Error when running Rhino
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20-09-2019 - |
Question
I have downloaded and compiled the newest version of Rhino by going
ant compile
ant jar
When I run it like so I get the following error
java -jar js.jar
Rhino 1.7 release 2 2009 05 12
Exception in thread "main" java.lang.NullPointerException
at org.mozilla.javascript.Kit.classOrNull(Kit.java:92)
at org.mozilla.javascript.tools.shell.ShellLine.getStream(ShellLine.java:65)
at org.mozilla.javascript.tools.shell.Global.getIn(Global.java:829)
at org.mozilla.javascript.tools.shell.Main.processSource(Main.java:385)
at org.mozilla.javascript.tools.shell.Main.processFiles(Main.java:196)
at org.mozilla.javascript.tools.shell.Main$IProxy.run(Main.java:117)
at org.mozilla.javascript.Context.call(Context.java:515)
at org.mozilla.javascript.ContextFactory.call(ContextFactory.java:507)
at org.mozilla.javascript.tools.shell.Main.exec(Main.java:179)
at org.mozilla.javascript.tools.shell.Main.main(Main.java:157)
Also $JAVAHOME
points to /usr/lib/jvm/java-6-sun
Solution
There's a bug in that version of rhino that affects some versions on Linux. It fails when trying to load the jLine library (for command-line editing and completion). There's a patch that fixes the problem and was merged into CVS at https://bugzilla.mozilla.org/show_bug.cgi?id=495785. Unfortunately, I think jLine support will be broken, since it's not finding the class loader.
OTHER TIPS
Java 6 is shipped with a JS api based on Rhino. Check it out.
PS: It works darn well.
Do you really mean $JAVAHOME? Or do you mean to say $JAVA_HOME?
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