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  1. #1
    themburu is offline Member
    Join Date
    Mar 2008
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    Default how to take query results to a jlist!!

    Hi I do know if Im doing the right thing but I am returning my queries to a JList in my MySQL databse editor GUI prg but its not working how do you achieve this and by the way do you use a JList??
    The dream of being a legend has just begun!

  2. #2
    themburu is offline Member
    Join Date
    Mar 2008
    Rep Power

    Default the code

    here's ma code its from netbeans.

    Java Code:
    /*first i'm using two Jbuttons,
     *the first buttons reads the selected database to connect to from a JComboBox; 1 being MySql
     *	it thus retrives the username, passwd and database to connect and executes the connection
     *the second is to run the entered queries but for development purposes I have had to define a standard query
     *this query should return results as shown in previous thread but now in a JTextArea called myans.
    private void mycActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_mycActionPerformed
           String myname = new String(""+ uname.getText()) ;
           String mypasswd = new String(""+ passwd.getText()) ;
           String mydb = new String(""+ dbname.getText()) ;
    //Ceck if the username has been provided
    if (myname!=""){
        //parameters to connect to the database
        int chos = mychoices.getSelectedIndex();
        if (chos == 1){ 
            try {
            String driver = "com.mysql.jdbc.Driver";
            String url = "jdbc:mysql://localhost/"+mydb;
            java.sql.DriverManager.getConnection( url, myname, mypasswd ); 
          catch( Exception x ) {
        else if (chos == 2){
        JOptionPane.showMessageDialog(this,"You are not allowed to connect to PostgeSQL","Configuration Error",JOptionPane.ERROR_MESSAGE);
        else if (chos == 3){
        JOptionPane.showMessageDialog(this,"You are not allowed to connect to Oracle","Configuration Error",JOptionPane.ERROR_MESSAGE);
    //If no username show error!    
    else if (myname == ""){
     JOptionPane.showMessageDialog(this,"Please give atlease a user name","ENTRY PROBLEM!",JOptionPane.ERROR_MESSAGE);
    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
    myans.setText("Here comes the results \n");
    StringBuffer message = new StringBuffer("");
    Connection conn = null;
    Statement stmt = null;
                //StringBuffer message = new StringBuffer("");
                stmt = conn.createStatement();
                ResultSet rs = stmt.executeQuery("SELECT name, owner FROM pet");
                //ResultSetMetaData metaData = resultSet.getMetaData();
                //int numberOfColumns = metaData.getColumnCount(); 
                ResultSetMetaData metaData = rs.getMetaData();
                int numberOfColumns = metaData.getColumnCount();
                myans.setText("Column count is :" + numberOfColumns +"\n");
               /* while ( )
                    for ( int i = 1; i <= numberOfColumns; i++ )
                   myans.setText("Column count is :" + rs.getObject(i) +"\n");
                while ( {
                //String entry = rs.getString(1);
                String s = rs.getString("name");
                String f = rs.getString("owner");
            String hdss = message.toString();
            catch (SQLException e) {
                System.exit( 1 );
    finally // ensure statement and connection are closed properly
       try  {                                                          
           } // end try                                               
     catch ( Exception exception )  {                                                          
          System.exit( 1 );                                       
           } // end catch                                             
            } // end finally 
    i've also tried to make sure that the username is not null and give an error message, I've used if with !="" and !=null but none works.

    For the Jtextarea i've even tried StringBuffer.
    So pls help me.
    The dream of being a legend has just begun!

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