B4J Question SLC BADoclet.writeClass java.lang.NullPointerException

MicroDrie · Apr 16, 2023

When I try to create a jar file with SLC, this part goes to creating the xml documentation file. I have the latest software version of both the SLC program and the C:\Program Files\Java\jdk1.8.0_361\bin\javac.exe version. How do I get rid of the error message?

SLC BADoclet.writeClass java.lang.NullPointerException:

Starting step: Compiling Java code.
Completed successfully.
Starting step: Creating jar file.
Completed successfully.
Starting step: Creating XML file.
java.lang.NullPointerException
    at BADoclet.writeClass(BADoclet.java:192)
    at BADoclet.start(BADoclet.java:415)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.sun.tools.javadoc.DocletInvoker.invoke(DocletInvoker.java:310)
    at com.sun.tools.javadoc.DocletInvoker.start(DocletInvoker.java:189)
    at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:366)
    at com.sun.tools.javadoc.Start.begin(Start.java:219)
    at com.sun.tools.javadoc.Start.begin(Start.java:205)
    at com.sun.tools.javadoc.Main.execute(Main.java:64)
    at com.sun.tools.javadoc.Main.main(Main.java:54)

Error.

Erel · Apr 17, 2023

B4J is configured to use Java 8, right?

Does your project include Java classes except of your wrappers? If so then hide them with the @Hide annotation. Not all features of Java classes are supported by the doclet tool.

MicroDrie · Apr 17, 2023

B4J is configured to use Java 8, right?

Yes

Does your project include Java classes except of your wrappers?

Yes, indeed there are three public interfaces which have all three a public static class

If so then hide them with the @Hide annotation

I search the forum and the Internet for documentation how to use the @Hide option. I try to write @Hide just before the class:

Doclet @Hide option:

   @Hide("Checker")
   public static class Checker implements TypeQualifierValidator<RegEx> {

This gives me the following error:

Doclet error:

Starting step: Compiling Java code.
javac 1.8.0_361
D:\Data\1 B4X SLC\SimpleLibraryCompiler\SimpleLibraryCompiler\javax\src\javax\annotation\Nonnegative.java:18: error: cannot find symbol
@Hide("Checker")
 ^
  symbol:   class Hide
  location: @interface Nonnegative
1 error


Error.

So what is the correct place and format for the Doclet @hide option?

agraham · Apr 17, 2023

Make sure you have this import in your code
import anywheresoftware.b4a.BA.Hide;
Then just use it as below

Java:

 import anywheresoftware.b4a.BA.Hide;
 //...
 @Hide
public static class Checker implements TypeQualifierValidator<RegEx> {

B4J Question SLC BADoclet.writeClass java.lang.NullPointerException

MicroDrie

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Erel

B4X founder

MicroDrie

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agraham

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B4J Question SLC BADoclet.writeClass java.lang.NullPointerException

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