how to connect scala applet with html file?

Im trying to make a simple scala applet from the following code:

import javax.swing._
object ScalaAppletMain extends JApplet{
val sa = new App
override def init(){
    val pane = getContentPane()
    pane.add("Center",sa)
}
override def start(){}
override def stop(){}
}

(please note that this code is heavily relaying on web examples and im only trying to learn how to do it) and the app class:

import javax.swing._
import java.awt._
class App extends JPanel {
    var number = 2229999
  initialize()

  private def initialize() {
   var text = new JLabel(number.toString)
   v开发者_运维百科ar panel = new JPanel()
  panel.setLayout(new BorderLayout(1,1))
  panel.add(text)
  add(panel)
}}

and the code for my html file:

<applet>
    archive="ScalaAppletMain.class,app.class,scala-library.jar"
    width="660"
    height="500"
</applet>

however it doesnt work, any help please?

For a start the applet element should have the attributes inside the opening tag not the body.

<applet
    archive="ScalaAppletMain.class,app.class,scala-library.jar"
    width="660"
    height="500">
</applet>

Then, to find any other issues, you're going to have to find the console output for your Java applet environment and look to see if it is logging any errors - they should give you a clue.

For example on the Mac, the Java Preferences app has an (Advanced) option to show the console when an Applet is loaded.