Cobertura fails to build with Java9

[hansjoachim]

When attempting to build current master (642a46e) with OpenJDK9 9~b80-2, it fails in Cobertura code coverage module with the following error message:

[ERROR] Failed to execute goal on project cobertura: Could not resolve dependencies for project net.sourceforge.cobertura:cobertura:jar:2.1.2-SNAPSHOT: Could not find artifact com.sun:tools:jar:0 at specified path /usr/lib/jvm/java-9-openjdk-amd64/../lib/tools.jar -> [Help 1]

Since JDK9 will no longer include tools.jar, this should probably be looked into.

This was previously mentioned in #121 (by @mshuler and me), but I didn't see any replies so I've filed a separate issue now.

[alphafoobar]

I'm seeing a similar error using cobertura as a maven plugin with JDK-9.

[ERROR] Failed to execute goal org.codehaus.mojo:cobertura-maven-plugin:2.7:clean (default) on project spotbugs-maven-plugin: Execution default of goal org.codehaus.mojo:cobertura-maven-plugin:2.7:clean failed: Plugin org.codehaus.mojo:cobertura-maven-plugin:2.7 or one of its dependencies could not be resolved: Could not find artifact com.sun:tools:jar:0 at specified path /Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home/../lib/tools.jar

[AlanBateman]

tools.jar was indeed removed in JDK 9. All the details are in JEP 220. JDK 9 Early Access builds were available since late 2014 with this change (to give tools that depend on it as much time as possible to digest the change).