CODEWITHSUNDEEP
javaeclipseapplet
チーズパン
チーズパン

Reputation: 2778

Why doesn't this Applet show a thing?

import java.awt.*;
import java.applet.*;

public class IdrawApplet extends Applet  {  
Button myButton;
Panel pPanel;

  public void init() {
    myButton=new Button("Clear");
    pPanel = new Panel();
    pPanel.setLayout(new BorderLayout());
    pPanel.add(myButton,BorderLayout.NORTH);
  }
}

Why dont't I see anything when I run it? Plus I get a strange Warning.

"The serializable class IdrawApplet does not declare a static final serialVersionUID field of type long."

Thanks in advance

Upvotes: 0

Views: 501

Answers (3)

camickr
camickr

Reputation: 324118

Why don't I see anything when I run it?

You don't add the panel to the applet.

Since you are just learning applets, why don't you start by creating a Swing applet instead of an AWT applet. Read the section from the Swing tutorial on How to Make Applets for a working example to get you started.

Upvotes: 3

MByD
MByD

Reputation: 137322

You added the button to the panel, but you didn't add the panel to the applet:

add(pPanel);

Upvotes: 2

janhink
janhink

Reputation: 5023

You have to add the panel to the applet itself using its add() method.

You can (almost safely) ignore the warning or just add this to the class's variables:

private static final long serialVersionUID = 1L;

Upvotes: 2

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