InvalidCategoryException.java Requirements and Design: InvalidCategoryException is a user defined exception created by extending the Exception class. This exception is to be thrown and caught in the readPlayerFile method in the SoftballTeam class when a line of input data contains an invalid player category. The constructor for InvalidCategoryException takes a single String parameter representing category and invokes the super constructor with the following String: "For category: " + "\"" + category + "\"" This string will be the toString() value of an InvalidCategoryException when it occurs.