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Home » Newcomers » Newcomers » Window Builder. HELP ME!(Errors at starting WindowBuilder and JFrame)
Window Builder. HELP ME! [message #1836564] Thu, 07 January 2021 15:01 Go to next message
Maxim Lukmanov is currently offline Maxim LukmanovFriend
Messages: 3
Registered: January 2021
Junior Member
Hello. I am sorry for my English. I am beginner. Eclipse for Java. 2020-12 (4.18.0)
My starting project. Problems with the WindowBuilder and JFrame. Please help me!

import javax.swing.JFrame;

public class GameGame extends JFrame {

public static void main(String[] args) {
// TODO Auto-generated method stub


The parser parsed the compilation unit, but can't identify any GUI toolkit.

Possible reasons:
•You open a compilation unit without any GUI, such as an empty class, data bean, etc.
•Classpath of project is not valid, does not include all required toolkit libraries.
•You attempt to open UI for toolkit, support for which is not installed in WindowBuilder.
Use button Show UI Toolkits to install new toolkit.

Besides three errors, on screenshot,
Thank you.
  • Attachment: question.png
    (Size: 66.46KB, Downloaded 29 times)
Re: Window Builder. HELP ME! [message #1836575 is a reply to message #1836564] Thu, 07 January 2021 18:34 Go to previous message
Ed Merks is currently offline Ed MerksFriend
Messages: 31864
Registered: July 2009
Senior Member
It will better to ask on the Window Builder forum:

Ed Merks
Professional Support:
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