On Wednesday 17 March 2004 12:53 am, Mario St-Gelais wrote: > Kaustubh Ghosh wrote: > >I am quite novice towards java programming in linux.To start with I > > installed j2re1.4.2_03 and also j2sdk1.4.2_04 in FC1(Both from > > java.sin.com).Now peculiar problems arise. > >When I type "java -version" it gives 1.3.1( > >When I type "/usr/java/j2sdk1.4.2_04/bin/java -version" it gives 1.4.2_04. > >Anyway I can compile any .java file with javac. > >But when I try to run it with java(any of the above) the gui would not > >come.(Hello World executes perfectly with System.out.println as also other > >non-gui programs). > > > >I also installed eclipse sdk.It created a directory "eclipse" under > > /opt.When I cycled to the directory and typed "eclipse" I got messages > >" > >warning:cannot determine -os type > >warning:cannot determine -ws type. > >warning:cannot determine -arch type. > >warning:cannot determine -showsplash type. > >" > >After a while it gives an error(in a gui): > >"Error:Java (VM) had to be shut down:Exit Code=1 > >/usr/bin/java > >-cp /opt/eclipse/startup.jar org.eclipse.core.launcher.Main > >-os linux > >-ws gtk > >-arch x86 > >-showsplash /opt/eclipse/eclipse_showsplash 600 > >" > > > >Cannot make any head or tail of it. > >I also tried to install Netbeans developer using "nbdx2_21.class" file by > >giving command "java nbdx2_21".What I got was: > >"Exception in thread "main" java.lang.NoClassDefFoundError: nbdx2_21" > > > >Can I get any help?Thanks in advance. > > You might have 2 versions of java installed... Have you set environment > variables? (JAVA_HOME). What do you get when you do "echo $JAVA_HOME"? > Also, note that when you install j2sdk, jre comes with it. But I dont't > think that this is the problem. > > For the second part, not sure... When I isuue the command $JAVA_HOME I get nothing.(just a blank line). How can I set the environment variables?Consider me a novice.Thanks.
