Getting "cannot resolve" errors with java.swing

[Eleeist]

Hello,

I am trying to create a simple window using swing.

I get this errors when trying to compile:

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
    SwingUtilities cannot be resolved
    JFrame cannot be resolved to a type
    JLabel cannot be resolved to a type
    JButton cannot be resolved to a type

    at SwingExample.main(SwingExample.java:12)

Could someone please explain to me what is happening?

import java.awt.FlowLayout;

import java.swing.JButton;
import java.swing.JFrame;
import java.swing.JLabel;
import java.swing.SwingUtilities;

public class SwingExample {
    
    public static void main(String[] args) {
        
        SwingUtilities.invokeLater(new Runnable() {
            
            public void run() {
                
                JFrame f = new JFrame("Swing Example Window");
                
                f.setLayout(new FlowLayout());
                
                f.add(new JLabel("Hello world!"));
                
                f.add(new JButton("Press me!"));
                
                f.pack();
                
                f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                
                f.setVisible(true);
                
            }
            
        });
        
    }
    
}

[Fubarable]

I'm surprised that the imports didn't cause errors because Swing imports shouldn't be java.swing.XXX but javax.swing.XXX.

So change this:

import java.awt.FlowLayout;
 
import java.swing.JButton;
import java.swing.JFrame;
import java.swing.JLabel;
import java.swing.SwingUtilities;

to this:

import java.awt.FlowLayout;
 
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;

or

import java.awt.FlowLayout;
 
import javax.swing.*;

Note that the awt imports do not derive from javax but rather from java as you are doing now -- so don't change them.

[Eleeist]

It works now. Thank you :)

Hmm.. Surprisingly I took the code from Wikipedia. Do they have the wrong code there?

[Fubarable]

It works now. Thank you :)

You're welcome!

Hmm.. Surprisingly I took the code from Wikipedia. Do they have the wrong code there?

Look for yourself -- what do you see?

[Eleeist]

I could swear these x were not there an hour ago...

[Fubarable]

I could swear these x were not there an hour ago...

Queue the music to The Twilight Zone...