Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you about the basis of Java GUI user interface programming. The article is rich in content and analyzed and described from a professional point of view. I hope you can get something after reading this article.

Java's GUI programming (Graphic User Interface, graphical user interface) is implemented on its abstract window toolbox (Abstract Window Toolkit,AWT). Java.awt is the tool class library of AWT, which includes rich support for graphics, user interface components and layout managers.

GUI is mainly used in two places:

◆ Application

◆ Applet .

1) GUI interface:

In Java GUI, a control panel that interacts between a user and a program that contains menus, controls (or components), containers, and responds to user events.

Now there are all kinds of window systems, and different window systems provide different libraries for programming, for example, SDK based on Windows and Xlib of X Windows based on Unix platform.

In order to make programs run under different window systems, Java puts forward the concept of "abstract window system" and provides AWT (Abstract window Toolkit), which enables Java to run under different window systems.

2) GUI implementation in Java:

The use of AWT (Abstract window tool set) makes Java GUI suitable for different OS environments and creates a multi-system user interface.

The features are as follows:

The specific implementation of ① is explained by the OS under the target platform, which leads to different running effects of Java GUI on different platforms (window appearance, font, etc., display effect will change).

② components should not use absolute positioning in design, but should use layout manager to achieve relative positioning, so that it is independent of platform and equipment.

3) New Java Swing GUI components

AWT components and event response are not as rich as Microsoft's SDK (because some OS platforms do not have Microsoft's Windows components), Sun has added Swing GUI components to Java2. However, AWT is relatively simple, and its functions can also meet the needs of most user interfaces, especially in the design of Java Applet. At the same time, this discussion also lays a solid foundation for our further study of Swing GUI components.

The above is the basis of the Java GUI user interface programming shared by the editor. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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