University of Central Florida (UCF) COP3330 Object Oriented Programming Final Practice Exam

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Which expression correctly instantiates an object of type Ship in Java?

Ship myShip = Ship();

Ship myShip = new Ship();

The correct expression for instantiating an object of type Ship in Java is the one that utilizes the 'new' keyword along with the class constructor. In Java, when you create an instance of a class, you must call the constructor of that class, and this is done using the 'new' keyword followed by the class name and parentheses.

In this case, 'Ship myShip = new Ship();' clearly demonstrates this process. The 'new Ship()' part invokes the constructor for the Ship class, allocating memory for the new Ship object and returning a reference to it. This reference is then assigned to the variable myShip, which is of type Ship.

The other options do not adhere to the correct syntax for object creation in Java. For example, using 'Ship()' lacks the 'new' keyword, which is essential. Similarly, directly assigning to myShip without declaring its type and using 'create Ship()' are not valid Java syntax for creating objects.

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myShip = new Ship();

Ship myShip = create Ship();

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