Java- GUI- Mazenet solution
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The document provides an overview of creating graphical user interfaces (GUIs) in Java, focusing on applet programming, the Abstract Window Toolkit (AWT), and Swing. It highlights the advantages of applets, the lifecycle of applets, and details how to utilize both AWT and Swing components for developing applications. Additionally, it compares AWT and Swing, explaining their properties and differences in handling layout and events.
![Using a GUI Component
1. Create it
• Instantiate object: b = new JButton(“press me”);
2. Configure it
• Properties: b.text = “press me”; [avoided in
java]
• Methods: b.setText(“press me”);
3. Add it
• panel.add(b);
4. Listen to it
• Events: Listeners
JButton](https://image.slidesharecdn.com/gui-160531061444/85/Java-GUI-Mazenet-solution-26-320.jpg)
![Application Code
import javax.swing.*;
class hello {
public static void main(String[] args){
JFrame f = new JFrame(“title”);
JPanel p = new JPanel();
JButton b = new JButton(“press me”);
p.add(b); // add button to panel
f.setContentPane(p); // add panel to frame
f.show();
}
}
press me](https://image.slidesharecdn.com/gui-160531061444/85/Java-GUI-Mazenet-solution-28-320.jpg)
Java- GUI- Mazenet solution
- 1. GUI in Java By Sharmilee 9894303344 Java Trainer Mazenet Solution
- 2. Objectives • GUI Introduction • Applet Programming • Applet Lifecycle • AWT • SWING • Layouts • Event Handling
- 6. Introduction • Applet is a special type of program that is embedded in the webpage to generate the dynamic content. • It runs inside the browser and works at client side.
- 7. Advantage • It works at client side so less response time. • Secured • It can be executed by browsers running under many platforms, including Linux, Windows, Mac Os etc.
- 10. Lifecycle methods • java.applet.Applet public void init() public void start() public void stop() public void destroy() • java.awt.Component public void paint()
- 11. Java AWT
- 12. Abstract Window Toolkit (AWT) • It is platform-dependent windowing, graphics, and user-interface widget toolkit preceding Swing. • AWT is part of the Java Foundation Classes (JFC) • the standard API for providing a graphical user interface (GUI) for a Java program.
- 14. AWT Hierarchy
- 15. Creating an awt • To create awt example, we have two methods – By extending frame class(Inheritance) – By creating the object of frame class (association)
- 16. Container • It is a component in AWT • It contain another components like buttons, textfields, labels etc. • The classes that extends Container class are known as container such as Frame, Dialog and Panel.
- 18. Panel • The Panel is the container that doesn't contain title bar and menu bars. • It can have other components like button, textfield etc.
- 20. Frame • Frame is the container that contain title bar and can have menu bars. • It can have other components like button, textfield etc.
- 22. AWT to Swing • AWT: Abstract Windowing Toolkit • import java.awt.* • Swing: • import javax.swing.*
- 23. Swing
- 24. Introduction to Swing • It is used to create window-based applications. • It is built on the top of AWT API and entirely written in java. • Swing provides platform-independent and lightweight components.
- 25. Swing classes
- 26. Using a GUI Component 1. Create it • Instantiate object: b = new JButton(“press me”); 2. Configure it • Properties: b.text = “press me”; [avoided in java] • Methods: b.setText(“press me”); 3. Add it • panel.add(b); 4. Listen to it • Events: Listeners JButton
- 27. Code JFrame f = new JFrame(“title”); JPanel p = new JPanel( ); JButton b = new JButton(“press me”); p.add(b); // add button to panel f.setContentPane(p); // add panel to frame f.show(); press me
- 28. Application Code import javax.swing.*; class hello { public static void main(String[] args){ JFrame f = new JFrame(“title”); JPanel p = new JPanel(); JButton b = new JButton(“press me”); p.add(b); // add button to panel f.setContentPane(p); // add panel to frame f.show(); } } press me
- 29. Difference between AWT & Swing Sno AWT SWING 1 Platform dependent Platform Independent 2 Heavyweight components Light weight components 3 Doesn’t support pluggable look and feel Supports pluggable look and feel 4 Less components than swing More powerful components 5 Doesn’t follow MVC Follows MVC
- 30. Layout
- 31. Layout Manager Left to right, Top to bottom c n s ew FlowLayout GridLayout BorderLayout none, programmer sets x,y,w,h null One at a time CardLayout GridBagLayout JButton
- 32. Event Handling
- 33. • Changing the state of an object is known as an event. • For example, – click on button, – dragging mouse etc. • The java.awt.event package provides many event classes and Listener interfaces for event handling.
- 34. Steps to perform Event Handling 1. Implement the Listener interface and overrides its methods 2. Register the component with the Listener
- 35. Thank You!!!