Java Quiz I

What type of Java Swing Layout is this?

• FlowLayout

• BoxLayout

• GridLayout

• BorderLayout

Answer explanation

A BorderLayout lays out a container, arranging and resizing its components to fit in five regions: north, south, east, west, and center. Each region may contain no more than one component, and is identified by a corresponding constant: NORTH, SOUTH, EAST, WEST, and CENTER

What type of Java Swing Layout is this?

• FlowLayout

• CardLayout

• GridLayout

• BorderLayout

Answer explanation

A GridLayout object places components in a grid of cells. Each component takes all the available space within its cell, and each cell is exactly the same size.

Which method is used to handle clicks on JButton?

• add()

• addActionListener()

• setDefaultCloseOperation()

• show()

Answer explanation

The addActionListener() method is used to handle clicks on a JButton. It registers an ActionListener that executes code when the button is clicked.

What Java Swing component refers to a single-line text input field?

• JTextField

• JTextArea

• JPanel

• JLabel

Answer explanation

JTextField is a Swing component used for single-line text input

What Java Swing component performs an action after the user clicks it?

• JTextInput

• JButton

• JLabel

• JPanel

Answer explanation

JButton is a Swing component that performs an action when clicked. It triggers an ActionEvent, which can be handled using an ActionListener.

Which of the following is a valid way to create a JButton in Java Swing?

• JButton button = new JButton("Click Me");

• JButton button = new Button("Click Me");

• Button button = new JButton("Click Me");

• JButton button = new Button("Click Me");

Answer explanation

The statement JButton button = new JButton("Click Me"); is a valid way to create a JButton. It initializes a button with the label "Click Me", which the user can click to trigger an action.

Which method is used to add a component to a container in Java Swing?

• addComponent()

• append()

• add()

• put()

Answer explanation

The add() method is used to add a component to a container in Java Swing. It places the component inside the container so it can be displayed in the GUI.

Which method is used to make a JFrame visible?

• setVisible(true)

• showFrame()

• display()

• JFrame.setOn()

Answer explanation

The setVisible(true) method is used to make a JFrame visible. It displays the window on the screen.

Which class in Java Swing is used to create a basic window?

• JPanel

• JFrame

• JButton

• JTextField

Answer explanation

The JFrame class is used to create a basic window in Java Swing. It serves as the main container for GUI applications.

Which of the following statement is true?

• JTextArea is for numbers only

• JTextField supports multi-line input

• JTextArea supports multi-line input

• JTextField and JTextArea are used to display images

Answer explanation

The statement "JTextArea supports multi-line input" is true. JTextArea allows users to enter and display multiple lines of text, unlike JTextField, which is for single-line input.