bonjour ,
j'ai implémenté ce code :
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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import java.sql.*;
import java.io.*;
import java.util.*;
import javax.swing.table.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
public class Connect extends javax.swing.JFrame {
Connection connection;
/** Creates new form Main */
public Connect() {
initComponents();
setSize(515,535);
this.setResizable(false);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
}
 
/** 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.
*/
private void initComponents() {//GEN-BEGIN:initComponents
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
jButton1 = new javax.swing.JButton();
jPasswordField1 = new javax.swing.JPasswordField();
jPanel2 = new javax.swing.JPanel();
jScrollPane2 = new javax.swing.JScrollPane();
jTextPane2 = new javax.swing.JTextPane();
jPanel3 = new javax.swing.JPanel();
jScrollPane1 = new javax.swing.JScrollPane();
jTextPane1 = new javax.swing.JTextPane();
jButton2 = new javax.swing.JButton();
jPanel4 = new javax.swing.JPanel();
jScrollPane3 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable();
jButton4 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
jButton5 = new javax.swing.JButton();
jButton6 = new javax.swing.JButton();
jLabel3 = new javax.swing.JLabel();
 
getContentPane().setLayout(null);
 
setTitle("IDS v 1.0");
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent evt) {
exitForm(evt);
}
});
 
jPanel1.setLayout(null);
 
jLabel1.setText("user");
jPanel1.add(jLabel1);
jLabel1.setBounds(10, 10, 40, 20);
 
jLabel2.setText("password");
jPanel1.add(jLabel2);
jLabel2.setBounds(130, 10, 70, 24);
 
jTextField1.setName("user");
jTextField1.setPreferredSize(new java.awt.Dimension(50, 25));
jPanel1.add(jTextField1);
jTextField1.setBounds(50, 10, 70, 25);
 
jButton1.setText("connect");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
 
jPanel1.add(jButton1);
jButton1.setBounds(310, 10, 90, 30);
 
jPanel1.add(jPasswordField1);
jPasswordField1.setBounds(200, 10, 100, 28);
 
getContentPane().add(jPanel1);
jPanel1.setBounds(0, 0, 410, 40);
 
jPanel2.setLayout(new java.awt.BorderLayout());
 
jScrollPane2.setViewportView(jTextPane2);
 
jPanel2.add(jScrollPane2, java.awt.BorderLayout.CENTER);
 
getContentPane().add(jPanel2);
jPanel2.setBounds(10, 70, 490, 130);
 
jPanel3.setLayout(new java.awt.BorderLayout());
 
jScrollPane1.setHorizontalScrollBarPolicy(javax.swing.JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
jTextPane1.setText("To connect, enter your username and password");
jScrollPane1.setViewportView(jTextPane1);
 
jPanel3.add(jScrollPane1, java.awt.BorderLayout.CENTER);
 
getContentPane().add(jPanel3);
jPanel3.setBounds(10, 380, 690, 200);
 
jButton2.setText("execute SQL");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
 
getContentPane().add(jButton2);
jButton2.setBounds(290, 210, 110, 30);
 
jPanel4.setLayout(new java.awt.BorderLayout());
 
jScrollPane3.setBorder(new javax.swing.border.MatteBorder(null));
jTable1.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"
}
));
jScrollPane3.setViewportView(jTable1);
 
jPanel4.add(jScrollPane3, java.awt.BorderLayout.CENTER);
 
getContentPane().add(jPanel4);
jPanel4.setBounds(10, 250, 490, 120);
 
jButton4.setText("import SQL File");
jButton4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
OuvrirFichierActionPerformed(evt);
}
});
 
getContentPane().add(jButton4);
jButton4.setBounds(150, 210, 140, 30);
 
jButton3.setText("show databases");
jButton3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton3ActionPerformed(evt);
}
});
 
getContentPane().add(jButton3);
jButton3.setBounds(100, 250, 140, 30);
 
 
    jButton6.addActionListener(new java.awt.event.ActionListener() {
    public void actionPerformed(java.awt.event.ActionEvent evt) {
    jButton6ActionPerformed(evt);
    }
    });
 
    getContentPane().add(jButton3);
    jButton3.setBounds(10, 210, 140, 30);
 
jButton5.setText("quit");
jButton5.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
quitterActionPerformed(evt);
}
});
 
getContentPane().add(jButton5);
jButton5.setBounds(440, 480, 60, 30);
 
jLabel3.setText("Write your SQL code here or import a file :");
getContentPane().add(jLabel3);
jLabel3.setBounds(10, 50, 270, 24);
 
pack();
}//GEN-END:initComponents
 
private void quitterActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_quitterActionPerformed
// Add your handling code here:
System.exit(0);
}//GEN-LAST:event_quitterActionPerformed
 
private void OuvrirFichierActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_OuvrirFichierActionPerformed
// Add your handling code here:
String currentDir=".";
String destination;
File selected;
JFileChooser chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
File fdir = new File(currentDir);
chooser.setCurrentDirectory(fdir);
if(chooser.showDialog(this,"Choisir") == JFileChooser.APPROVE_OPTION) {
selected = chooser.getSelectedFile();
destination = new String(selected.getParent() + File.separatorChar + selected.getName());
currentDir = selected.getParent();
String s= lireFichier(destination);
jTextPane2.setText(s);
}
}//GEN-LAST:event_OuvrirFichierActionPerformed
 
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton3ActionPerformed
// Add your handling code here:
executerSQL("show Databases");
message m = new message();
    m.show();
}//GEN-LAST:event_jButton3ActionPerformed
 
 private void jButton6ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton3ActionPerformed
// Add your handling code here:
  executerSQL("show Databases");
  executerSQL("use snort");
  executerSQL("show Tables");
  }//GEN-LAST:event_jButton3ActionPerformed
 
 
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton2ActionPerformed
// Add your handling code here:
try{
String query=this.jTextPane2.getSelectedText().replace( '%', '`' );
if(connection==null) ecrireOut("you have to be identified to perform this operation");
else
{executerSQL(query);
if (query.startsWith("drop")||query.startsWith("create")) executerSQL("show tables");}
}
catch(NullPointerException excep){
ecrireOut("you have to select some code to execute");
}
}//GEN-LAST:event_jButton2ActionPerformed
 
void executerSQL(String query){
// executer le sql de la fenetre
if (connection==null) ecrireOut("you have to be identified to perform this operation");
try {
if ( connection == null ) {System.out.println("connection==null");return;}
Statement stm = connection.createStatement();
String catalog = connection.getCatalog();
 
 
 
String queryMaj = query.toUpperCase();
 
if ( ( queryMaj.trim().startsWith( "SELECT" ) )
|| ( queryMaj.trim().startsWith( "DESCRIBE" ) )
|| ( queryMaj.trim().startsWith( "SHOW" ) ) ) {
jTable1.removeAll();
ResultSet rs = stm.executeQuery( query );
ResultSetMetaData mdt = rs.getMetaData();
int num = mdt.getColumnCount();
DefaultTableModel df = new DefaultTableModel() {
public boolean isCellEditable( int row, int col )
{ if ( (row>>1)<<1 == row ) return true; return false; } };
for ( int i = 0; i < num; i++ ) { df.addColumn( mdt.getColumnName( i + 1 ) ); }
jTable1.setModel( df );
 
TableCellRenderer tbcH = createDemoHeaderRenderer();
for ( int i = 0; i < num; i++ ) {
TableColumn tc = jTable1.getTableHeader().getColumnModel().getColumn( i );
tc.setHeaderRenderer( tbcH );
tc.setCellRenderer( new DemoCellRenderer() );
}
int line = 0;
while ( rs.next() ) {
Vector v = new Vector( 10 );
for ( int col = 0; col < num; col++ )
v.addElement( rs.getString( col + 1 ) );
df.addRow( v );
line++;
}
jTextPane1.setText( line + " rows selected");
rs.close();
}
else {
ecrireOut( "SQL executer : " + query );
stm.executeUpdate( query );
}
stm.close();
}
catch ( Exception e ) {
jTextPane1.setText( "\nError execute sql : " + e );
jTextPane1.setText( "sql : " + query );
}
}
void ecrireOut(String chaine){
jTextPane1.setText(chaine);
}
 
class DemoCellRenderer extends JLabel
implements TableCellRenderer {
boolean isBordered = true;
Color selectedForeground = null;
Color selectedBackground = null;
Color unselectedForegroundAlt = null;
Color unselectedBackgroundAlt = new Color( 20, 200, 200 );
Color unselectedForeground = null;
Color unselectedBackground = null;
 
public DemoCellRenderer() {
super();
setOpaque(true);
}
 
public Component getTableCellRendererComponent(
JTable table, Object val,
boolean isSelected, boolean hasFocus,
int row, int column) {
setAlignmentX( CENTER_ALIGNMENT );
 
 
Font f = getFont();
if ( isSelected ) {
setFont( new Font( f.getName(), Font.PLAIN|Font.ITALIC, f.getSize() ) );
 
super.setForeground( ( selectedForeground != null) ? selectedForeground : table.getSelectionForeground() );
super.setBackground( ( selectedBackground != null) ? selectedBackground : table.getSelectionBackground() );
}
else {
setFont( new Font( f.getName(), Font.PLAIN, f.getSize() ) );
if ( ((column)>>1)<<1 == column - (row-((row>>1)<<1)) ) {
super.setForeground( ( unselectedForegroundAlt != null) ? unselectedForegroundAlt : table.getForeground() );
super.setBackground( ( unselectedBackgroundAlt != null) ? unselectedBackgroundAlt : table.getBackground() );
}
else {
super.setForeground( ( unselectedForeground != null) ? unselectedForeground : table.getForeground() );
   super.setBackground( ( unselectedBackground != null) ? unselectedBackground : table.getBackground() );
}
}
setText( (String)val );
return this;
}
}
 
Color foreColor = new Color( 0, 0, 50 );
Hashtable couleur = new Hashtable( 10 );
Color defoBack = new Color( 194, 194, 194);
 
private TableCellRenderer createDemoHeaderRenderer() {
DefaultTableCellRenderer label = new
DefaultTableCellRenderer() {
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
setText((value == null) ? "" : value.toString());
if (table != null) {
JTableHeader header = table.getTableHeader();
if (header != null) {
 
Color back = (Color)couleur.get( getText() );
setForeground( foreColor );
setBackground( (back==null)?defoBack:back );
setFont(header.getFont());
}
}
setBorder(UIManager.getBorder("TableHeader.cellBorder"));
return this;
}
};
label.setHorizontalAlignment(JLabel.CENTER);
return label;
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
// Add your handling code here:
String user=jTextField1.getText();
char[] passwd=jPasswordField1.getPassword();
connect(user,passwd);
 
}//GEN-LAST:event_jButton1ActionPerformed
 
public void connect(String user,char[] passwd) {
String out=new String();
try {
String pass = new String(passwd);
if (user.compareTo("")==0)
{jTextPane1.setText("Enter a valid username/password please");
return;}
 
 
out="Connecting to the JDBC driver\n";
Class.forName("com.mysql.jdbc.Driver").newInstance();
out=out+"Driver com.mysql.jdbc.Driver loaded\n";
      String pass1 = new String(passwd);
try {
out=out+"Connecting to database\n";
connection = DriverManager.getConnection("jdbc:mysql://127.0.0.1/snort",user, pass1);
out=out+"Database connected\n";
} catch (SQLException ex) {
out = out + "Your user/password is not correct, try again please";
}
} catch (Exception ex) {
jTextPane1.setText("Driver loading failed\n");
}
jTextPane1.setText(out);
}
 
String lireFichier(String fic) {
FileReader fr = null;
LineNumberReader reader = null;
 
 
try {
fr = new FileReader(fic);
reader = new LineNumberReader(fr);
}
catch (FileNotFoundException e) {
reader = null;
ecrireOut(fic+" (fichier introuvable)");
return("");
}
 
String res = "";
String line;
try {
for (;;) {
line = reader.readLine();
if (line == null) break;
res += line+"\r\n";
}
}
catch (IOException e) {
ecrireOut(fic+" (lecture imposible)");
}
try {
reader.close();
fr.close();
}
catch (IOException e) {
ecrireOut(fic+" (fermeture impossible)");
}
reader = null;
return(res);
}
 
/** Exit the Application */
private void exitForm(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_exitForm
try {
Toolkit.getDefaultToolkit().beep();
int reply = JOptionPane.showConfirmDialog(this,
"Do you really want to quit?",
"Interface MySql - Quit" ,
JOptionPane.YES_NO_OPTION,
JOptionPane.QUESTION_MESSAGE);
if (reply == JOptionPane.YES_OPTION) {
System.exit(0);
}
} catch (Exception e) {
}
}//GEN-LAST:event_exitForm
 
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
new Connect().show();
}
 
 
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JButton jButton4;
private javax.swing.JButton jButton5;
private javax.swing.JButton jButton6;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
private javax.swing.JPanel jPanel4;
private javax.swing.JPasswordField jPasswordField1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JScrollPane jScrollPane3;
private javax.swing.JTable jTable1;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextPane jTextPane1;
private javax.swing.JTextPane jTextPane2;
  Connect connect1 = new Connect();
 
  private void jbInit() throws Exception {
    this.setLocale(java.util.Locale.getDefault());
    this.setState(Frame.NORMAL);
    this.getContentPane().setLayout(null);
  }
 
// End of variables declaration//GEN-END:variables
 
}
et quand je l'exécute cette erreur s'affiche :
Exception in thread "main" java.lang.OutOfMemoryError
svp dites moi ou est l'erreur et comment la réctifier c urgent et merci.