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Thread: Java Applet and MySQL

  1. #1
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    Default Java Applet and MySQL

    I'm working on a simple inventory program using a Java applet that connects to a MySQL database. Program works fine if I just compile and run it from Netbeans, but it is throwing an exception once I add an applet wrapper.

    The java console is only spitting out "createGUI didn't complete successfully" and not the stacktrace or exception message that I need for troubleshooting. What gives?

    I've had TONS of trouble getting the html applet tag to work at all. Is this method antiquated?

    Developing an Applet (The Java™ Tutorials > Deployment > Applets)


    <html>
    <head>
    <title>
    Testing Page for Java Applet
    </title>
    </head>
    <body>
    <p>Begin body...</p>
     
       <applet code="sqlconnection.appletWrapper.class" width=400 height=400 archive="SQLConnection.jar>
       <hr>
       Replacement Text
       <hr>
       </applet>
     
    <p>End body...</p>
    </body>
    </html>

    /*
     * To change this template, choose Tools | Templates
     * and open the template in the editor.
     */
    package sqlconnection;
     
    /**
     *
     * @author Master
     */
    import javax.swing.JApplet;
    import javax.swing.SwingUtilities;
     
    public class appletWrapper extends JApplet {
        //Called when this applet is loaded into the browser.
        @Override
        public void init() {
            //Execute a job on the event-dispatching thread; creating this applet's GUI.
            try {
                SwingUtilities.invokeAndWait(new Runnable() {
                    public void run() {
                        createGUI();
                    }
                });
            } catch (Exception e) {
                System.out.println(e.getMessage());
                e.printStackTrace();
                System.out.println(e.toString());
                System.out.println("createGUI didn't complete successfully");
            }
        }
     
        private void createGUI() {
            //Create and set up the content pane.
            System.out.println("inside createGUI");
            MainPanel newContentPane = new MainPanel();
            newContentPane.setOpaque(true); 
            setContentPane(newContentPane);
            System.out.println("leaving createGUI");
        }
    }


  2. #2
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    Default Re: Java Applet and MySQL

    My great thanks to this post. The code given by you is very useful. It is nice combination of Java applet
    and MySQL. I find code very useful. I really appreciate your work. I am sure many people will find it very useful.

  3. #3
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    Default Re: Java Applet and MySQL

    Thanks! I never did get it to work reliably. The program is fantastic in a JFrame, but moving it into an applet really didn't work out for me. What does your HTML look like?

  4. #4
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    Default Re: Java Applet and MySQL

    java console is only spitting out "createGUI didn't complete successfully"
    The code shows that it also does a printStackTrace() in the catch block.
    The problem would be shown in that stack trace message. What was the full contents of the java console?

  5. #5
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    Default Re: Java Applet and MySQL

    That's why I was specific about what was in the console. That's it. No stack trace printed. This was a long time ago and I don't even have the applet code anymore.

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