Podcast
Questions and Answers
What layout manager is used in the class check?
What layout manager is used in the class check?
What is the function of the ButtonGroup in the radio class?
What is the function of the ButtonGroup in the radio class?
What type of component is used to create a dropdown box in the Combo class?
What type of component is used to create a dropdown box in the Combo class?
Which component is best suited for selecting one option from many?
Which component is best suited for selecting one option from many?
Signup and view all the answers
What happens when a JButton is pressed?
What happens when a JButton is pressed?
Signup and view all the answers
What is the purpose of a JScrollPane?
What is the purpose of a JScrollPane?
Signup and view all the answers
Which of these descriptions correctly defines JCheckBox?
Which of these descriptions correctly defines JCheckBox?
Signup and view all the answers
What is the statement used to add items to a JComboBox?
What is the statement used to add items to a JComboBox?
Signup and view all the answers
What is a key advantage of using Java Swing over AWT?
What is a key advantage of using Java Swing over AWT?
Signup and view all the answers
In the context of Swing API architecture, what role does the Model play?
In the context of Swing API architecture, what role does the Model play?
Signup and view all the answers
Which of the following is a feature of Swing components?
Which of the following is a feature of Swing components?
Signup and view all the answers
What does the 'Look and Feel' feature of JFC provide?
What does the 'Look and Feel' feature of JFC provide?
Signup and view all the answers
Which statement accurately describes JApplet?
Which statement accurately describes JApplet?
Signup and view all the answers
What is the primary purpose of the Controller in the MVC architecture of Swing?
What is the primary purpose of the Controller in the MVC architecture of Swing?
Signup and view all the answers
Which of the following Swing components does NOT belong to the javax.swing package?
Which of the following Swing components does NOT belong to the javax.swing package?
Signup and view all the answers
What distinguishes the customization feature of Swing components?
What distinguishes the customization feature of Swing components?
Signup and view all the answers
What is the primary purpose of the JLabel class in Java Swing?
What is the primary purpose of the JLabel class in Java Swing?
Signup and view all the answers
Which method of the ImageIcon class retrieves the height of the icon?
Which method of the ImageIcon class retrieves the height of the icon?
Signup and view all the answers
In the context of Java Swing, what is the role of the Container class?
In the context of Java Swing, what is the role of the Container class?
Signup and view all the answers
What happens when a JCheckBox is clicked?
What happens when a JCheckBox is clicked?
Signup and view all the answers
Which method is used to add a component to a content pane in a Container?
Which method is used to add a component to a content pane in a Container?
Signup and view all the answers
What is the consequence of using the setLayout(null) method in a JFrame?
What is the consequence of using the setLayout(null) method in a JFrame?
Signup and view all the answers
What constructor parameter is used to create an ImageIcon from a file?
What constructor parameter is used to create an ImageIcon from a file?
Signup and view all the answers
In the provided JLabel example, what layout manager is being utilized?
In the provided JLabel example, what layout manager is being utilized?
Signup and view all the answers
Study Notes
Swing Components
- Swing is a part of Java Foundation Classes (JFC)
- Used to create window-based applications
- Built on top of AWT (Abstract Windowing Toolkit)
- Platform-independent and lightweight components
-
javax.swingpackage provides swing API classes - Examples:
JButton,JTextField,JRadioButton,JComboBox,JCheckBox,JTabbedPane,JScrollPane,Jtree,JTable,JProgressBar
AWT vs Swing
- AWT components are platform-dependent while Swing components are platform-independent
- AWT components are heavyweight while Swing components are lightweight
- AWT doesn't support pluggable look and feel; Swing supports pluggable look and feel
- AWT provides fewer components compared to Swing; Swing has more powerful components (e.g., tables, lists, scroll panes, color choosers, tabbed panes)
- AWT doesn't follow MVC (Model-View-Controller) design pattern; Swing follows MVC
MVC Architecture
- Swing follows a loosely based MVC architecture
- Model: Represents component data
- View: Represents the visual representation of the component's data
- Controller: Takes user input from the view and modifies the component's data.
- Swing components have a separate Model element, while the View and Controller are combined in the UI elements
Swing Features
- Lightweight: Independent of native OS APIs; rendered using Java code
- Rich controls: Includes more advanced controls (e.g., trees, tabbed panes, sliders)
- Highly Customizable: Visual appearance independent of internal representation
- Pluggable look-and-feel: Application look and feel can be changed at runtime based on available values
JApplet
- Represents a Swing applet
- Subclass of the Applet class
- Used for creating applets that use Swing components
- Components are added to the content pane
ImageIcon
- Implements the Icon interface for painting images in Swing
- Constructor:
ImageIcon(String filename),ImageIcon(URL location) - Methods:
getIconHeight(),getIconWidth(),getImage(),paintIcon(),setImage()
JLabel
- Displays text, images, or both
- Constructors:
JLabel(),JLabel(String),JLabel(Icon),JLabel(String, Icon, horizontalAlignment)
JCheckBox
- A graphical control used to create a checkbox
- Changes its state between "on" or "off"
- Inherits the JToggleButton class
JButton
- An implementation of a push button
- Generates an event when pressed
- Can have text or images
JRadioButton
- Used to create radio buttons
- Allows selecting one from multiple options
JComboBox
- Creates dropdown (combo) boxes
- Used to select options from a list
- Constructors:
JComboBox(),JComboBox(Object[] items),JComboBox(Vector<?> items) - Methods:
addItem(),removeItem(),removeAllItems(),setEditable(),addActionListener(),addItemListener()
JScrollPane
- Makes portions of a larger component scrollable
- Constructors:
JScrollPane(),JScrollPane(Component),JScrollPane(Component, int, int) - Constants for scroll bar policies:
VERTICAL_SCROLLBAR_AS_NEEDED,HORIZONTAL SCROLLBAR_ALWAYS, etc
JTree
- Displays hierarchical data in a tree structure
- Inherits
JComponent - Uses
DefaultMutableTreeNodefor creating nodes and representing hierarchical relationships.
JTabbedPane
- Used to switch between components using tabs
- Contains
add()method for adding components to tabs
JTable
- Displays data in a tabular (row/column) format
JProgressBar
- Displays the progress of a task in a progress bar
- Constructors include
JProgressBar()and various constructors based on maximum or minimum values and orientation.
JSeparator
- Creates dividers in a layout
- Constructor:
JSeparator(),JSeparator(int orientation)(for vertical dividers)
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers key concepts related to Java Swing components, including their characteristics and differences from AWT. Participants will learn about the platform-independent nature of Swing, its lightweight components, and the MVC architecture that Swing adheres to. Test your knowledge of these essential elements of window-based application development in Java.
