Removed rt.jar and tools.jar in JDK 9

Class and resource files previously stored in lib/rt.jar, lib/tools.jar, lib/dt.jar and various other internal JAR files are stored in a more efficient format in implementation-specific files in the lib directory.

The removal of rt.jar and similar files leads to issues in these areas:

Starting from JDK 9, ClassLoader.getSystemResource doesn’t return a URL pointing to a JAR file (because there are no JAR files). Instead, it returns a jrt URL, which names the modules, classes, and resources stored in a runtime image without revealing the internal structure or format of the image.

For example:

ClassLoader.getSystemResource("java/lang/Class.class");