Comp 274 Week 2 Essay

769 Words Aug 31st, 2014 4 Pages
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COMP/274 Week 2 - Inheritance and Polymorphism
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The objective of this programming assignment is to experience the use of inheritance in Java and to see how polymorphism works with inheritance in Java.
The assignment involves writing three classes, plus a test class. The base class is a TaxableWorker class which contains a couple of attributes and methods common to all workers. The first derived class is a StateTaxableWorker which adds state tax information to a TaxableWorker. The second
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0.05). An explicit value constructor must be provided to set the three values of the base class plus the values for the state name and state tax rate. A mutator method must be provided to change the value of the state tax rate. The base class workerInfo method must be overridden to include all the base class worker information plus the state name and state tax rate information. The base class taxWithheld method must be overridden to include the base class tax withheld plus the state tax withheld (gross pay * state tax rate).
The LocalTaxableWorker class inherits from the StateTaxableWorker class. This class adds attributes for the city name and the city tax rate (ie. 0.025). An explicit value constructor must be provided to set the three values of the base class plus the two values for the state name and state tax rate plus the city name and the city tax rate. A mutator method must be provided to change the value of the city tax rate. The base class workerInfo method must be overridden to include all the state worker information (which includes base class info) plus the city name and city tax rate information. The base class taxWithheld method must be overridden to include the state tax withheld (which includes the base tax withheld) plus the city tax withheld (gross pay * city tax rate).
The test program needs to create a StateTaxableWorker object and a LocalTaxableWorker object. The test program must contain a display method which

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