RE: How to use swing classes without X-server
1. Use JDK1.4 with its new headless command line option 2. Use one of the psuedo-X servers (search the list archives, this has been discussed numerous times and names of options and installation directions should be listed). Randy -Original Message- From: Serge A. Redchuk [mailto:[EMAIL PROTECTED]] Sent: Tuesday, March 05, 2002 10:40 AM To: [EMAIL PROTECTED] Subject: How to use swing classes without X-server Hello All ! I want to use some of Swing classes like import javax.swing.tree.TreeModel; import javax.swing.tree.TreePath; by tomcat in environment where no X-server running. And I see in catalina.out: java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable. at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method) at sun.awt.X11GraphicsEnvironment.clinit(X11GraphicsEnvironment.java:5 9) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:120) at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvi ronment.java:58) at sun.awt.motif.MToolkit.clinit(MToolkit.java:57) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:120) at java.awt.Toolkit$2.run(Toolkit.java:512) at java.security.AccessController.doPrivileged(Native Method) at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:503) at java.awt.Toolkit.getEventQueue(Toolkit.java:1150) at java.awt.EventQueue.invokeLater(EventQueue.java:511) at javax.swing.SwingUtilities.invokeLater(SwingUtilities.java:1091) at javax.swing.Timer.post(Timer.java:342) at javax.swing.TimerQueue.postExpiredTimers(TimerQueue.java:195) at javax.swing.TimerQueue.run(TimerQueue.java:231) at java.lang.Thread.run(Thread.java:484) Huh !! I do not need X-server !!! I just want to use a pair of Swing classes. Anybody know what to do ??? -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Re: How to use swing classes without X-server
Serge A. Redchuk wrote: Hello All ! I want to use some of Swing classes like import javax.swing.tree.TreeModel; import javax.swing.tree.TreePath; by tomcat in environment where no X-server running. snip Huh !! I do not need X-server !!! I just want to use a pair of Swing classes. Anybody know what to do ??? 1) Wait until java 1.4 is solid enough to use in anger, I believe it gets around this problem. 2) Run the Xvfb (X Virtual Frame Buffer) on your server, and set the DISPLAY environment variable appropriately. We had to do this to get our farm nodes (no graphics) working properly. Tom -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
RE: How to use swing classes without X-server
Serge A. Redchuk [mailto:[EMAIL PROTECTED]] wrote: Hello All ! I want to use some of Swing classes like import javax.swing.tree.TreeModel; import javax.swing.tree.TreePath; by tomcat in environment where no X-server running. And I see in catalina.out: java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable. at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method) at ... at javax.swing.TimerQueue.run(TimerQueue.java:231) at java.lang.Thread.run(Thread.java:484) You can use the _model_ classes from Swing without any problem as long as you _never_ call any real GUI-classes. What you see here is Swing starting its backgroud notification Thread. Look in your code what classes you actually use. (JTree would be fatal DefaultMutableTreeNode would be ok.) In case you abosultely _must_ use Graphics (like awt.image.) You can use your existsing X-Server for testing. In a live system you should use an Offscreen X-Server (such a thing comes with Linux for such purposes). | Business Operation Systems GmbH | _ / | / \ \ Klaus Halfmann, Dipl. Inform. | |/ / | | \_/ | Tel. +49(0)69-24779-0 Fax +49(0)69-24779-444 \ / [EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
