First you will need to develop a GUI form like the picture below:

 

 

Your GUI Form must have the Frame Icon and add any color to any one of the GUI Components.

 

Then, you will need to generate an external class file. Here the class Diagram:

 

As you in the GUI Form, you will have 2 buttons: the first will calculate the Total cost of the trip using the information entered by the user in the GUI Form. You must to generate an Instance of the TravelCost class using the information gathered in the GUI Form (Don't Forget to do the proper type conversion). Then, It will show the Total Cost in the Result TextField. The Second Button will clear all TextFields.

 

Then add the JMenu to add the MenuItem to Calculate cost and Clear the TextFields.

Travel Cost App ver. 2.0 File Edit TRAVEL COST APP Miles to Drive : Mile per gallon : Gasoline Price : Parking Cost: Tolls Cost: Calculate Result: Clear X