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Lecture 29

Lecture 29. Swing & the JFC – Advanced Java GUI. Java Foundation Classes (JFC). JFC consists of five API AWT Java 2D Java Accessibility Java Drag & Drop Swing. Versions. Java 1.0 - AWT 1.0, but no Swing (NB AWT 1.0 incompatible with Swing)

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Lecture 29

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  1. Lecture 29 Swing & the JFC – Advanced Java GUI

  2. Java Foundation Classes (JFC) • JFC consists of five API • AWT • Java 2D • Java Accessibility • Java Drag & Drop • Swing

  3. Versions • Java 1.0 - AWT 1.0, but no Swing (NB AWT 1.0 incompatible with Swing) • Java 1.1 - AWT 1.1, Swing as an add-on • Java 2 - Swing is core • Java 1.2 / 1.3 / 1.4 / 1.5 • Be particularly careful with applets – Swing will only work if a Java2 VM is present in the browser

  4. What is Swing? • Swing is a component library • Based upon AWT 1.1 widgets and event model • AWT extended by JComponents and supporting classes • Analagous classes to AWT (mostly extended) • New classes

  5. Swing vs AWT • Much larger than AWT • No native code • Most components (eg buttons, labels, lists etc) can display images as well as text • Text formatting allowed (HTML) • Better border control • Components do not have to be rectangular

  6. Limitations of Swing • Large API • Be careful with mixing Swing with “heavyweight” non-Swing components. • Swing components are not “thread safe” • Swing components must be in a Swing container

  7. javax.swing javax.swing.border javax.swing.colorchooser javax.swing.event javax.swing.filechooser javax.swing.plaf javax.swing.table javax.swing.text javax.swing.text.html javax.swing.text.rtf javax.swing.tree javax.swing.undo javax.accessibility Swing Packages

  8. Content Panes • Swing containers are much more complex than AWT • All containers have “panes”, to which components are added • These are loosly similar to AWT panels, but have many other properties

  9. Plugable User Interfaces • plaf - Plugable Look & Feel • Cross-platform look & feel (Metal) • Motif • OS Specific (eg Windows, Macintosh etc) • Customised look & feel

  10. Converting AWT to Swing • Import main Swing package (import javax.swing) • Check threading issues(only modify components with their own methods) • Replace all AWT components with Swing equivalents • Modify methods as necessary • Change calls to add() and setLayout() methods to use panes of containers

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