a. Create a BirdSighting class for the Birmingham Birdwatcher’s Club that includes data fields for a bird species sighted, the number seen, and the day of the year. For example, April 1 is the 91st day of the year, assuming it is not a leap year. The class also includes methods to get each field. In addition, create a default constructor that automatically sets the species to “robin” and the number and day to 1. Save the file as BirdSighting.java. Create an application named TestBirdSighting that demonstrates that each method works correctly. Save the file as TestBirdSighting.java.
b. Create an additional overloaded constructor for the BirdSighting class you created in Exercise 3a. This constructor receives parameters for each of the data fields and assigns them appropriately. Add any needed statements to the TestBirdSighting application to ensure that the overloaded constructor works correctly, save it, and then test it.
c. Create a class with the same functionality as the BirdSighting class, but create the default constructor to call the three-parameter constructor. Save the class as BirdSighting2.java. Create an application to test the new version of the class, and name it TestBirdSighting2.java.
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