Java Flashcard I

Front

What type of Java Swing Layout is this? Options: FlowLayout, BoxLayout, GridLayout, BorderLayout

Back

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

Front

What type of Java Swing Layout is this? Options: FlowLayout, CardLayout, GridLayout, BorderLayout

Back

GridLayout

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.

Front

Which method is used to handle clicks on JButton?

Back

addActionListener()

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.

Front

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

Back

JTextField

Answer explanation

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

Front

What Java Swing component performs an action after the user clicks it? Options: JTextInput, JButton, JLabel, JPanel

Back

JButton

Answer explanation

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

Front

Which of the following is a valid way to create a JButton in Java Swing? Options: JButton button = new JButton("Click Me");, JButton button = new Button("Click Me");, Button button = new JButton("Click Me");, JButton button = new Button("Click Me");

Back

JButton button = new JButton("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.

Front

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

Back

add()

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.

Front

Which method is used to make a JFrame visible?

Back

setVisible(true)

Answer explanation

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

Front

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

Back

JFrame

Answer explanation

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

Front

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.

Back

JTextArea supports multi-line input

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.