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Thread: How to printing a Jtable

  1. #1
    Junior Member
    Join Date
    May 2009
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    Default How to printing a Jtable

    I'M having problem on how to print a JTable that retrieves data from the database. ff is my code:
    import java.sql.Connection;
    import java.sql.DriverManager;
    import java.sql.ResultSet;
    import java.sql.SQLException;
    import java.sql.Statement;
    import javax.swing.JTable;
    /*
    * NewJFrame.java
    *
    * Created on January 5, 2009, 8:58 AM
    */

    /**
    *
    * @author ATAGHER B T ace
    */
    public class NewJFrame extends javax.swing.JFrame {
    String select = "SELECT * FROM ver;";
    String url = "jdbc:mysql://localhost:3306/test";
    String driver ="com.mysql.jdbc.Driver";
    String user = "root";
    String password = "val";
    Statement stmt ;


    /** Creates new form NewJFrame */
    public NewJFrame() {
    try{
    Class.forName(driver);
    }catch(java.lang.ClassNotFoundException ex){
    System.err.println("class not found");
    System.err.println(ex.getMessage());
    }
    Connection con;
    try{
    con=DriverManager.getConnection(url, user, password);
    stmt = con.createStatement();
    }catch(SQLException ex){ex.printStackTrace();}


    initComponents();
    reload();
    }

    /** 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.
    */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents
    private void initComponents() {
    jScrollPane1 = new javax.swing.JScrollPane();
    jTable1 = new javax.swing.JTable();
    jButton1 = new javax.swing.JButton();

    setDefaultCloseOperation(javax.swing.WindowConstan ts.EXIT_ON_CLOSE);
    jTable1.setModel(new javax.swing.table.DefaultTableModel(
    new Object [][] {
    {null, null},
    {null, null},
    {null, null},
    {null, null}
    },
    new String [] {
    "name", "sex"
    }
    ) {
    Class[] types = new Class [] {
    java.lang.String.class, java.lang.String.class
    };
    boolean[] canEdit = new boolean [] {
    false, false
    };

    public Class getColumnClass(int columnIndex) {
    return types [columnIndex];
    }

    public boolean isCellEditable(int rowIndex, int columnIndex) {
    return canEdit [columnIndex];
    }
    });
    jScrollPane1.setViewportView(jTable1);

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

    org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
    layout.createParallelGroup(org.jdesktop.layout.Gro upLayout.LEADING)
    .add(layout.createSequentialGroup()
    .addContainerGap()
    .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 354, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
    .addContainerGap(36, Short.MAX_VALUE))
    .add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
    .addContainerGap(255, Short.MAX_VALUE)
    .add(jButton1)
    .add(90, 90, 90))
    );
    layout.setVerticalGroup(
    layout.createParallelGroup(org.jdesktop.layout.Gro upLayout.LEADING)
    .add(layout.createSequentialGroup()
    .add(37, 37, 37)
    .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 181, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
    .add(22, 22, 22)
    .add(jButton1)
    .addContainerGap(37, Short.MAX_VALUE))
    );
    pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
    // TODO add your handling code here:
    dispose();
    }//GEN-LAST:event_jButton1ActionPerformed


    private void reload() {

    jScrollPane1.getViewport().remove(jTable1);
    String [] tablehead ={ "name", "sex"};
    String[][] tablebody = new String[getrows()][2];
    int j = 0;
    try{
    ResultSet rs = stmt.executeQuery(select);
    while(rs.next()){
    tablebody[j][0] = rs.getString("name");
    tablebody[j][1] = rs.getString("sex");
    j++;


    }
    }catch(Exception ex){}

    jTable1 = new JTable(tablebody, tablehead);
    jScrollPane1.getViewport().add(jTable1);
    repaint();

    }
    int getrows(){
    int i = 0;
    try{
    ResultSet rs = stmt.executeQuery(select);
    while(rs.next()){
    i++;
    }
    }catch(Exception ex){}

    return i;
    }
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable jTable1;
    // End of variables declaration//GEN-END:variables

    }
    Last edited by hundu; June 29th, 2009 at 08:07 AM. Reason: not yet solved


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