Thread View: comp.lang.java.gui
2 messages
2 total messages
Started by Daniel
Fri, 19 Mar 1999 00:00
NullPointerException???!!!
Author: Daniel
Date: Fri, 19 Mar 1999 00:00
Date: Fri, 19 Mar 1999 00:00
71 lines
2969 bytes
2969 bytes
Hi, I've problems to run an applet with netscape4.5 JDK1.1.2 Plugin. I'm working with JBuilder1. Netscape only show me a part of the headbar, but not the whole GUI-frame, what can be wrong? Here are the html-File and the JavaConsoleWindow. If anybody can help me, thanks a lot. Daniel html-file: <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <META NAME="GENERATOR" CONTENT="Mozilla/4.05 [en] (WinNT; I) [Netscape]"> <TITLE>HTML Test Page </TITLE> </HEAD> <BODY> The Graphical-User-Interface will appear below in a Java enabled browser. <BR><APPLET CODEBASE = "myclasses/archive" ARCHIVE = "jbcl-rt.zip, jclass.zip, jgl.zip" CODE = "GUI.class" NAME = "TestApplet" WIDTH = 400 HEIGHT = 300 HSPACE = 0 VSPACE = 0 ALIGN = middle ></APPLET> </BODY> </HTML> JavaConsoleWindow: java.lang.NullPointerException at sun.awt.windows.WToolkit.prepareScrImage(Compiled Code) at sun.awt.windows.WToolkit.prepareImage(Compiled Code) at java.awt.Component.prepareImage(Compiled Code) at java.awt.Component.prepareImage(Compiled Code) at borland.jbcl.control.ImageControl.setupImage(Compiled Code) at borland.jbcl.control.ImageControl.setImageName(Compiled Code) * at Login.jbInit(Compiled Code) at Login.<init>(Compiled Code) at GUI.start(Compiled Code) at netscape.applet.DerivedAppletFrame$StartAppletEvent.dispatch(Compiled Code) at java.awt.EventDispatchThread$EventPump.dispatchEvents(Compiled Code) at java.awt.EventDispatchThread.run(Compiled Code) at netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(Compiled Code)
Re: NullPointerException???!!!
Author: Xinyi Xu
Date: Tue, 23 Mar 1999 00:00
Date: Tue, 23 Mar 1999 00:00
80 lines
3210 bytes
3210 bytes
It is because that you use borland.jbcl.control.ImageControl.* package which is not supported by Java-Plugin 1.2. After it throws the NullPointerException, it stops to execute the remaining codes, that is why you can only see partial your applet. Xinyi Daniel wrote: > Hi, > > I've problems to run an applet with netscape4.5 JDK1.1.2 Plugin. > I'm working with JBuilder1. Netscape only show me a part of the headbar, > but not the whole GUI-frame, what can be wrong? > Here are the html-File and the JavaConsoleWindow. If anybody can help > me, thanks a lot. > Daniel > > html-file: > > <HTML> > <HEAD> > <META HTTP-EQUIV="Content-Type" CONTENT="text/html; > charset=iso-8859-1"> > <META NAME="GENERATOR" CONTENT="Mozilla/4.05 [en] (WinNT; I) > [Netscape]"> > <TITLE>HTML Test Page > </TITLE> > </HEAD> > <BODY> > The Graphical-User-Interface will appear below in a Java enabled > browser. > <BR><APPLET > CODEBASE = "myclasses/archive" > ARCHIVE = "jbcl-rt.zip, jclass.zip, jgl.zip" > CODE = "GUI.class" > NAME = "TestApplet" > WIDTH = 400 > HEIGHT = 300 > HSPACE = 0 > VSPACE = 0 > ALIGN = middle > ></APPLET> > </BODY> > </HTML> > > JavaConsoleWindow: > > java.lang.NullPointerException > > at sun.awt.windows.WToolkit.prepareScrImage(Compiled Code) > > at sun.awt.windows.WToolkit.prepareImage(Compiled Code) > > at java.awt.Component.prepareImage(Compiled Code) > > at java.awt.Component.prepareImage(Compiled Code) > > at borland.jbcl.control.ImageControl.setupImage(Compiled Code) > > at borland.jbcl.control.ImageControl.setImageName(Compiled Code) > > * at Login.jbInit(Compiled Code) > > at Login.<init>(Compiled Code) > > at GUI.start(Compiled Code) > > at > netscape.applet.DerivedAppletFrame$StartAppletEvent.dispatch(Compiled > Code) > > at java.awt.EventDispatchThread$EventPump.dispatchEvents(Compiled > Code) > > at java.awt.EventDispatchThread.run(Compiled Code) > > at > netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(Compiled > Code)
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