Java 操作MySQL数据库
用来存储数据的类
/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package demo; /** * * @author Zhang Tingkuo */ public class Country { private String code; private String name; private String continent; private int population; public Country() { } public Country(String code, String name, String continent, int population) { this.code = code; this.name = name; this.continent = continent; this.population = population; } public String getCode() { return code; } public void setCode(String code) { this.code = code; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getContinent() { return continent; } public void setContinent(String continent) { this.continent = continent; } public int getPopulation() { return population; } public void setPopulation(int population) { this.population = population; } }
用来操作数据库的类
/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package demo; import java.io.BufferedWriter; import java.io.FileWriter; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.util.ArrayList; import java.util.Date; /** * * @author Zhang Tingkuo */ public class Manager { private String code; private String name; private String continent; private String population; private String node; private ArrayList<Country> countryList = new ArrayList<Country>(); public Manager(String code, String name, String continent, String population, String node) { this.code = code; this.name = name; this.continent = continent; this.population = population; this.node = node; } public void Insert(String code, String name, String continent, String population) throws Exception { //0.SQL String sql = "Insert into Country(Code,Name,Continent,Population) values(?,?,?,?)"; System.out.println("sql successfully."); logFile("sql successfully."); //1.Driver Class.forName("com.mysql.jdbc.Driver"); System.out.println("driver successfully."); logFile("driver successfully."); //2.Connection Connection connection = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/world", "admin", "admin"); System.out.println("connecte successfully."); logFile("connecte successfully."); //3.Statement PreparedStatement statement = connection.prepareStatement(sql); System.out.println("statement successfully."); logFile("statement successfully."); //4.Result statement.setString(1, code); statement.setString(2, name); statement.setString(3, continent); statement.setString(4, population); System.out.println(statement); logFile("" + statement); //5 statement.executeUpdate(); System.out.println("insert successfully."); logFile("insert successfully."); //6.Close statement.close(); connection.close(); System.out.println("close successfully."); logFile("close successfully."); } public void Delete(String code, String name, String continent, String population) throws Exception { //0.SQL String sql = "delete from Country where Code = ?"; System.out.println("sql successfully."); logFile("sql successfully."); //1.Driver Class.forName("com.mysql.jdbc.Driver"); System.out.println("driver successfully."); logFile("driver successfully."); //2.Connection Connection connection = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/world", "admin", "admin"); System.out.println("connecte successfully."); logFile("connecte successfully."); //3.Statement PreparedStatement statement = connection.prepareStatement(sql); System.out.println("statement successfully."); logFile("statement successfully."); //4.Result statement.setString(1, code); System.out.println(statement); logFile("" + statement); //5 statement.executeUpdate(); System.out.println("delete successfully."); logFile("delete successfully."); //6.Close statement.close(); connection.close(); System.out.println("close successfully."); logFile("close successfully."); } public void Update(String code, String name, String continent, String population) throws Exception { //0.SQL String sql = "Update Country set Code = ?, Name = ?, Continent = ?, Population = ? where Code = ?"; System.out.println("sql successfully."); logFile("sql successfully."); //1.Driver Class.forName("com.mysql.jdbc.Driver"); System.out.println("driver successfully."); logFile("driver successfully."); //2.Connection Connection connection = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/world", "admin", "admin"); System.out.println("connecte successfully."); logFile("connecte successfully."); //3.Statement PreparedStatement statement = connection.prepareStatement(sql); System.out.println("statement successfully."); logFile("statement successfully."); //4.Result statement.setString(1, code); statement.setString(2, name); statement.setString(3, continent); statement.setString(4, population); statement.setString(5, code); System.out.println(statement); logFile("" + statement); //5 statement.executeUpdate(); System.out.println("update successfully."); logFile("update successfully."); //6.Close statement.close(); connection.close(); System.out.println("close successfully."); logFile("close successfully."); } public void Seach(String code, String name, String continent, String population, String node) throws Exception { //0.SQL String sql = "Select Code,Name,Continent,Population From Country where " + node + " like ? order by Name"; System.out.println("sql successfully."); logFile("sql successfully."); //1.Driver Class.forName("com.mysql.jdbc.Driver"); System.out.println("driver successfully."); logFile("driver successfully."); //2.Connection Connection connection = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/world", "admin", "admin"); System.out.println("connecte successfully."); logFile("connecte successfully."); //3.Statement PreparedStatement statement = connection.prepareStatement(sql); System.out.println("statement successfully."); logFile("statement successfully."); // if (node.endsWith("Code")) { statement.setString(1, "%" + code + "%"); } else if (node.endsWith("Name")) { statement.setString(1, name + "%"); } else if (node.endsWith("Continent")) { statement.setString(1, "%" + continent + "%"); } else if (node.endsWith("Population")) { statement = connection.prepareStatement("Select Code,Name,Continent,Population From Country where Population " + population + " order by Name"); } System.out.println(statement); logFile("" + statement); //4.Result ResultSet result = statement.executeQuery(); System.out.println("search successfully."); logFile("search successfully."); //5.deal while (result.next()) { countryList.add(new Country( result.getString("Code"), result.getString("Name"), result.getString("Continent"), result.getInt("Population"))); } System.out.println("arraylist successfully."); logFile("arraylist successfully."); //6.Close result.close(); statement.close(); connection.close(); System.out.println("close successfully."); logFile("close successfully."); } public void logFile(String string) throws Exception { BufferedWriter outputFile = new BufferedWriter(new FileWriter("log.txt", true)); outputFile.write(new Date() + ":" + string + "\r\n"); outputFile.close(); } public String getCode() { return code; } public void setCode(String code) { this.code = code; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getContinent() { return continent; } public void setContinent(String continent) { this.continent = continent; } public String getPopulation() { return population; } public void setPopulation(String population) { this.population = population; } public ArrayList<Country> getCountryList() { return countryList; } public void setCountryList(ArrayList<Country> countryList) { this.countryList = countryList; } }
主界面的类
1 /* 2 * To change this template, choose Tools | Templates 3 * and open the template in the editor. 4 */ 5 package demo; 6 7 import javax.swing.JOptionPane; 8 import javax.swing.table.DefaultTableModel; 9 10 /** 11 * 12 * @author Zhang Tingkuo 13 */ 14 public class WorldManager extends javax.swing.JFrame { 15 16 private String code; 17 private String name; 18 private String continent; 19 private String population; 20 private String node; 21 private int index; 22 23 /** 24 * Creates new form WorldManager 25 */ 26 public WorldManager() { 27 initComponents(); 28 this.setLocationRelativeTo(null); 29 this.setResizable(false); 30 } 31 32 /** 33 * This method is called from within the constructor to initialize the form. 34 * WARNING: Do NOT modify this code. The content of this method is always 35 * regenerated by the Form Editor. 36 */ 37 @SuppressWarnings("unchecked") 38 // <editor-fold defaultstate="collapsed" desc="Generated Code"> 39 private void initComponents() { 40 41 buttonGroup1 = new javax.swing.ButtonGroup(); 42 jPanel1 = new javax.swing.JPanel(); 43 jLabel1 = new javax.swing.JLabel(); 44 jLabel2 = new javax.swing.JLabel(); 45 jLabel3 = new javax.swing.JLabel(); 46 jLabel4 = new javax.swing.JLabel(); 47 txtCode = new javax.swing.JTextField(); 48 txtName = new javax.swing.JTextField(); 49 txtContinent = new javax.swing.JTextField(); 50 txtPopulation = new javax.swing.JTextField(); 51 btnSearch = new javax.swing.JButton(); 52 btnInsert = new javax.swing.JButton(); 53 btnUpdate = new javax.swing.JButton(); 54 btnDelete = new javax.swing.JButton(); 55 jScrollPane2 = new javax.swing.JScrollPane(); 56 tableDisplay = new javax.swing.JTable(); 57 jPanel2 = new javax.swing.JPanel(); 58 rbtInsert = new javax.swing.JRadioButton(); 59 rbtSearch = new javax.swing.JRadioButton(); 60 rbtDelete = new javax.swing.JRadioButton(); 61 rbtUpdate = new javax.swing.JRadioButton(); 62 cmbNode = new javax.swing.JComboBox(); 63 64 setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 65 setTitle("Countyr Manager"); 66 67 jPanel1.setBorder(javax.swing.BorderFactory.createEtchedBorder()); 68 69 jLabel1.setText("Code :"); 70 71 jLabel2.setText("Name :"); 72 73 jLabel3.setText("Continent :"); 74 75 jLabel4.setText("Population :"); 76 77 txtCode.setText("CHN"); 78 79 txtName.setText("China"); 80 81 txtContinent.setText("Asia"); 82 83 txtPopulation.setText("> 10000"); 84 85 btnSearch.setText("Search"); 86 btnSearch.setEnabled(false); 87 btnSearch.addActionListener(new java.awt.event.ActionListener() { 88 public void actionPerformed(java.awt.event.ActionEvent evt) { 89 btnSearchActionPerformed(evt); 90 } 91 }); 92 93 btnInsert.setText("Insert"); 94 btnInsert.setEnabled(false); 95 btnInsert.addActionListener(new java.awt.event.ActionListener() { 96 public void actionPerformed(java.awt.event.ActionEvent evt) { 97 btnInsertActionPerformed(evt); 98 } 99 }); 100 101 btnUpdate.setText("Update"); 102 btnUpdate.setEnabled(false); 103 btnUpdate.addActionListener(new java.awt.event.ActionListener() { 104 public void actionPerformed(java.awt.event.ActionEvent evt) { 105 btnUpdateActionPerformed(evt); 106 } 107 }); 108 109 btnDelete.setText("Delete"); 110 btnDelete.setEnabled(false); 111 btnDelete.addActionListener(new java.awt.event.ActionListener() { 112 public void actionPerformed(java.awt.event.ActionEvent evt) { 113 btnDeleteActionPerformed(evt); 114 } 115 }); 116 117 javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); 118 jPanel1.setLayout(jPanel1Layout); 119 jPanel1Layout.setHorizontalGroup( 120 jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 121 .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup() 122 .addContainerGap() 123 .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) 124 .addComponent(btnSearch, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 125 .addComponent(btnInsert, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 126 .addGroup(javax.swing.GroupLayout.Alignment.LEADING, jPanel1Layout.createSequentialGroup() 127 .addComponent(jLabel4) 128 .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 129 .addComponent(txtPopulation, javax.swing.GroupLayout.DEFAULT_SIZE, 138, Short.MAX_VALUE)) 130 .addGroup(javax.swing.GroupLayout.Alignment.LEADING, jPanel1Layout.createSequentialGroup() 131 .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 132 .addComponent(jLabel3) 133 .addComponent(jLabel2) 134 .addComponent(jLabel1)) 135 .addGap(18, 18, 18) 136 .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 137 .addComponent(txtCode) 138 .addComponent(txtName) 139 .addComponent(txtContinent))) 140 .addComponent(btnDelete, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 141 .addComponent(btnUpdate, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 142 .addContainerGap()) 143 ); 144 jPanel1Layout.setVerticalGroup( 145 jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 146 .addGroup(jPanel1Layout.createSequentialGroup() 147 .addContainerGap() 148 .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 149 .addComponent(jLabel1) 150 .addComponent(txtCode, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 151 .addGap(18, 18, 18) 152 .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 153 .addComponent(jLabel2) 154 .addComponent(txtName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 155 .addGap(18, 18, 18) 156 .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 157 .addComponent(jLabel3) 158 .addComponent(txtContinent, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 159 .addGap(18, 18, 18) 160 .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 161 .addComponent(jLabel4) 162 .addComponent(txtPopulation, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 163 .addGap(18, 18, 18) 164 .addComponent(btnInsert) 165 .addGap(18, 18, 18) 166 .addComponent(btnDelete) 167 .addGap(18, 18, 18) 168 .addComponent(btnUpdate) 169 .addGap(18, 18, 18) 170 .addComponent(btnSearch) 171 .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 172 ); 173 174 tableDisplay.setModel(new javax.swing.table.DefaultTableModel( 175 new Object [][] { 176 177 }, 178 new String [] { 179 "Code", "Name", "Continent", "Population" 180 } 181 )); 182 tableDisplay.setGridColor(new java.awt.Color(0, 0, 204)); 183 tableDisplay.setSelectionBackground(new java.awt.Color(51, 255, 204)); 184 tableDisplay.setSelectionForeground(new java.awt.Color(255, 0, 0)); 185 tableDisplay.addMouseListener(new java.awt.event.MouseAdapter() { 186 public void mouseClicked(java.awt.event.MouseEvent evt) { 187 tableDisplayMouseClicked(evt); 188 } 189 }); 190 jScrollPane2.setViewportView(tableDisplay); 191 192 jPanel2.setBorder(javax.swing.BorderFactory.createEtchedBorder()); 193 194 buttonGroup1.add(rbtInsert); 195 rbtInsert.setText("Insert"); 196 rbtInsert.addActionListener(new java.awt.event.ActionListener() { 197 public void actionPerformed(java.awt.event.ActionEvent evt) { 198 rbtInsertActionPerformed(evt); 199 } 200 }); 201 202 buttonGroup1.add(rbtSearch); 203 rbtSearch.setText("Search"); 204 rbtSearch.addActionListener(new java.awt.event.ActionListener() { 205 public void actionPerformed(java.awt.event.ActionEvent evt) { 206 rbtSearchActionPerformed(evt); 207 } 208 }); 209 210 buttonGroup1.add(rbtDelete); 211 rbtDelete.setText("Delete"); 212 rbtDelete.addActionListener(new java.awt.event.ActionListener() { 213 public void actionPerformed(java.awt.event.ActionEvent evt) { 214 rbtDeleteActionPerformed(evt); 215 } 216 }); 217 218 buttonGroup1.add(rbtUpdate); 219 rbtUpdate.setText("Update"); 220 rbtUpdate.addActionListener(new java.awt.event.ActionListener() { 221 public void actionPerformed(java.awt.event.ActionEvent evt) { 222 rbtUpdateActionPerformed(evt); 223 } 224 }); 225 226 cmbNode.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Code", "Name", "Continent", "Population" })); 227 228 javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2); 229 jPanel2.setLayout(jPanel2Layout); 230 jPanel2Layout.setHorizontalGroup( 231 jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 232 .addGroup(jPanel2Layout.createSequentialGroup() 233 .addContainerGap() 234 .addComponent(rbtInsert) 235 .addGap(18, 18, 18) 236 .addComponent(rbtDelete) 237 .addGap(18, 18, 18) 238 .addComponent(rbtUpdate) 239 .addGap(18, 18, 18) 240 .addComponent(rbtSearch) 241 .addGap(18, 18, 18) 242 .addComponent(cmbNode, 0, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 243 .addContainerGap()) 244 ); 245 jPanel2Layout.setVerticalGroup( 246 jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 247 .addGroup(jPanel2Layout.createSequentialGroup() 248 .addContainerGap(10, Short.MAX_VALUE) 249 .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 250 .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 251 .addComponent(rbtInsert) 252 .addComponent(rbtDelete) 253 .addComponent(rbtUpdate) 254 .addComponent(rbtSearch)) 255 .addComponent(cmbNode, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 256 .addContainerGap()) 257 ); 258 259 javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); 260 getContentPane().setLayout(layout); 261 layout.setHorizontalGroup( 262 layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 263 .addGroup(layout.createSequentialGroup() 264 .addContainerGap() 265 .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) 266 .addComponent(jScrollPane2) 267 .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 268 .addGap(18, 18, 18) 269 .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 270 .addContainerGap()) 271 ); 272 layout.setVerticalGroup( 273 layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 274 .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() 275 .addContainerGap() 276 .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 277 .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 278 .addGroup(layout.createSequentialGroup() 279 .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE) 280 .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 281 .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))) 282 .addContainerGap()) 283 ); 284 285 pack(); 286 }// </editor-fold> 287 288 private void btnSearchActionPerformed(java.awt.event.ActionEvent evt) { 289 // Search 290 DefaultTableModel tableModel = (DefaultTableModel) tableDisplay.getModel(); 291 code = txtCode.getText(); 292 name = txtName.getText(); 293 continent = txtContinent.getText(); 294 population = txtPopulation.getText(); 295 node = cmbNode.getSelectedItem().toString(); 296 297 //ClearTable 298 if (tableDisplay.getRowCount() != 0) { 299 ((DefaultTableModel) tableDisplay.getModel()).getDataVector().removeAllElements(); 300 } 301 302 try { 303 Manager manager = new Manager(code, name, continent, population, node); 304 manager.Seach(code, name, continent, population, node); 305 for (int i = 0; i < manager.getCountryList().size(); i++) { 306 tableModel.addRow(new Object[]{ 307 manager.getCountryList().get(i).getCode(), 308 manager.getCountryList().get(i).getName(), 309 manager.getCountryList().get(i).getContinent(), 310 manager.getCountryList().get(i).getPopulation()}); 311 } 312 } catch (Exception e) { 313 JOptionPane.showMessageDialog(this, e, "Error", JOptionPane.ERROR_MESSAGE); 314 } 315 } 316 317 private void btnInsertActionPerformed(java.awt.event.ActionEvent evt) { 318 // TODO add your handling code here: 319 code = txtCode.getText(); 320 name = txtName.getText(); 321 continent = txtContinent.getText(); 322 population = txtPopulation.getText(); 323 324 try { 325 Manager manager = new Manager(code, name, continent, population, node); 326 manager.Insert(code, name, continent, population); 327 } catch (Exception e) { 328 JOptionPane.showMessageDialog(this, e, "Error", JOptionPane.ERROR_MESSAGE); 329 } 330 } 331 332 private void btnUpdateActionPerformed(java.awt.event.ActionEvent evt) { 333 // Update data 334 code = txtCode.getText(); 335 name = txtName.getText(); 336 continent = txtContinent.getText(); 337 population = txtPopulation.getText(); 338 try { 339 Manager manager = new Manager(code, name, continent, population, node); 340 manager.Update(code, name, continent, population); 341 } catch (Exception e) { 342 JOptionPane.showMessageDialog(this, e, "Error", JOptionPane.ERROR_MESSAGE); 343 } 344 } 345 346 private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) { 347 // Delete Data 348 code = txtCode.getText(); 349 name = txtName.getText(); 350 continent = txtContinent.getText(); 351 population = txtPopulation.getText(); 352 try { 353 Manager manager = new Manager(code, name, continent, population, node); 354 manager.Delete(code, name, continent, population); 355 } catch (Exception e) { 356 JOptionPane.showMessageDialog(this, e, "Error", JOptionPane.ERROR_MESSAGE); 357 } 358 } 359 360 private void rbtInsertActionPerformed(java.awt.event.ActionEvent evt) { 361 // TODO add your handling code here: 362 txtPopulation.setText("000"); 363 btnInsert.setEnabled(true); 364 btnDelete.setEnabled(false); 365 btnUpdate.setEnabled(false); 366 btnSearch.setEnabled(false); 367 } 368 369 private void rbtDeleteActionPerformed(java.awt.event.ActionEvent evt) { 370 // TODO add your handling code here: 371 btnInsert.setEnabled(false); 372 btnDelete.setEnabled(true); 373 btnUpdate.setEnabled(false); 374 btnSearch.setEnabled(false); 375 } 376 377 private void rbtUpdateActionPerformed(java.awt.event.ActionEvent evt) { 378 // TODO add your handling code here: 379 btnInsert.setEnabled(false); 380 btnDelete.setEnabled(false); 381 btnUpdate.setEnabled(true); 382 btnSearch.setEnabled(false); 383 } 384 385 private void rbtSearchActionPerformed(java.awt.event.ActionEvent evt) { 386 // TODO add your handling code here: 387 btnInsert.setEnabled(false); 388 btnDelete.setEnabled(false); 389 btnUpdate.setEnabled(false); 390 btnSearch.setEnabled(true); 391 } 392 393 private void tableDisplayMouseClicked(java.awt.event.MouseEvent evt) { 394 // TODO add your handling code here: 395 index = tableDisplay.getSelectedRow(); 396 397 txtCode.setText(tableDisplay.getValueAt(index, 0).toString()); 398 txtName.setText(tableDisplay.getValueAt(index, 1).toString()); 399 txtContinent.setText(tableDisplay.getValueAt(index, 2).toString()); 400 txtPopulation.setText(tableDisplay.getValueAt(index, 3).toString()); 401 } 402 403 /** 404 * @param args the command line arguments 405 */ 406 public static void main(String args[]) { 407 /* Set the Nimbus look and feel */ 408 //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "> 409 /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. 410 * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 411 */ 412 try { 413 for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { 414 if ("Nimbus".equals(info.getName())) { 415 javax.swing.UIManager.setLookAndFeel(info.getClassName()); 416 break; 417 } 418 } 419 } catch (ClassNotFoundException ex) { 420 java.util.logging.Logger.getLogger(WorldManager.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 421 } catch (InstantiationException ex) { 422 java.util.logging.Logger.getLogger(WorldManager.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 423 } catch (IllegalAccessException ex) { 424 java.util.logging.Logger.getLogger(WorldManager.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 425 } catch (javax.swing.UnsupportedLookAndFeelException ex) { 426 java.util.logging.Logger.getLogger(WorldManager.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 427 } 428 //</editor-fold> 429 430 /* Create and display the form */ 431 java.awt.EventQueue.invokeLater(new Runnable() { 432 @Override 433 public void run() { 434 new WorldManager().setVisible(true); 435 } 436 }); 437 } 438 // Variables declaration - do not modify 439 private javax.swing.JButton btnDelete; 440 private javax.swing.JButton btnInsert; 441 private javax.swing.JButton btnSearch; 442 private javax.swing.JButton btnUpdate; 443 private javax.swing.ButtonGroup buttonGroup1; 444 private javax.swing.JComboBox cmbNode; 445 private javax.swing.JLabel jLabel1; 446 private javax.swing.JLabel jLabel2; 447 private javax.swing.JLabel jLabel3; 448 private javax.swing.JLabel jLabel4; 449 private javax.swing.JPanel jPanel1; 450 private javax.swing.JPanel jPanel2; 451 private javax.swing.JScrollPane jScrollPane2; 452 private javax.swing.JRadioButton rbtDelete; 453 private javax.swing.JRadioButton rbtInsert; 454 private javax.swing.JRadioButton rbtSearch; 455 private javax.swing.JRadioButton rbtUpdate; 456 private javax.swing.JTable tableDisplay; 457 private javax.swing.JTextField txtCode; 458 private javax.swing.JTextField txtContinent; 459 private javax.swing.JTextField txtName; 460 private javax.swing.JTextField txtPopulation; 461 // End of variables declaration 462 }