Question

What is the last statement of the main method if you use the JOptionPane class in Java?

a) System.exit(0);
b) return 0;
c) JOptionPane.showMessageDialog(null, "Program complete.");
d) None of the above

Answer 1

The correct last statement of the main method when using the JOptionPane class in Java is System.exit(0), which indicates that the program has ended successfully (option a).

Step-by-step explanation:

The student is asking about the last statement of the main method when using the JOptionPane class in Java. When working with GUI (Graphical User Interface) applications in Java, it is common to use JOptionPane for simple dialog windows. However, the correct way to end a GUI Java program is to ensure that all of the program's processing has been completed and its resources have been released. Therefore, the correct last statement in this context would be System.exit(0); This statement (a) properly terminates the program and indicates that it has finished successfully with a status code of 0.

Hence, the answer is option a.