this is an AWT incornation of bug filed agains SWT (https://bugs.eclipse.org/bugs/show_bug.cgi?id=170459)

The sample shows a window with one SWT text area and an AWT text are.
If you run it with Java 5, the focus listener on the embedded AWT component
properly reports when the component gains and looses focus. In Java 6, you have
to click twice to transfer focus to the AWT component.

Steps to reproduce:
- Run the sample and click the AWT text area. In Java 5, the component gets
focus (you see a notification on the console). In Java 6 (the final version),
the component doesn't get focus; click for the second time to make that happen.
- Click the SWT text area. Focus is lost both in Java 5 an 6.
- Click the AWT text area. Again, focus is gained in Java 5 but not Java 6.

The test:

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Frame;
import java.awt.Panel;
import java.awt.TextArea;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.lang.reflect.InvocationTargetException;

import org.eclipse.swt.SWT;
import org.eclipse.swt.awt.SWT_AWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class SwtAwtFocusTest {

    public static void main(String[] args) throws InterruptedException,
                                                  InvocationTargetException
    {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setLayout(new FillLayout(SWT.VERTICAL));

        Composite awtComposite = new Composite(shell, SWT.NO_BACKGROUND
                                               | SWT.EMBEDDED);

        Text text = new Text(shell, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL);
        text.setEditable(true);
        text.setText("SWT text area");

        final Frame frameRef = SWT_AWT.new_Frame(awtComposite);

        EventQueue.invokeAndWait(new Runnable() {
                public void run() {
                    Panel panel = new Panel(new BorderLayout());
                    frameRef.add(panel);

                    TextArea textArea = new TextArea("AWT text area");
                    panel.add(textArea);

                    textArea.addFocusListener(new FocusListener() {
                            public void focusGained(FocusEvent e) {
                                System.out.println("Focus gained");
                            }

                            public void focusLost(FocusEvent e) {
                                System.out.println("Focus lost");
                            }
                        });
                }
            });

        shell.setSize(500, 500);
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}