Java Swing Components Quiz

Java Swing

• A built-in package in Java used to create a window-based application or GUI application.
• An enhanced and improved version of AWT.

Java Swing Components

• Components include: JPanel, JCheckBox, JLabel, JButton, JTextField, JList, JTable, JPasswordField, and more.

Java Frame (JFrame)

• A Java Swing container that allows creation of a window.
• Commonly used methods in JFrame:
  • setTitle(String a) sets the title of the Frame.
  • setSize(width, height) customizes the size of the Frame.
  • setLocationRelativeTo(null) sets the frame on center/input after setSize.
  • add(Component comp) adds a swing component in JFrame.
  • remove(Component comp) removes a swing component in JFrame.
  • setResizable(Boolean resizable) controls whether the user can resize the frame.
  • setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE) with options: DO_NOTHING_ON_CLOSE, HIDE_ON_CLOSE, EXIT_ON_CLOSE, DISPOSE_ON_CLOSE.
  • setVisible(Boolean e) makes the frame visible on screen (true) or hides it (false).

Java Panel (JPanel)

• A Java Swing container that stores a group of components.
• Commonly used methods in JPanel:
  • setSize(width, height) customizes the size of the panel.
  • add(Component comp) adds a swing component in panel.
  • setResizable(Boolean resizable) controls whether the user can resize the panel.

Java Label (JLabel)

• A Java Swing component that displays text and can display an image.
• Can be customized according to its Font, Size, and Color.
• Commonly used methods in JLabel:
  • setText(String s) sets the text on the label.
  • getText() returns the text the label will display.
  • setIcon(Icon i) sets the icon that the label will display.
  • getIcon() returns the image that the label displays.
  • setFont(new Font(“Font Name”, Font.BOLD, FontSize)) customizes font.
  • setHorizontalAlignment(SwingConstants.) sets horizontal alignment (LEFT, CENTER, RIGHT, LEADING, TRAILING).
  • setVerticalAlignment(SwingConstants.) sets vertical alignment (TOP, CENTER, BOTTOM).
  • setForeground(Color c) sets the color.

Java Button (JButton)

• A labeled button that generates an event when pressed or clicked.
• Commonly used methods in JButton:
  • setText(String s) sets the text on the label.
  • getText() returns the text the label will display.
  • setIcon(Icon i) sets the icon that the label will display.
  • getIcon() returns the image that the label displays.
  • setEnabled(Boolean b) enables or disables the button.
  • addActionListener(this) adds an action listener to this object.
  • addActionListener(new ActionListener(){}) for multiple buttons.

Test your knowledge on Java Swing and its components such as JFrame, JPanel, JLabel, and JButton. Explore the basics of creating window-based applications and GUIs using Java Swing.