Bug 156005

Are you sure you are using libgcj-4.0.0-1?
With that and java-1.4.2-gcj-compat-1.4.2.0-40jpp_18rh it works just fine for me:
import java.awt.*;
import java.awt.event.*;

class HelloAWT extends Frame {

   private static String message = "Hello AWT!";

   HelloAWT() {
      super(message);
   }

   public void paint(Graphics g) {
      // get the windows width and height
      Dimension d = getSize();
      // get the internal margins
      Insets i = getInsets();
      // calculate the center point
      int cx = i.left + (d.width - i.left - i.right) / 2;
      int cy = i.top + (d.height - i.top - i.bottom) / 2;
      // get the attributes of the text
      FontMetrics fm = g.getFontMetrics();
      // get the width of the message
      int width = fm.stringWidth(message);
      int height = fm.getHeight();
      // draw the string
      g.drawString(message, cx - width / 2, cy + height / 2);
   }

   public static void main(String[] args) {
      // create the window
      Frame f = new HelloAWT();
      // insert event handler for exiting the application
      f.addWindowListener(
         new WindowAdapter(){
            public void windowClosing(WindowEvent e) {
               System.exit(0);
            }
         });
      f.setBounds(50, 50, 200, 200);
      f.show();
   }
}

rpm -q gcc libgcj java-1.4.2-gcj-compat; java -cp `pwd` HelloAWT
gcc-4.0.0-1
libgcj-4.0.0-1
java-1.4.2-gcj-compat-1.4.2.0-40jpp_18rh

(.:16278): Gtk-WARNING **: cannot open display:

(this is without X running, but from strace the Gtk peers are clearly loaded).
gcc-4.0.0-1 certainly has the patch mentioned in 150453.

As sure as I can be...

[user@computer ~]$ date
Wed Apr 27 15:01:54 BST 2005
[user@computer ~]$ yum -e gcc
   (snip...)
[user@computer ~]$ yum install gcc libgcj java-1.4.2-gcj-compat-devel
   (snip...)
[user@computer ~]$ rpm -q gcc libgcj java-1.4.2-gcj-compat
gcc-4.0.0-1
libgcj-4.0.0-1
java-1.4.2-gcj-compat-1.4.2.0-40jpp_18rh
[user@computer ~]$ javac HelloAWT.java && java -cp `pwd` HelloAWT
----------
1. WARNING in HelloAWT.java
 (at line 4)
        class HelloAWT extends Frame {
              ^^^^^^^^
The serializable class HelloAWT does not declare a static final serialVersionUID
field of type long
----------
1 problem (1 warning)Exception in thread "main" java.awt.AWTError: Cannot load
AWT toolkit: gnu.java.awt.peer.gtk.GtkToolkit
   at java.awt.Toolkit.getDefaultToolkit() (/usr/lib64/libgcj.so.6.0.0)
   at java.awt.Window.getToolkit() (/usr/lib64/libgcj.so.6.0.0)
   at java.awt.Frame.addNotify() (/usr/lib64/libgcj.so.6.0.0)
   at java.awt.Window.show() (/usr/lib64/libgcj.so.6.0.0)
   at HelloAWT.main(java.lang.String[]) (Unknown Source)
   at .main (/usr/lib64/libgij.so.6.0.0)
   at .__libc_start_main (/lib64/libc-2.3.5.so)
Caused by: java.lang.ClassNotFoundException: gnu.java.awt.peer.gtk.GtkToolkit
not found in gnu.gcj.runtime.SystemClassLoader{urls=[file:/home/da/],
parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}
   at java.net.URLClassLoader.findClass(java.lang.String)
(/usr/lib64/libgcj.so.6.0.0)
   at java.lang.ClassLoader.loadClass(java.lang.String, boolean)
(/usr/lib64/libgcj.so.6.0.0)
   at java.lang.ClassLoader.loadClass(java.lang.String) (/usr/lib64/libgcj.so.6.0.0)
   at java.lang.Class.forName(java.lang.String, boolean, java.lang.ClassLoader)
(/usr/lib64/libgcj.so.6.0.0)
   at java.awt.Toolkit.getDefaultToolkit() (/usr/lib64/libgcj.so.6.0.0)
   ...6 more
[user@computer ~]$ export LD_LIBRARY_PATH=/usr/lib/gcc//x86_64-redhat-linux/4.0.0
[user@computer ~]$ java -cp `pwd` HelloAWT
   (success...)

Can you post e.g. strace output?
I'm not alone who can't reproduce this problem.

Created attachment 113885 [details]
Output from strace -f -v -o java.output java --cp $(pwd) HelloAWT

Okay, attached is output from:

$ strace -f -v -o java.output java --cp $(pwd) HelloAWT

FWIW I just deleted the entire partition and installed FC4test3:

[da@testsys ~]$ rpm -q gcc libgcj java-1.4.2-gcj-compat
gcc-4.0.0-2
libgcj-4.0.0-2
libgcj-4.0.0-2
java-1.4.2-gcj-compat-1.4.2.0-40jpp_18rh

and I _still_ get the same problem.  Would you like an strace of that, too?

I think libgcj is looking in /usr/lib for lib-gnu-java-awt-peer-gtk.so, when it
should be looking in /usr/lib64.

Jakub, this should be fixable in the libgcj RPM, right?

I'm seeing this type of problem with fc4t3 + may 23 updates.

neuromancer> java -jar bin/rmmlite.jar
Exception in thread "main" java.awt.AWTError: Cannot load AWT toolkit:
gnu.java.awt.peer.gtk.GtkToolkit
   at java.awt.Toolkit.getDefaultToolkit() (/usr/lib64/libgcj.so.6.0.0)
   at java.awt.EventQueue.invokeLater(java.lang.Runnable)
(/usr/lib64/libgcj.so.6.0.0)
   at javax.swing.SwingUtilities.invokeLater(java.lang.Runnable)
(/usr/lib64/libgcj.so.6.0.0)
   at javax.swing.RepaintManager.addInvalidComponent(javax.swing.JComponent)
(/usr/lib64/libgcj.so.6.0.0)
   at javax.swing.JComponent.revalidate() (/usr/lib64/libgcj.so.6.0.0)
   at javax.swing.JComponent.setOpaque(boolean) (/usr/lib64/libgcj.so.6.0.0)
   at javax.swing.JPanel.JPanel(java.awt.LayoutManager, boolean)
(/usr/lib64/libgcj.so.6.0.0)
   at javax.swing.JRootPane.createGlassPane() (/usr/lib64/libgcj.so.6.0.0)
   at javax.swing.JRootPane.getGlassPane() (/usr/lib64/libgcj.so.6.0.0)
   at javax.swing.JRootPane.JRootPane() (/usr/lib64/libgcj.so.6.0.0)
   at javax.swing.JFrame.createRootPane() (/usr/lib64/libgcj.so.6.0.0)
   at javax.swing.JFrame.getRootPane() (/usr/lib64/libgcj.so.6.0.0)
   at javax.swing.JFrame.frameInit() (/usr/lib64/libgcj.so.6.0.0)
   at javax.swing.JFrame.JFrame(java.lang.String) (/usr/lib64/libgcj.so.6.0.0)
   at com.rio.rmmlite.ChooseRmmlOrTaxi.main(java.lang.String[]) (Unknown Source)
  at .main (/usr/lib64/libgij.so.6.0.0)
   at .__libc_start_main (/lib64/libc-2.3.5.so)
Caused by: java.lang.ClassNotFoundException: gnu.java.awt.peer.gtk.GtkToolkit
not found in
gnu.gcj.runtime.SystemClassLoader{urls=[file:bin/rmmlite.jar,file:./],
parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}
   at java.net.URLClassLoader.findClass(java.lang.String)
(/usr/lib64/libgcj.so.6.0.0)
   at java.lang.ClassLoader.loadClass(java.lang.String, boolean)
(/usr/lib64/libgcj.so.6.0.0)
   at java.lang.ClassLoader.loadClass(java.lang.String) (/usr/lib64/libgcj.so.6.0.0)
   at java.lang.Class.forName(java.lang.String, boolean, java.lang.ClassLoader)
(/usr/lib64/libgcj.so.6.0.0)
   at java.awt.Toolkit.getDefaultToolkit() (/usr/lib64/libgcj.so.6.0.0)
   ...16 more
neuromancer>

I got the same error as you.
But now I can compile and run java awt program after I ran this command:
ln -s gcc/x86_64-redhat-linux/4.0.0/lib-gnu-java-awt-peer-gtk.so /usr/lib/
Will this could be a hint?

os: fc4 x86-64
gcc(gcj): 4.0.0-8

I deleted FC4test3 and install FC4 as released, installed on a fresh partition.
 I get the same problem,
$ rpm -q gcc libgcj java-1.4.2-gcj-compat
gcc-4.0.0-8
libgcj-4.0.0-8
libgcj-4.0.0-8
java-1.4.2-gcj-compat-1.4.2.0-40jpp_31rh

I did another strace -f, it appears to me that when it comes to opening
lib-gnu-java-awt-peer-gtk.so, it is looking in /usr/lib, and trying to load the
32-bit version, then failing.  Successfully loaded libs are being looked for in
/usr/lib64...  Here's an excerpt from the trace, if it helps:
6907  access("/usr/lib/lib-gnu-java-awt-peer-gtk.so.6", R_OK) = 0
6907  access("/usr/lib/lib-gnu-java-awt-peer-gtk.so.6", R_OK) = 0
6907  open("/usr/lib/lib-gnu-java-awt-peer-gtk.so.6", O_RDONLY) = 13
6907  read(13, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0000y\3\000"...,
640) = 640
6907  close(13)                         = 0 6907 
open("/lib/lib-gnu-java-awt-peer.la", O_RDONLY) = -1 ENOENT (No such file or
directory)

This seems to be where the trouble starts.

Should be fixed in libgcj-4.0.0-13 in rawhide.
As a workaround, you can run the Java programs with LD_LIBRARY_PATH=/usr/lib64

*** Bug 163671 has been marked as a duplicate of this bug. ***