Why is jpype not loading the specified .jar

Question

I cannot load the intended jar. The java class path is not set (None)

I tried to connect to an oracle database with the JDBC driver, but the import of the ojdbc8.jar is failing

Here is my code

jpype.addClassPath('ojdbc8.jar')
jpype.startJVM()

The JVM is starting, but the class path is none

print(jpype.getClassPath())
print(jpype.java.lang.System.out.println("java.class.path"))
print(jpype.JClass("driver.class.Name"))

The output is:

D:\06_Python_Programme\WPy64-3740\notebooks\ojdbc8.jar
None
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-3-ac29a5fbe025> in <module>
      2 print(jpype.getClassPath())
      3 print(jpype.java.lang.System.out.println("java.class.path"))
----> 4 print(jpype.JClass("driver.class.Name"))
      5 print(jpype.JClass('oracle.jdbc.driver.OracleDriver'))

D:\06_Python_Programme\WPy64-3740\python-3.7.4.amd64\lib\site-packages\jpype\_jclass.py in __new__(cls, jc, loader, initialize)
     97 
     98         # Pass to class factory to create the type
---> 99         return _jpype._getClass(jc)
    100 
    101 

TypeError: Class driver.class.Name is not found

If I try the following, the problem stays the same:

jpype.startJVM(jpype.getDefaultJVMPath(), '-Djava.class.path=/ojdbc8.jar')

I would guess that it is an easy fix, but I have no idea how to fix it.