question: protected final void addToolsJarToClasspath ( JvmLauncher java ) throws FileNotFoundException { if ( ! JdkUtils . isOSX ( ) && jvmMajorVersion < 9 ) { java . addClasspathEntries ( JdkUtils . getToolsJar ( getJavaHome ( ) ) ) ; } }
target:  Adds the tools.jar to the classpath, except for Mac OSX and Java 9 or above - As these JVMs do not need the tools.jar.