Java Programming

Which of the following is the correct syntax to create a button using Java Swing?

• Button button = new Button();

• JButton button = new JButton();

• JLabel button = new JLabel();

• JFrame button = new JFrame();

Which of the following is the correct syntax to add a button to a frame in Java GUI?

• frame.add(button);

• button.add(frame);

• new Button().add(frame);

Which of the following is the correct syntax to set the text of a button in Java GUI?

• button.setText("Hello, world!");

• new Button("Hello, world!");

• button.setLabel("Hello, world!");

• button.setTitle("Hello, world!");

Which of the following is the correct syntax to create a label in Java GUI?

• Label label = new Label();

• JButton label = new JButton();

• JFrame label = new JFrame();

Which of the following is the correct syntax to add a label to a frame in Java GUI?

• frame.add(label);

• label.add(frame);

• new Label().add(frame);

Which of the following is not an exception handling keyword in Java?

• try

• catch

• finally

• if

What is the purpose of the try block in exception handling?

• To execute a block of code that may throw an exception

• To catch an exception and handle it

• To execute a block of code that must be executed, regardless of whether an exception is thrown

• To close all resources that were opened in the try block

What is the purpose of the catch block in exception handling?

• To execute a block of code that may throw an exception

• To catch an exception and handle it

• To execute a block of code that must be executed, regardless of whether an exception is thrown

• To close all resources that were opened in the try block

What is the purpose of the finally block in exception handling?

• To execute a block of code that may throw an exception

• To catch an exception and handle it

• To execute a block of code that must be executed, regardless of whether an exception is thrown

What is the difference between checked exceptions and unchecked exceptions in Java?

• Checked exceptions are exceptions that must be handled, while unchecked exceptions are not

• Checked exceptions are exceptions that are thrown by the Java runtime system, while unchecked exceptions are thrown by the programmer

• Checked exceptions are exceptions that can be caught by a try/catch block, while unchecked exceptions cannot