Javadoc NullPointerException

[Lou Pellegrini]

Hi,

I get a NullPointerException when I try to Generate Javadoc my entire project.



The project is titled DBConnections and Project Explorer shows it like this.

DBConnections
    src
        (default package)
            ConnectionTest.java
            MySQLConnectionTest.java
        demo.database
            ConnectionPool.java
            DBConstants.java

When I select either (default package) or demo.database it works fine, but of course the javadoc of the other package is not included. When I select both I get the NullPointerException.

Can someone help please?

[Wouter Oet]

It might help if you tell us how you invoked the javadoc tool and where you get the exception (including stack-trace).

[Lou Pellegrini]

Hi Wouter,

I'll answer that as best I can. Let me know if I can provide more information.

I invoked javadoc from Eclipse menu Project >> Generate Javadoc

Here's the stack trace from the Eclipse console

java.lang.NullPointerException
at com.sun.tools.doclets.formats.html.PackageUseWriter.generatePackageUse(PackageUseWriter.java:180)
at com.sun.tools.doclets.formats.html.PackageUseWriter.generatePackageList(PackageUseWriter.java:124)
at com.sun.tools.doclets.formats.html.PackageUseWriter.generatePackageUse(PackageUseWriter.java:110)
at com.sun.tools.doclets.formats.html.PackageUseWriter.generatePackageUseFile(PackageUseWriter.java:99)
at com.sun.tools.doclets.formats.html.PackageUseWriter.generate(PackageUseWriter.java:78)
at com.sun.tools.doclets.formats.html.ClassUseWriter.generate(ClassUseWriter.java:116)
at com.sun.tools.doclets.formats.html.HtmlDoclet.generateOtherFiles(HtmlDoclet.java:92)
at com.sun.tools.doclets.internal.toolkit.AbstractDoclet.startGeneration(AbstractDoclet.java:122)
at com.sun.tools.doclets.internal.toolkit.AbstractDoclet.start(AbstractDoclet.java:64)
at com.sun.tools.doclets.formats.html.HtmlDoclet.start(HtmlDoclet.java:42)
at com.sun.tools.doclets.standard.Standard.start(Standard.java:23)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sun.tools.javadoc.DocletInvoker.invoke(DocletInvoker.java:269)
at com.sun.tools.javadoc.DocletInvoker.start(DocletInvoker.java:143)
at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:340)
at com.sun.tools.javadoc.Start.begin(Start.java:128)
at com.sun.tools.javadoc.Main.execute(Main.java:41)
at com.sun.tools.javadoc.Main.main(Main.java:31)

[Wouter Oet]

It's a bug. See this. The javaDoc has been updated with Java 7 so maybe that may have fixed it.

[Lou Pellegrini]

Thank you Wouter!

Now this issue has stopped and I'm getting my javadoc.

But I'll keep this in mind in case I see it again.