Can't resolve jdk.internal package

java, netbeans

Solution

This is javac's restriction. By default, javac does not read classes from rt.jar. It reads from a symbol file, which only contains standard API and some internal API (e.g. com.sun., com.oracle. and sun.*).

To disable this mechanism, I can use javac `-XDignore.symbol.file=true` option.

For Maven, edit POM file like the following.

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-compiler-plugin</artifactId>
  <configuration>
    <compilerArgument>-XDignore.symbol.file</compilerArgument>
  </configuration>
</plugin>

Now, I can build project without error, but Error notification remains on NetBeans editor UI. To remove these error, I append `-J-DCachingArchiveProvider.disableCtSym` option in NETBEANS_HOME/etc/netbeans.conf file.

netbeans_default_options="... -J-DCachingArchiveProvider.disableCtSym=true"

Finally, I removed all error from NetBeans environment.

Problem

Original source

Related problems

• Using internal sun classes with javac