[英]What is the name of the design pattern used in AWT/Swing that handles events?
I have heard that there are 2 ways that we can set the PLAF in Swing. 我听说有两种方法可以在Swing中设置PLAF。 What is the real meaning of PLAF, and what are those 2 ways? PLAF的真正含义是什么,这两种方式是什么?
Some of the most notable implementations of this pattern: 此模式的一些最著名的实现:
- The Java Swing library makes extensive use of the observer pattern for event management. 在Java Swing库中大量使用了事件管理的观察者模式。
To answer the question in your title: Observer is the design pattern that Swing employs. 回答标题中的问题: 观察者是Swing所采用的设计模式。
PLAF is a ' P luggable L ook A nd F eel'. PLAF是一个“P luggable 大号 OOK 甲 ND˚F鳗鱼”。 Here is a reference for PLAF in Java. 这是 Java中PLAF 的参考 。
The title, regarding the Event Listeners, and the PLAF are not related. 与事件侦听器有关的标题与PLAF无关。 The former has to do with the processing of events - more closely associated with the C in MVC, while the latter is generally associated with the V iew aspect of MVC. 前者与事件的处理做的事情-在MVC中的C.更密切相关,而后者通常与MVC中的V IEW方面相关。
PLAF = Pluggable Look and Feel. PLAF =可插拔外观。 Basically, the same UI can have different skins with very little work. 基本上,同一UI只需很少的工作就可以具有不同的外观。
Check out this site for a detailed description of L&F. 请访问此站点以获取L&F的详细说明。 In short, there are actually 3 ways to set up your PLAF. 简而言之,实际上有3种方法来设置您的PLAF。
1) Via command line: java -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel MyApp or java -Dswing.defaultlaf=com.sun.java.swing.plaf.windows.WindowsLookAndFeel MyApp 1)通过命令行:java -Dswing.defaultlaf = com.sun.java.swing.plaf.gtk.GTKLookAndFeel MyApp或java -Dswing.defaultlaf = com.sun.java.swing.plaf.windows.WindowsLookAndFeel MyApp
2) Via swing.properties file in your java lib. 2)通过Java库中的swing.properties文件。 swing.defaultlaf=com.sun.java.swing.plaf.windows.WindowsLookAndFeel swing.defaultlaf = com.sun.java.swing.plaf.windows.WindowsLookAndFeel
3) Programatically with either: 3)以下列方式编程:
//At the beginning of your program
UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
//Another option
UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFeel");
//And another
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
//Or during your program -
UIManager.setLookAndFeel(lnfName);
SwingUtilities.updateComponentTreeUI(frame);
frame.pack();
The above link also has code examples to demonstrate how to change your look and feel. 上面的链接还提供了代码示例,以演示如何更改外观。
Hope that helps! 希望有帮助!
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