JAVA Upgrading Problem

[Apoorvbarwa]

i have ubuntu 8.10 firefox 3.0.7
i downloaded jre-6u13-linux-i586.bin in /home/apoorv/java
then typed ./jre-6u13-linux-i586.bin

this made a directory /home/apoorv/java/jre1.6.0_13
in terminal i typed
export JAVA_HOME=/home/apoorv/java/jre1.6.0_13
export JRE_HOME=/home/apoorv/java/jre1.6.0_13

on typing echo $JAVA_HOME i get
/home/apoorv/java/jre1.6.0_13

and echo $JRE_HOME
/home/apoorv/java/jre1.6.0_13

echo $JDK_HOME
/home/apoorv/jdk1.6.0_13/


but in System--->Prefrences--->Sun Java 6 Plugin Control Panel
in under Java tab---> Java Applet Runtime Settings---->View
i can see under product name two jre
JRE 1.6.0_13 /home/apoorv/java/jre1.6.0_13----> enabled
JRE 1.6.0_10 /usr/lib/jvm/java-6-sun-1.6.0.10/jre------>enabled
i disabled the second one....and also removed it but still whenever i see it again it comes back.....same is true with the JNLP settings
and whenever i check version of java in--->General tab "about" it shows me Version 6 Update 10 (build 1.6.0_10-b33)
please tell me what m i doing wrong......

also i have installed openlaszlo-4.2.0.2-unix.tar.gz----->extracted to /home/apoorv/lps-4.2.0.2

and ide4laszlo-allInOne-gtk-lps4.0.10_jre.zip----->extracted to /home/apoorv/eclipse

tomcat directory---> /home/apoorv/lps-4.2.0.2/Server/tomcat-5.0.24/bin/startup.sh------->sometimes this works
and i can also view hello.lzx from http://www.openlaszlo.org/lps4.2/docs/installation/run.html

but i cannot get eclipse to work......in File--->New---->Project----->Laszlo Project----name
when i add an .lzx file to src
it shows me Error opening the editor. and in details shows
java.lang.NullPointerException

please help me out with these queries

[yeats]

This may help (from here (https://help.ubuntu.com/community/Java)):


Just installing new Java flavours does not change the default Java pointed to by /usr/bin/java. You must explicitly set this:

* Open a Terminal window
* Run sudo update-java-alternatives -l to see the current configuration and possibilities.
* Run sudo update-java-alternatives -s XXXX to set the XXX java version as default. For Sun Java 6 this would be sudo update-java-alternatives -s java-6-sun
* Run java -version to ensure that the correct version is being called.

You can also use the following command to interactively make the change;

* Open a Terminal window
* Run sudo update-alternatives --config java
* Follow the onscreen prompt

[Apoorvbarwa]

this is what i did
apoorv@apoorv-desktop:~$ sudo update-java-alternatives -l
java-6-openjdk 1061 /usr/lib/jvm/java-6-openjdk
java-6-sun 63 /usr/lib/jvm/java-6-sun
apoorv@apoorv-desktop:~$

and neither of them have the update version...........which is in /home/apoorv/jre1.6.0_13

apoorv@apoorv-desktop:~$ sudo update-alternatives --config java

There are 2 alternatives which provide `java'.

Selection Alternative
-----------------------------------------------
1 /usr/lib/jvm/java-6-sun/jre/bin/java
*+ 2 /usr/lib/jvm/java-6-openjdk/jre/bin/java

this also asks for a selection wherein i cannot put the path
plzz help

also plz can anyone help me in setting up eclipse........thats my main concern

[Apoorvbarwa]

this is wat i did.....
apoorv@apoorv-desktop:~$ echo $JAVA_HOME
/home/apoorv/jdk1.6.0_13
apoorv@apoorv-desktop:~$ /home/apoorv/lps-4.2.0.2/Server/tomcat-5.0.24/bin/startup.sh
Using CATALINA_BASE: /home/apoorv/lps-4.2.0.2/Server/tomcat-5.0.24
Using CATALINA_HOME: /home/apoorv/lps-4.2.0.2/Server/tomcat-5.0.24
Using CATALINA_TMPDIR: /home/apoorv/lps-4.2.0.2/Server/tomcat-5.0.24/temp
Using JAVA_HOME: /home/apoorv/jdk1.6.0_13

apoorv@apoorv-desktop:~$ java -version
java version "1.6.0_0"
IcedTea6 1.3.1 (6b12-0ubuntu6.4) Runtime Environment (build 1.6.0_0-b12)
OpenJDK Client VM (build 1.6.0_0-b12, mixed mode, sharing)

does this mean that java environment variable is set ??????
still my java version is not 1.6.0_13.......

[Apoorvbarwa]

i get this error in my eclipse--path/home/apoorv/eclipse

java.lang.NullPointerException
at org.eclipse.ui.internal.browser.BrowserViewer.home (BrowserViewer.java:264)
at org.eclipse.ui.internal.browser.BrowserViewer.setU RL(BrowserViewer.java:650)
at org.eclipse.ui.internal.browser.BrowserViewer.setU RL(BrowserViewer.java:287)
at org.eclipse.ui.internal.browser.WebBrowserEditor.c reatePartControl(WebBrowserEditor.java:80)
at org.eclipse.laszlo.rct.editor.ve.VisualEditor.crea tePartControl(VisualEditor.java:206)
at org.eclipse.ui.part.MultiPageEditorPart.addPage(Mu ltiPageEditorPart.java:190)
at org.eclipse.ui.part.MultiPageEditorPart.addPage(Mu ltiPageEditorPart.java:160)
at org.eclipse.laszlo.rct.editor.RCTMultiPageEditor.c reateEditorPages(RCTMultiPageEditor.java:1092)
at org.eclipse.laszlo.rct.editor.RCTMultiPageEditor.c reatePages(RCTMultiPageEditor.java:187)
at org.eclipse.ui.part.MultiPageEditorPart.createPart Control(MultiPageEditorPart.java:283)
at org.eclipse.ui.internal.EditorReference.createPart Helper(EditorReference.java:661)
at org.eclipse.ui.internal.EditorReference.createPart (EditorReference.java:426)
at org.eclipse.ui.internal.WorkbenchPartReference.get Part(WorkbenchPartReference.java:592)
at org.eclipse.ui.internal.PartPane.setVisible(PartPa ne.java:299)
at org.eclipse.ui.internal.presentations.PresentableP art.setVisible(PresentablePart.java:179)
at org.eclipse.ui.internal.presentations.util.Present ablePartFolder.select(PresentablePartFolder.java:2 68)
at org.eclipse.ui.internal.presentations.util.LeftToR ightTabOrder.select(LeftToRightTabOrder.java:65)
at org.eclipse.ui.internal.presentations.util.TabbedS tackPresentation.selectPart(TabbedStackPresentatio n.java:400)
at org.eclipse.ui.internal.PartStack.refreshPresentat ionSelection(PartStack.java:1256)
at org.eclipse.ui.internal.PartStack.setSelection(Par tStack.java:1209)
at org.eclipse.ui.internal.PartStack.showPart(PartSta ck.java:1604)
at org.eclipse.ui.internal.PartStack.add(PartStack.ja va:499)
at org.eclipse.ui.internal.EditorStack.add(EditorStac k.java:103)
at org.eclipse.ui.internal.PartStack.add(PartStack.ja va:485)
at org.eclipse.ui.internal.EditorStack.add(EditorStac k.java:112)
at org.eclipse.ui.internal.EditorSashContainer.addEdi tor(EditorSashContainer.java:63)
at org.eclipse.ui.internal.EditorAreaHelper.addToLayo ut(EditorAreaHelper.java:217)
at org.eclipse.ui.internal.EditorAreaHelper.addEditor (EditorAreaHelper.java:207)
at org.eclipse.ui.internal.EditorManager.createEditor Tab(EditorManager.java:774)
at org.eclipse.ui.internal.EditorManager.openEditorFr omDescriptor(EditorManager.java:673)
at org.eclipse.ui.internal.EditorManager.openEditor(E ditorManager.java:634)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEdit orBatched(WorkbenchPage.java:2719)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEdit or(WorkbenchPage.java:2633)
at org.eclipse.ui.internal.WorkbenchPage.access$12(Wo rkbenchPage.java:2625)
at org.eclipse.ui.internal.WorkbenchPage$10.run(Workb enchPage.java:2577)
at org.eclipse.swt.custom.BusyIndicator.showWhile(Bus yIndicator.java:67)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(W orkbenchPage.java:2572)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(W orkbenchPage.java:2556)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(W orkbenchPage.java:2547)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:644)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:603)
at org.eclipse.laszlo.rct.script.ui.edit.EditorUtilit y.openInEditor(EditorUtility.java:239)
at org.eclipse.laszlo.rct.script.ui.edit.EditorUtilit y.openInEditor(EditorUtility.java:159)
at org.eclipse.laszlo.rct.script.ui.actions.OpenActio n.run(OpenAction.java:138)
at org.eclipse.laszlo.rct.script.ui.actions.OpenActio n.run(OpenAction.java:124)
at org.eclipse.laszlo.rct.script.ui.actions.Selection DispatchAction.dispatchRun(SelectionDispatchAction .java:102)
at org.eclipse.laszlo.rct.script.ui.actions.Selection DispatchAction.run(SelectionDispatchAction.java:84 )
at org.eclipse.laszlo.rct.script.ui.explorer.ScriptEx plorerActionGroup.handleOpen(ScriptExplorerActionG roup.java:225)
at org.eclipse.laszlo.rct.script.ui.explorer.Explorer Part$5.open(ExplorerPart.java:372)
at org.eclipse.jface.viewers.StructuredViewer$2.run(S tructuredViewer.java:820)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner .java:37)
at org.eclipse.core.runtime.Platform.run(Platform.jav a:857)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil. java:46)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnab le.java:193)
at org.eclipse.jface.viewers.StructuredViewer.fireOpe n(StructuredViewer.java:818)
at org.eclipse.jface.viewers.StructuredViewer.handleO pen(StructuredViewer.java:1079)
at org.eclipse.jface.viewers.StructuredViewer$6.handl eOpen(StructuredViewer.java:1183)
at org.eclipse.jface.util.OpenStrategy.fireOpenEvent( OpenStrategy.java:263)
at org.eclipse.jface.util.OpenStrategy.access$2(OpenS trategy.java:257)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent( OpenStrategy.java:297)
at org.eclipse.swt.widgets.EventTable.sendEvent(Event Table.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.ja va:1101)
at org.eclipse.swt.widgets.Display.runDeferredEvents( Display.java:3319)
at org.eclipse.swt.widgets.Display.readAndDispatch(Di splay.java:2971)
at org.eclipse.ui.internal.Workbench.runEventLoop(Wor kbench.java:2389)
at org.eclipse.ui.internal.Workbench.runUI(Workbench. java:2353)
at org.eclipse.ui.internal.Workbench.access$4(Workben ch.java:2219)
at org.eclipse.ui.internal.Workbench$4.run(Workbench. java:466)
at org.eclipse.core.databinding.observable.Realm.runW ithDefault(Realm.java:289)
at org.eclipse.ui.internal.Workbench.createAndRunWork bench(Workbench.java:461)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(Pl atformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplica tion.start(IDEApplication.java:106)
at org.eclipse.equinox.internal.app.EclipseAppHandle. run(EclipseAppHandle.java:153)
at org.eclipse.core.runtime.internal.adaptor.EclipseA ppLauncher.runApplication(EclipseAppLauncher.java: 106)
at org.eclipse.core.runtime.internal.adaptor.EclipseA ppLauncher.start(EclipseAppLauncher.java:76)
at org.eclipse.core.runtime.adaptor.EclipseStarter.ru n(EclipseStarter.java:363)
at org.eclipse.core.runtime.adaptor.EclipseStarter.ru n(EclipseStarter.java:176)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.eclipse.equinox.launcher.Main.invokeFramework( Main.java:504)
at org.eclipse.equinox.launcher.Main.basicRun(Main.ja va:443)
at org.eclipse.equinox.launcher.Main.run(Main.java:11 69)
at org.eclipse.equinox.launcher.Main.main(Main.java:1 144)

does this mean that the java environment variable is not set?????
plz help:confused: