Pass the $CLASSPATH environment variable to java. (#1468)

This is necessary to use third-party packages.

Co-authored-by: Kyle Kelley <[email protected]>

Author: schackbrian2012

lib/grammars/java.coffee

@@ -19,7 +19,8 @@ module.exports =
         sourcePath = GrammarUtils.Java.getProjectPath context
         if windows
           return ["/c javac -Xlint #{context.filename} && java #{className}"]
-        else ['-c', "javac -J-Dfile.encoding=UTF-8 -sourcepath '#{sourcePath}' -d /tmp '#{context.filepath}' && java -Dfile.encoding=UTF-8 -cp /tmp #{classPackages}#{className}"]
+        else ['-c', "javac -J-Dfile.encoding=UTF-8 -sourcepath '#{sourcePath}' -d /tmp '#{context.filepath}' && java -Dfile.encoding=UTF-8 -cp /tmp:%CLASSPATH #{classPackages}#{className}"]
+
     }
   Kotlin:
     'Selection Based': {