Java NetBeans (โปรแกรมฟรีๆดีๆที่ใครส่วนมากชอบเขียนกัน)

Version 8.0.2

 

ขอเชิญสมัครชมรมคนรักภาษา Java Netbeans ผมจะอัฟเดทการส่งไฟล์ข้อมูลและเฟ้นหาทีมงานเพื่อพัฒนาซอร์ฟแวร์เพื่อคนไทยด้วยกันโดยไม่มีค่าใช้จ่ายๆใดๆ เพียงแต่ต้องการหาเพื่อนและทีมงานที่ชอบโปรแกรมฟรี ๆ และดีๆ สักตัวไว้พูดคุยกันหรือติดปัญหาการเขียนจาวาก็พูดคุยกันได้

 

ทีเขียนมาส่วนมากจะยึดติดค่าย Visual Studio มากเกินไปและข้อเสียเขามีค่าลิขสิทธิ์ผมเลยหันมาจับโปรแกรม Java ดีกว่าเพราะเขาฟรี ๆ และอีกอย่างถ้าหากใช้ ฐานข้อมูล MySQL แล้วผมคิดว่าองค์กรที่คุณเลือกหาน่าจะเลือกตัวคุณแล้วล่ะ

 

จะเริ่มฝึกเขียน Java ตั้งแต่ไม่เป็นเลยจนถึงขั้นที่ว่า Advance
===============================
เขียนแบบไม่มี Class เลย หรือเขียนแบบมี Class หรือเขียนแบบประยุกต์ตรงตามงาน

 

ผมจะเปรียบเทียบอะไรให้ดูครับ
===========================
หากท่านเลือกค่าย Visual Studio (VB.NET,C#.NET,C++.NET,F#.NET) แล้วเลือกฐานข้อมูล MS Access ,MS SQL Server ผมยังบอกเลยว่าติดที่ค่าลิขสิทธิตั้งแต่โปรแกรมเขียนแล้วยังพ่วงมาถึงฐานข้อมูลอีกเพราะเขาคิดค่าลิขสิทธิ์
===========================
ส่วนใครเลือก Java แล้วเลือกฐานข้อมูล MySQL ผมว่าดีทั้งนั้น เขาฟรีลิขสิทธิ์แต่บางคนมองว่าเอกสารเปเปอร์มีน้อย ไม่เป็นไรครับ หากสมัครเข้ามา ผมคิดว่าคนไทย คงต้องมีอะไรดีๆ อยู่ในสมองของแต่ละคนอยากส่งข้อมูลดีๆให้เพื่อนได้แน่นอน ใช่ไหมครับ

 

ผมจะยกตัวอย่างอะไรให้ดูครับ อย่างโปรแกรมที่โรงพยาบาลทั่วประเทศทำไมเขาถึงใช้ฐานข้อมูล MySQL กันล่ะครับ ทั้งที่เขามีเงินมากมายสามารถซื้อลิขสิทธิ์ SQL Server ได้เลยทำไมโปรแกรมเมอร์ถึงเลือก MySQL คิดเหมือนผมไหมครับ

 

ผมซื้อหนังสือ java ฉบับสมบูรณ์ เล่มที่ 2 ของ ผศ.สุดา เธียรมนตรี ราคา 299 บาท
มาอ่านยังเข้าใจยากอยู่เลย เพราะเขาเขียนแบบดั้งเดิมคือ text mode ผมเลยหาวิธีที่เขียนแบบง่ายมากกว่านี้มาเขียนถึงเข้าใจได้
================================
ปัจจุบันโทรศัพท์ รุ่นที่ใช้ Android เขาก็ใช้ Java เขียนกันจำลองโปรแกรมทาง Netbeans กันเยอะอยู่ครับ

 

ตัวอย่าง ใช้ฐานข้อมูล MS Access 2010 หรือ MS Access 2003 เป็นไกด์นำทางก่อน

 

1.ก่อนอื่นต้องไปดาวน์โหลด ไฟล์ตามรูปก่อนน่ะครับเพราะใช้ connect database,sql query,warning

 

2.ออกแบบฐานข้อมูลและlogin

 

3.Design Java Netbeans
Login และ FormAdd

 

4.Design Java Netbeans
Login และ FormAdd

 

5.Code Java Login
=======================
<pre class="java5" style="font-family:monospace;"><span style="color: #666666; font-style: italic;">/*
* 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.
*/</span>
<span style="color: #000000; font-weight: bold;">package</span> <span style="color: #006699;">com.java.myapp</span><span style="color: #339933;">;</span>
&nbsp;
<span style="color: #000000; font-weight: bold;">import</span> <span style="color: #006699;">java.awt.event.KeyEvent</span><span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">import</span> <span style="color: #006699;">java.sql.Connection</span><span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">import</span> <span style="color: #006699;">java.sql.DriverManager</span><span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">import</span> <span style="color: #006699;">javax.swing.JOptionPane</span><span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">import</span> <span style="color: #006699;">java.sql.Statement</span><span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">import</span> <span style="color: #006699;">java.sql.PreparedStatement</span><span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">import</span> <span style="color: #006699;">java.sql.ResultSet</span><span style="color: #339933;">;</span>
<span style="color: #008000; font-style: italic; font-weight: bold;">/**
*
* @author BBCOM
*/</span>
<span style="color: #000000; font-weight: bold;">public</span> <span style="color: #000000; font-weight: bold;">class</span> FormLogin <span style="color: #000000; font-weight: bold;">extends</span> javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">JFrame</span> <span style="color: #009900;">{</span>
&nbsp;
<span style="color: #003399; font-weight: bold;">Statement</span> st = <span style="color: #006600; font-weight: bold;">null</span><span style="color: #339933;">;</span>
<span style="color: #003399; font-weight: bold;">Connection</span> connect = <span style="color: #006600; font-weight: bold;">null</span><span style="color: #339933;">;</span>
<span style="color: #003399; font-weight: bold;">PreparedStatement</span> pstmt = <span style="color: #006600; font-weight: bold;">null</span><span style="color: #339933;">;</span>
<span style="color: #003399; font-weight: bold;">ResultSet</span> rs = <span style="color: #006600; font-weight: bold;">null</span><span style="color: #339933;">;</span>
<span style="color: #008000; font-style: italic; font-weight: bold;">/**
* Creates new form FormLogin
*/</span>
<span style="color: #000000; font-weight: bold;">public</span> FormLogin<span style="color: #009900;">(</span><span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
initComponents<span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">this</span>.<span style="color: #006633;">setLocationRelativeTo</span><span style="color: #009900;">(</span><span style="color: #006600; font-weight: bold;">null</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
setTitle<span style="color: #009900;">(</span><span style="color: #0000ff;">&quot;เข้าสู่โปรแกรมช่วยเหลือผู้ประสบปัญหาทางสังคม&quot;</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
&nbsp;
<span style="color: #000000; font-weight: bold;">try</span>
<span style="color: #009900;">{</span>
connect=<span style="color: #003399; font-weight: bold;">DriverManager</span>.<span style="color: #006633;">getConnection</span><span style="color: #009900;">(</span><span style="color: #0000ff;">&quot;jdbc:ucanaccess://C:<span style="color: #000099; font-weight: bold;">\\</span>java<span style="color: #000099; font-weight: bold;">\\</span>dbHelp.mdb&quot;</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span>
<span style="color: #000000; font-weight: bold;">catch</span><span style="color: #009900;">(</span><span style="color: #003399; font-weight: bold;">Exception</span> ex<span style="color: #009900;">)</span><span style="color: #009900;">{</span>
<span style="color: #003399; font-weight: bold;">JOptionPane</span>.<span style="color: #006633;">showMessageDialog</span><span style="color: #009900;">(</span><span style="color: #006600; font-weight: bold;">null</span>,<span style="color: #0000ff;">&quot;Connect Database Failed!<span style="color: #000099; font-weight: bold;">\n</span>&quot;</span>+ex.<span style="color: #006633;">getMessage</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span>
<span style="color: #009900;">}</span>
&nbsp;
<span style="color: #008000; font-style: italic; font-weight: bold;">/**
* 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.
*/</span>
@<span style="color: #003399; font-weight: bold;">SuppressWarnings</span><span style="color: #009900;">(</span><span style="color: #0000ff;">&quot;unchecked&quot;</span><span style="color: #009900;">)</span>
<span style="color: #666666; font-style: italic;">// &lt;editor-fold defaultstate=&quot;collapsed&quot; desc=&quot;Generated Code&quot;&gt; </span>
<span style="color: #000000; font-weight: bold;">private</span> <span style="color: #006600; font-weight: bold;">void</span> initComponents<span style="color: #009900;">(</span><span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
&nbsp;
txtUserName = <span style="color: #000000; font-weight: bold;">new</span> javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">JTextField</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
jLabel1 = <span style="color: #000000; font-weight: bold;">new</span> javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">JLabel</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
jLabel2 = <span style="color: #000000; font-weight: bold;">new</span> javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">JLabel</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
btnOK = <span style="color: #000000; font-weight: bold;">new</span> javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">JButton</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
btnRefresh = <span style="color: #000000; font-weight: bold;">new</span> javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">JButton</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
txtPassword = <span style="color: #000000; font-weight: bold;">new</span> javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">JPasswordField</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
&nbsp;
setDefaultCloseOperation<span style="color: #009900;">(</span>javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">WindowConstants</span>.<span style="color: #006633;">EXIT_ON_CLOSE</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
&nbsp;
jLabel1.<span style="color: #006633;">setText</span><span style="color: #009900;">(</span><span style="color: #0000ff;">&quot;User Name :&quot;</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
&nbsp;
jLabel2.<span style="color: #006633;">setText</span><span style="color: #009900;">(</span><span style="color: #0000ff;">&quot;Password :&quot;</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
&nbsp;
btnOK.<span style="color: #006633;">setText</span><span style="color: #009900;">(</span><span style="color: #0000ff;">&quot;OK&quot;</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
btnOK.<span style="color: #006633;">addActionListener</span><span style="color: #009900;">(</span><span style="color: #000000; font-weight: bold;">new</span> java.<span style="color: #006633;">awt</span>.<span style="color: #006633;">event</span>.<span style="color: #003399; font-weight: bold;">ActionListener</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
<span style="color: #000000; font-weight: bold;">public</span> <span style="color: #006600; font-weight: bold;">void</span> actionPerformed<span style="color: #009900;">(</span>java.<span style="color: #006633;">awt</span>.<span style="color: #006633;">event</span>.<span style="color: #003399; font-weight: bold;">ActionEvent</span> evt<span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
btnOKActionPerformed<span style="color: #009900;">(</span>evt<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span>
<span style="color: #009900;">}</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
&nbsp;
btnRefresh.<span style="color: #006633;">setText</span><span style="color: #009900;">(</span><span style="color: #0000ff;">&quot;Refresh&quot;</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
btnRefresh.<span style="color: #006633;">addActionListener</span><span style="color: #009900;">(</span><span style="color: #000000; font-weight: bold;">new</span> java.<span style="color: #006633;">awt</span>.<span style="color: #006633;">event</span>.<span style="color: #003399; font-weight: bold;">ActionListener</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
<span style="color: #000000; font-weight: bold;">public</span> <span style="color: #006600; font-weight: bold;">void</span> actionPerformed<span style="color: #009900;">(</span>java.<span style="color: #006633;">awt</span>.<span style="color: #006633;">event</span>.<span style="color: #003399; font-weight: bold;">ActionEvent</span> evt<span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
btnRefreshActionPerformed<span style="color: #009900;">(</span>evt<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span>
<span style="color: #009900;">}</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
&nbsp;
txtPassword.<span style="color: #006633;">addKeyListener</span><span style="color: #009900;">(</span><span style="color: #000000; font-weight: bold;">new</span> java.<span style="color: #006633;">awt</span>.<span style="color: #006633;">event</span>.<span style="color: #003399; font-weight: bold;">KeyAdapter</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
<span style="color: #000000; font-weight: bold;">public</span> <span style="color: #006600; font-weight: bold;">void</span> keyPressed<span style="color: #009900;">(</span>java.<span style="color: #006633;">awt</span>.<span style="color: #006633;">event</span>.<span style="color: #003399; font-weight: bold;">KeyEvent</span> evt<span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
txtPasswordKeyPressed<span style="color: #009900;">(</span>evt<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span>
<span style="color: #009900;">}</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
&nbsp;
javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span> layout = <span style="color: #000000; font-weight: bold;">new</span> javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span><span style="color: #009900;">(</span>getContentPane<span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
getContentPane<span style="color: #009900;">(</span><span style="color: #009900;">)</span>.<span style="color: #006633;">setLayout</span><span style="color: #009900;">(</span>layout<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
layout.<span style="color: #006633;">setHorizontalGroup</span><span style="color: #009900;">(</span>
layout.<span style="color: #006633;">createParallelGroup</span><span style="color: #009900;">(</span>javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">Alignment</span>.<span style="color: #006633;">LEADING</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addGroup</span><span style="color: #009900;">(</span>layout.<span style="color: #006633;">createSequentialGroup</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addGap</span><span style="color: #009900;">(</span><span style="color: #cc66cc;">58</span>, <span style="color: #cc66cc;">58</span>, <span style="color: #cc66cc;">58</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addGroup</span><span style="color: #009900;">(</span>layout.<span style="color: #006633;">createParallelGroup</span><span style="color: #009900;">(</span>javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">Alignment</span>.<span style="color: #006633;">LEADING</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addComponent</span><span style="color: #009900;">(</span>jLabel1, javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">PREFERRED_SIZE</span>, <span style="color: #cc66cc;">82</span>, javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">PREFERRED_SIZE</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addComponent</span><span style="color: #009900;">(</span>jLabel2, javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">PREFERRED_SIZE</span>, <span style="color: #cc66cc;">69</span>, javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">PREFERRED_SIZE</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addGap</span><span style="color: #009900;">(</span><span style="color: #cc66cc;">33</span>, <span style="color: #cc66cc;">33</span>, <span style="color: #cc66cc;">33</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addGroup</span><span style="color: #009900;">(</span>layout.<span style="color: #006633;">createParallelGroup</span><span style="color: #009900;">(</span>javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">Alignment</span>.<span style="color: #006633;">LEADING</span>, <span style="color: #006600; font-weight: bold;">false</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addGroup</span><span style="color: #009900;">(</span>javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">Alignment</span>.<span style="color: #006633;">TRAILING</span>, layout.<span style="color: #006633;">createSequentialGroup</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addComponent</span><span style="color: #009900;">(</span>btnOK, javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">DEFAULT_SIZE</span>, <span style="color: #cc66cc;">65</span>, <span style="color: #003399; font-weight: bold;">Short</span>.<span style="color: #006633;">MAX_VALUE</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addGap</span><span style="color: #009900;">(</span><span style="color: #cc66cc;">18</span>, <span style="color: #cc66cc;">18</span>, <span style="color: #cc66cc;">18</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addComponent</span><span style="color: #009900;">(</span>btnRefresh<span style="color: #009900;">)</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addComponent</span><span style="color: #009900;">(</span>txtUserName<span style="color: #009900;">)</span>
.<span style="color: #006633;">addComponent</span><span style="color: #009900;">(</span>txtPassword<span style="color: #009900;">)</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addContainerGap</span><span style="color: #009900;">(</span><span style="color: #cc66cc;">118</span>, <span style="color: #003399; font-weight: bold;">Short</span>.<span style="color: #006633;">MAX_VALUE</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span>
<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
layout.<span style="color: #006633;">setVerticalGroup</span><span style="color: #009900;">(</span>
layout.<span style="color: #006633;">createParallelGroup</span><span style="color: #009900;">(</span>javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">Alignment</span>.<span style="color: #006633;">LEADING</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addGroup</span><span style="color: #009900;">(</span>layout.<span style="color: #006633;">createSequentialGroup</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addGap</span><span style="color: #009900;">(</span><span style="color: #cc66cc;">34</span>, <span style="color: #cc66cc;">34</span>, <span style="color: #cc66cc;">34</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addGroup</span><span style="color: #009900;">(</span>layout.<span style="color: #006633;">createParallelGroup</span><span style="color: #009900;">(</span>javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">Alignment</span>.<span style="color: #006633;">BASELINE</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addComponent</span><span style="color: #009900;">(</span>txtUserName, javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">PREFERRED_SIZE</span>, javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">DEFAULT_SIZE</span>, javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">PREFERRED_SIZE</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addComponent</span><span style="color: #009900;">(</span>jLabel1<span style="color: #009900;">)</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addGap</span><span style="color: #009900;">(</span><span style="color: #cc66cc;">18</span>, <span style="color: #cc66cc;">18</span>, <span style="color: #cc66cc;">18</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addGroup</span><span style="color: #009900;">(</span>layout.<span style="color: #006633;">createParallelGroup</span><span style="color: #009900;">(</span>javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">Alignment</span>.<span style="color: #006633;">BASELINE</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addComponent</span><span style="color: #009900;">(</span>jLabel2<span style="color: #009900;">)</span>
.<span style="color: #006633;">addComponent</span><span style="color: #009900;">(</span>txtPassword, javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">PREFERRED_SIZE</span>, javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">DEFAULT_SIZE</span>, javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">PREFERRED_SIZE</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addGap</span><span style="color: #009900;">(</span><span style="color: #cc66cc;">50</span>, <span style="color: #cc66cc;">50</span>, <span style="color: #cc66cc;">50</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addGroup</span><span style="color: #009900;">(</span>layout.<span style="color: #006633;">createParallelGroup</span><span style="color: #009900;">(</span>javax.<span style="color: #006633;">swing</span>.<span style="color: #006633;">GroupLayout</span>.<span style="color: #006633;">Alignment</span>.<span style="color: #006633;">BASELINE</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addComponent</span><span style="color: #009900;">(</span>btnOK<span style="color: #009900;">)</span>
.<span style="color: #006633;">addComponent</span><span style="color: #009900;">(</span>btnRefresh<span style="color: #009900;">)</span><span style="color: #009900;">)</span>
.<span style="color: #006633;">addContainerGap</span><span style="color: #009900;">(</span><span style="color: #cc66cc;">48</span>, <span style="color: #003399; font-weight: bold;">Short</span>.<span style="color: #006633;">MAX_VALUE</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span>
<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
&nbsp;
pack<span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span><span style="color: #666666; font-style: italic;">// &lt;/editor-fold&gt; </span>
&nbsp;
<span style="color: #000000; font-weight: bold;">private</span> <span style="color: #006600; font-weight: bold;">void</span> btnRefreshActionPerformed<span style="color: #009900;">(</span>java.<span style="color: #006633;">awt</span>.<span style="color: #006633;">event</span>.<span style="color: #003399; font-weight: bold;">ActionEvent</span> evt<span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
txtUserName.<span style="color: #006633;">setText</span><span style="color: #009900;">(</span><span style="color: #0000ff;">&quot;&quot;</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
txtPassword.<span style="color: #006633;">setText</span><span style="color: #009900;">(</span><span style="color: #0000ff;">&quot;&quot;</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span>
&nbsp;
<span style="color: #000000; font-weight: bold;">private</span> <span style="color: #006600; font-weight: bold;">void</span> txtPasswordKeyPressed<span style="color: #009900;">(</span>java.<span style="color: #006633;">awt</span>.<span style="color: #006633;">event</span>.<span style="color: #003399; font-weight: bold;">KeyEvent</span> evt<span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
<span style="color: #000000; font-weight: bold;">if</span><span style="color: #009900;">(</span>evt.<span style="color: #006633;">getKeyCode</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span>==<span style="color: #003399; font-weight: bold;">KeyEvent</span>.<span style="color: #006633;">VK_ENTER</span><span style="color: #009900;">)</span><span style="color: #009900;">{</span>
<span style="color: #000000; font-weight: bold;">try</span><span style="color: #009900;">{</span>
connect=<span style="color: #003399; font-weight: bold;">DriverManager</span>.<span style="color: #006633;">getConnection</span><span style="color: #009900;">(</span><span style="color: #0000ff;">&quot;jdbc:ucanaccess://C:<span style="color: #000099; font-weight: bold;">\\</span>java<span style="color: #000099; font-weight: bold;">\\</span>dbHelp.mdb&quot;</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #003399; font-weight: bold;">String</span> sql = <span style="color: #0000ff;">&quot;select * from tblUser where UserName=? and Password=?&quot;</span><span style="color: #339933;">;</span>
pstmt = connect.<span style="color: #006633;">prepareStatement</span><span style="color: #009900;">(</span>sql<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
pstmt.<span style="color: #006633;">setString</span><span style="color: #009900;">(</span><span style="color: #cc66cc;">1</span>,txtUserName.<span style="color: #006633;">getText</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
pstmt.<span style="color: #006633;">setString</span><span style="color: #009900;">(</span><span style="color: #cc66cc;">2</span>,txtPassword.<span style="color: #006633;">getText</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
rs = pstmt.<span style="color: #006633;">executeQuery</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">if</span><span style="color: #009900;">(</span>rs.<span style="color: #006633;">next</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span><span style="color: #009900;">{</span>
&nbsp;
FormAdd f1 = <span style="color: #000000; font-weight: bold;">new</span> FormAdd<span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
f1.<span style="color: #006633;">setVisible</span><span style="color: #009900;">(</span><span style="color: #006600; font-weight: bold;">true</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">this</span>.<span style="color: #006633;">setVisible</span><span style="color: #009900;">(</span><span style="color: #006600; font-weight: bold;">false</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
rs.<span style="color: #006633;">close</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
pstmt.<span style="color: #006633;">close</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span><span style="color: #000000; font-weight: bold;">else</span><span style="color: #009900;">{</span>
<span style="color: #003399; font-weight: bold;">JOptionPane</span>.<span style="color: #006633;">showMessageDialog</span><span style="color: #009900;">(</span><span style="color: #006600; font-weight: bold;">null</span>,<span style="color: #0000ff;">&quot;กรุณา Login &amp; Password อีกครั้ง&quot;</span>,<span style="color: #0000ff;">&quot;รายงานสถานะ&quot;</span>,<span style="color: #003399; font-weight: bold;">JOptionPane</span>.<span style="color: #006633;">PLAIN_MESSAGE</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span>
<span style="color: #009900;">}</span><span style="color: #000000; font-weight: bold;">catch</span><span style="color: #009900;">(</span><span style="color: #003399; font-weight: bold;">Exception</span> ex<span style="color: #009900;">)</span><span style="color: #009900;">{</span>
<span style="color: #003399; font-weight: bold;">JOptionPane</span>.<span style="color: #006633;">showMessageDialog</span><span style="color: #009900;">(</span><span style="color: #006600; font-weight: bold;">null</span>,<span style="color: #0000ff;">&quot;Login Failed!<span style="color: #000099; font-weight: bold;">\n</span>&quot;</span>+ex.<span style="color: #006633;">getMessage</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span>
&nbsp;
<span style="color: #009900;">}</span>
<span style="color: #009900;">}</span>
&nbsp;
<span style="color: #000000; font-weight: bold;">private</span> <span style="color: #006600; font-weight: bold;">void</span> btnOKActionPerformed<span style="color: #009900;">(</span>java.<span style="color: #006633;">awt</span>.<span style="color: #006633;">event</span>.<span style="color: #003399; font-weight: bold;">ActionEvent</span> evt<span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
<span style="color: #000000; font-weight: bold;">try</span><span style="color: #009900;">{</span>
connect=<span style="color: #003399; font-weight: bold;">DriverManager</span>.<span style="color: #006633;">getConnection</span><span style="color: #009900;">(</span><span style="color: #0000ff;">&quot;jdbc:ucanaccess://C:<span style="color: #000099; font-weight: bold;">\\</span>java<span style="color: #000099; font-weight: bold;">\\</span>dbHelp.mdb&quot;</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #003399; font-weight: bold;">String</span> sql = <span style="color: #0000ff;">&quot;select * from tblUser where UserName=? and Password=?&quot;</span><span style="color: #339933;">;</span>
pstmt = connect.<span style="color: #006633;">prepareStatement</span><span style="color: #009900;">(</span>sql<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
pstmt.<span style="color: #006633;">setString</span><span style="color: #009900;">(</span><span style="color: #cc66cc;">1</span>,txtUserName.<span style="color: #006633;">getText</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
pstmt.<span style="color: #006633;">setString</span><span style="color: #009900;">(</span><span style="color: #cc66cc;">2</span>,txtPassword.<span style="color: #006633;">getText</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
rs = pstmt.<span style="color: #006633;">executeQuery</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">if</span><span style="color: #009900;">(</span>rs.<span style="color: #006633;">next</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span><span style="color: #009900;">{</span>
&nbsp;
FormAdd f1 = <span style="color: #000000; font-weight: bold;">new</span> FormAdd<span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
f1.<span style="color: #006633;">setVisible</span><span style="color: #009900;">(</span><span style="color: #006600; font-weight: bold;">true</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">this</span>.<span style="color: #006633;">setVisible</span><span style="color: #009900;">(</span><span style="color: #006600; font-weight: bold;">false</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
rs.<span style="color: #006633;">close</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
pstmt.<span style="color: #006633;">close</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span><span style="color: #000000; font-weight: bold;">else</span><span style="color: #009900;">{</span>
<span style="color: #003399; font-weight: bold;">JOptionPane</span>.<span style="color: #006633;">showMessageDialog</span><span style="color: #009900;">(</span><span style="color: #006600; font-weight: bold;">null</span>,<span style="color: #0000ff;">&quot;กรุณา Login &amp; Password อีกครั้ง&quot;</span>,<span style="color: #0000ff;">&quot;รายงานสถานะ&quot;</span>,<span style="color: #003399; font-weight: bold;">JOptionPane</span>.<span style="color: #006633;">PLAIN_MESSAGE</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span>
<span style="color: #009900;">}</span><span style="color: #000000; font-weight: bold;">catch</span><span style="color: #009900;">(</span><span style="color: #003399; font-weight: bold;">Exception</span> ex<span style="color: #009900;">)</span><span style="color: #009900;">{</span>
<span style="color: #003399; font-weight: bold;">JOptionPane</span>.<span style="color: #006633;">showMessageDialog</span><span style="color: #009900;">(</span><span style="color: #006600; font-weight: bold;">null</span>,<span style="color: #0000ff;">&quot;Login Failed!<span style="color: #000099; font-weight: bold;">\n</span>&quot;</span>+ex.<span style="color: #006633;">getMessage</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span>
<span style="color: #009900;">}</span>
&nbsp;
<span style="color: #008000; font-style: italic; font-weight: bold;">/**
* @param args the command line arguments
*/</span>
<span style="color: #000000; font-weight: bold;">public</span> <span style="color: #000000; font-weight: bold;">static</span> <span style="color: #006600; font-weight: bold;">void</span> main<span style="color: #009900;">(</span><span style="color: #003399; font-weight: bold;">String</span> args<span style="color: #009900;">[</span><span style="color: #009900;">]</span><span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
<span style="color: #666666; font-style: italic;">/* Set the Nimbus look and feel */</span>
<span style="color: #666666; font-style: italic;">//&lt;editor-fold defaultstate=&quot;collapsed&quot; desc=&quot; Look and feel setting code (optional) &quot;&gt;</span>
<span style="color: #666666; font-style: italic;">/* 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
*/</span>
<span style="color: #000000; font-weight: bold;">try</span> <span style="color: #009900;">{</span>
<span style="color: #000000; font-weight: bold;">for</span> <span style="color: #009900;">(</span>javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">UIManager.<span style="color: #006633;">LookAndFeelInfo</span></span> info : javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">UIManager</span>.<span style="color: #006633;">getInstalledLookAndFeels</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
<span style="color: #000000; font-weight: bold;">if</span> <span style="color: #009900;">(</span><span style="color: #0000ff;">&quot;Nimbus&quot;</span>.<span style="color: #006633;">equals</span><span style="color: #009900;">(</span>info.<span style="color: #006633;">getName</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">UIManager</span>.<span style="color: #006633;">setLookAndFeel</span><span style="color: #009900;">(</span>info.<span style="color: #006633;">getClassName</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">break</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span>
<span style="color: #009900;">}</span>
<span style="color: #009900;">}</span> <span style="color: #000000; font-weight: bold;">catch</span> <span style="color: #009900;">(</span><span style="color: #003399; font-weight: bold;">ClassNotFoundException</span> ex<span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
java.<span style="color: #006633;">util</span>.<span style="color: #006633;">logging</span>.<span style="color: #003399; font-weight: bold;">Logger</span>.<span style="color: #006633;">getLogger</span><span style="color: #009900;">(</span>FormLogin.<span style="color: #000000; font-weight: bold;">class</span>.<span style="color: #006633;">getName</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span>.<span style="color: #006633;">log</span><span style="color: #009900;">(</span>java.<span style="color: #006633;">util</span>.<span style="color: #006633;">logging</span>.<span style="color: #003399; font-weight: bold;">Level</span>.<span style="color: #006633;">SEVERE</span>, <span style="color: #006600; font-weight: bold;">null</span>, ex<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span> <span style="color: #000000; font-weight: bold;">catch</span> <span style="color: #009900;">(</span><span style="color: #003399; font-weight: bold;">InstantiationException</span> ex<span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
java.<span style="color: #006633;">util</span>.<span style="color: #006633;">logging</span>.<span style="color: #003399; font-weight: bold;">Logger</span>.<span style="color: #006633;">getLogger</span><span style="color: #009900;">(</span>FormLogin.<span style="color: #000000; font-weight: bold;">class</span>.<span style="color: #006633;">getName</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span>.<span style="color: #006633;">log</span><span style="color: #009900;">(</span>java.<span style="color: #006633;">util</span>.<span style="color: #006633;">logging</span>.<span style="color: #003399; font-weight: bold;">Level</span>.<span style="color: #006633;">SEVERE</span>, <span style="color: #006600; font-weight: bold;">null</span>, ex<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span> <span style="color: #000000; font-weight: bold;">catch</span> <span style="color: #009900;">(</span><span style="color: #003399; font-weight: bold;">IllegalAccessException</span> ex<span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
java.<span style="color: #006633;">util</span>.<span style="color: #006633;">logging</span>.<span style="color: #003399; font-weight: bold;">Logger</span>.<span style="color: #006633;">getLogger</span><span style="color: #009900;">(</span>FormLogin.<span style="color: #000000; font-weight: bold;">class</span>.<span style="color: #006633;">getName</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span>.<span style="color: #006633;">log</span><span style="color: #009900;">(</span>java.<span style="color: #006633;">util</span>.<span style="color: #006633;">logging</span>.<span style="color: #003399; font-weight: bold;">Level</span>.<span style="color: #006633;">SEVERE</span>, <span style="color: #006600; font-weight: bold;">null</span>, ex<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span> <span style="color: #000000; font-weight: bold;">catch</span> <span style="color: #009900;">(</span>javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">UnsupportedLookAndFeelException</span> ex<span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
java.<span style="color: #006633;">util</span>.<span style="color: #006633;">logging</span>.<span style="color: #003399; font-weight: bold;">Logger</span>.<span style="color: #006633;">getLogger</span><span style="color: #009900;">(</span>FormLogin.<span style="color: #000000; font-weight: bold;">class</span>.<span style="color: #006633;">getName</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span>.<span style="color: #006633;">log</span><span style="color: #009900;">(</span>java.<span style="color: #006633;">util</span>.<span style="color: #006633;">logging</span>.<span style="color: #003399; font-weight: bold;">Level</span>.<span style="color: #006633;">SEVERE</span>, <span style="color: #006600; font-weight: bold;">null</span>, ex<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span>
<span style="color: #666666; font-style: italic;">//&lt;/editor-fold&gt;</span>
&nbsp;
<span style="color: #666666; font-style: italic;">/* Create and display the form */</span>
java.<span style="color: #006633;">awt</span>.<span style="color: #003399; font-weight: bold;">EventQueue</span>.<span style="color: #006633;">invokeLater</span><span style="color: #009900;">(</span><span style="color: #000000; font-weight: bold;">new</span> <span style="color: #003399; font-weight: bold;">Runnable</span><span style="color: #009900;">(</span><span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
<span style="color: #000000; font-weight: bold;">public</span> <span style="color: #006600; font-weight: bold;">void</span> run<span style="color: #009900;">(</span><span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
<span style="color: #000000; font-weight: bold;">new</span> FormLogin<span style="color: #009900;">(</span><span style="color: #009900;">)</span>.<span style="color: #006633;">setVisible</span><span style="color: #009900;">(</span><span style="color: #006600; font-weight: bold;">true</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span>
<span style="color: #009900;">}</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
<span style="color: #009900;">}</span>
&nbsp;
<span style="color: #666666; font-style: italic;">// Variables declaration - do not modify </span>
<span style="color: #000000; font-weight: bold;">private</span> javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">JButton</span> btnOK<span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">private</span> javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">JButton</span> btnRefresh<span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">private</span> javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">JLabel</span> jLabel1<span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">private</span> javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">JLabel</span> jLabel2<span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">private</span> javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">JPasswordField</span> txtPassword<span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">private</span> javax.<span style="color: #006633;">swing</span>.<span style="color: #003399; font-weight: bold;">JTextField</span> txtUserName<span style="color: #339933;">;</span>
<span style="color: #666666; font-style: italic;">// End of variables declaration </span>
<span style="color: #009900;">}</span></pre>

 

ดูแบบนี้ดูยาก
====================
แยกส่วนหัว import
====================
import java.awt.event.KeyEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import javax.swing.JOptionPane;
import java.sql.Statement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

 

กำหนดตัวแปร

 

ฟอร์มใช้สำหรับโหลดครั้งแรกของ Java

 

ปุ่ม Refresh
===================

 

ปุ่ม OK
========================

 

หากกด Enter ในกรอบแดง
=======================
if(evt.getKeyCode()==KeyEvent.VK_ENTER){
try{
connect=DriverManager.getConnection("jdbc:ucanaccess://C:\\java\\dbHelp.mdb");
String sql = "select * from tblUser where UserName=? and Password=?";
pstmt = connect.prepareStatement(sql);
pstmt.setString(1,txtUserName.getText());
pstmt.setString(2,txtPassword.getText());
rs = pstmt.executeQuery();
if(rs.next()){

FormAdd f1 = new FormAdd();
f1.setVisible(true);
this.setVisible(false);
rs.close();
pstmt.close();
}else{
JOptionPane.showMessageDialog(null,"กรุณา Login & Password อีกครั้ง","รายงานสถานะ",JOptionPane.PLAIN_MESSAGE);
}
}catch(Exception ex){
JOptionPane.showMessageDialog(null,"Login Failed!\n"+ex.getMessage());
}

 

พอใส่ user name,password ถูกต้องแล้วกด Enter แล้วเข้าสู่ FormAdd
==================