal = new java.util.Date();
        java.text.SimpleDateFormat TanggalFormat= new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String CreateDate=TanggalFormat.format(tanggal);

        if (KodeProduk.isEmpty() ) {
            JOptionPane.showMessageDialog(null,"Kode produk tidak boleh kosong");
            jTextKodeProduk.requestFocus();
        }else if (NamaProduk.isEmpty()) {
            JOptionPane.showMessageDialog(null,"Nama produk tidak boleh kosong");
            jTextNama.requestFocus();
        }else if (Satuan.isEmpty()) {
            JOptionPane.showMessageDialog(null,"Satuan produk tidak boleh kosong");
            jComboBoxSatuan.requestFocus();
        }else if (Harga.isEmpty()) {
            JOptionPane.showMessageDialog(null,"Harga produk tidak boleh kosong");
            jTextHarga.requestFocus();
        }else if (Stok.isEmpty()) {
            JOptionPane.showMessageDialog(null,"Stok produk tidak boleh kosong");
            jTextStok.requestFocus();
        }
        else if (!(new Scanner(Harga).hasNextInt())) {
            JOptionPane.showMessageDialog(null,"Harga produk harus angka");
            jTextHarga.requestFocus();
        }else if (!(new Scanner(Stok).hasNextInt())) {
            JOptionPane.showMessageDialog(null,"Stok produk harus angka");
            jTextStok.requestFocus();
        }else{
            try{
                Connection conn=(Connection)koneksi.koneksiDB();
                Statement stt=conn.createStatement();
                stt.executeUpdate("UPDATE produk SET NamaProduk='"+NamaProduk+"', Satuan='"+Satuan+"', Harga='"+Harga+"',"+
                    "Stok='"+Stok+"' WHERE KodeProduk='"+KodeProduk+"'");
                BersihData();
                tampilData();
                SetEditOff();
                JOptionPane.showMessageDialog(this,"Data berhasil diubah","Success",JOptionPane.INFORMATION_MESSAGE);
            } catch(SQLException e){
                JOptionPane.showMessageDialog(this,"Ubah data gagal\n"+e.getMessage(),"Error",JOptionPane.ERROR_MESSAGE);
            }
        }

    }                                             

    //menangani proses saat button delete di klik
    private void jButtonDeleteActionPerformed(java.awt.event.ActionEvent evt) {                                              
        // TODO add your handling code here:
        String KodeProduk=jTextKodeProduk.getText();

        if (KodeProduk.isEmpty() ) {
            JOptionPane.showMessageDialog(null,"Kode produk tidak boleh kosong");
            jTextKodeProduk.requestFocus();
        }else if(JOptionPane.showConfirmDialog(null,"Apakah anda yakin akan menghapus data ini?",
            "Informasi",JOptionPane.OK_CANCEL_OPTION,JOptionPane.INFORMATION_MESSAGE)==JOptionPane.OK_OPTION){
        try{
            Connection conn=(Connection)koneksi.koneksiDB();
            Statement stt=conn.createStatement();
            stt.executeUpdate("DELETE FROM produk WHERE KodeProduk='"+KodeProduk+"'");
            BersihData();
            tampilData();
            SetEditOff();
            JOptionPane.showMessageDialog(this,"Data berhasil di hapus","Success",JOptionPane.INFORMATION_MESSAGE);
        } catch(SQLException e){
            JOptionPane.showMessageDialog(this,"Delete data gagal\n"+e.getMessage(),"Error",JOptionPane.ERROR_MESSAGE);
        }
        }
    }                                             

    //menangani proses saat button cancel di klik
    private void jButtonCancelActionPerformed(java.awt.event.ActionEvent evt) {                                              
        // TODO add your handling code here:
        BersihData();
        jButtonSave.setEnabled(false);
        jButtonUpdate.setEnabled(false);
        jButtonDelete.setEnabled(false);
        SetEditOff();
    }                                             

    //menangani proses saat tabel produk di klik
    private void TabelProdukMouseClicked(java.awt.event.MouseEvent evt) {                                         
        // TODO add your handling code here:
        seteditOn();
        jTextKodeProduk.setEnabled(false);
        tblKeForm();
    }                                        

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(produk.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(produk.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(produk.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(produk.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new produk().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JTable TabelProduk;
    private javax.swing.JButton jButtonAdd;
    private javax.swing.JButton jButtonCancel;
    private javax.swing.JButton jButtonDelete;
    private javax.swing.JButton jButtonSave;
    private javax.swing.JButton jButtonUpdate;
    private javax.swing.JComboBox jComboBoxSatuan;
    private javax.swing.JLabel jLabelHarga;
    private javax.swing.JLabel jLabelHeader;
    private javax.swing.JLabel jLabelKodeProduk;
    private javax.swing.JLabel jLabelNama;
    private javax.swing.JLabel jLabelSatuan;
    private javax.swing.JLabel jLabelStok;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextField jTextHarga;
    private javax.swing.JTextField jTextKodeProduk;
    private javax.swing.JTextField jTextNama;
    private javax.swing.JTextField jTextStok;
    // End of variables declaration                   
}


Untuk menjalankan class produk pertama kali, klik kanan pada project penjualan->Properties->run->Main Class

Source Code:
Java Netbeans-Penjualan.zip

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