Using an IDE and Java please code up this with "place holder" names in place for the method classes and anything else. J

[answerhappygod]

Using an IDE and Java please code up this with "place holder"
names in place for the method classes and anything else. Just
distinguish what terms correlate to what please!
Create a call called "TestHarness". Modify the
TestHarness constructor so that it instantiates and tests two of
your model classes. The tests should be completely relative to the
functionality of the classes, i.e., they should
test every method in each
class.