Which import statement is necessary to display a message dialog box in Java?

The import statement needed to display a message dialog box in Java is specifically designed to provide access to the JOptionPane class, which is part of the javax.swing package. This class offers a straightforward way to create dialog boxes for user interaction. When you include the statement that imports javax.swing.JOptionPane, you gain the ability to utilize methods such as showMessageDialog, which is essential for displaying messages as pop-up dialog boxes in a graphical user interface.

The other options do not provide the necessary functionality for this task. The java.awt package, for instance, contains components for creating graphical user interfaces but does not include JOptionPane. The import statement for java.io.File relates to file input and output operations, which is not relevant to displaying dialog boxes. Lastly, java.util.Scanner is used for obtaining input from various sources, such as the keyboard, but it also bears no relation to displaying dialogs. Therefore, the correct choice directly targets the need for a dialog interface in Java programming.