This error means that the X server referenced in your DISPLAY variable refused 
to allow the installer to open a window.  Typically this is caused by the X11
process running under a different username than the username which is attempting
to install JBuilder.  This is an X11 security feature which must be pacified or
disabled before the installer will function.

An easy workaround is to issue the command "xhost +" in an existing window on
the X display, using a shell which is logged in under the same username as which
launched the X11 process.  "xhost +" tells the X11 process that any host and 
user may open a window on the display.  


Complete error message:

[jamie@joi cdrom]$  ./install_linux
Xlib: connection to "joi:0.0" refused by server
Xlib: Client is not authorized to connect to Server
LAX: Method.invoke() threw an InvocationTargetException:
java.lang.InternalError: Can't connect to X11 window server using 'joi:0.0' as the value of the DISPLAY variable.
        at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
        at sun.awt.X11GraphicsEnvironment.clinit(X11GraphicsEnvironment.java:58)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java, Compiled Code)
        at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:59)
        at java.awt.Font.initializeFont(Font.java:258)
        at java.awt.Font.init(Font.java:288)
        at javax.swing.plaf.metal.DefaultMetalTheme.init(DefaultMetalTheme.java:55)
        at javax.swing.plaf.metal.MetalLookAndFeel.createDefaultTheme(MetalLookAndFeel.java:705)
        at javax.swing.plaf.metal.MetalLookAndFeel.getDefaults(MetalLookAndFeel.java:709)
        at javax.swing.UIManager.setLookAndFeel(UIManager.java:359)
        at javax.swing.UIManager.setLookAndFeel(UIManager.java:386)
        at com.borland.integration.tools.launcher.launcher.main(launcher.java:47)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.zerog.lax.LAX.a([DashoPro-V1.2-120198])
        at com.zerog.lax.LAX.main([DashoPro-V1.2-120198])
LAX: exiting.