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Sometimes you might see the show method used instead. From Problem Solving to Java. Set or get the frame's glass pane. In earlier versions such as 1. Create a frame that is initially invisible. JMenuItem jMenuItem4. FileFilter. For the integer version of setBoundsthe window's upper Chm jfc swing corner is at the x, y location specified by the first two arguments, and has the width and height specified by the last two arguments.
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Parkerville JFC. Forrestfield JFC. Subscribe to jfc-swing. Problem You want to implement a xwing mouse rollover effect on the buttons JButton instances in your Java Swing application. Microsoft and. Chm jfc swing Site. Chidlow JFC. I'm often asked, "How do I center a JFrame on screen? Last updated: March 10 Publisher: Jabbe Tech.
JFC is short for Java Foundation Classes, which encompass a group of features for building graphical user interfaces GUIs and adding rich graphics functionality and interactivity to Java applications.
- This task-oriented, example-driven tutorial allows you to create user interfaces that work without change on multiple platforms, appearing and performing as well as or better than native interfaces.
- Media shouldnt be confined to a single medium and the space within that medium.
- A lot of people complain about a lot of things in regards to Java on Apple 's Mac OS X platform, and okay, occasionally I'm one of them, but a very cool thing you can do on OS X is to create translucent transparent frames and windows with Java.
JFC is short for Java Foundation Classes, which encompass a group of features for building graphical user interfaces GUIs and adding rich graphics functionality and interactivity to Java applications. It is defined as containing the features shown in the table below. This trail concentrates on the Swing components. We help you choose the appropriate components for your GUI, tell you how to use them, and give you the background information you need to use them effectively.
We also discuss other features as they apply to Swing components. This trail sorts out the API for you, giving you examples of common code and pointing you to methods and classes you're likely to need. All rights reserved. Hide TOC. Getting Started with Swing. Many components are capable of sorting, printing, and drag and drop, to name a few of the supported features.
Pluggable Look-and-Feel Support The look and feel of Swing applications is pluggable, allowing a choice of look and feel. For example, the same program can use either the Java or the Windows look and feel.
Accessibility API Enables assistive technologies, such as screen readers and Braille displays, to get information from the user interface. Java 2D API Enables developers to easily incorporate high-quality 2D graphics, text, and images in applications and applets. Java 2D includes extensive APIs for generating and sending high-quality output to printing devices. Internationalization Allows developers to build applications that can interact with users worldwide in their own languages and cultural conventions.
With the input method framework developers can build applications that accept text in languages that use thousands of different characters, such as Japanese, Chinese, or Korean. The Swing API is powerful, flexible — and immense. The Swing API has 18 public packages: javax. Includes everything from buttons to split panes to tables.
The look and feel of Swing applications is pluggable, allowing a choice of look and feel. Enables assistive technologies, such as screen readers and Braille displays, to get information from the user interface. Enables developers to easily incorporate high-quality 2D graphics, text, and images in applications and applets. Allows developers to build applications that can interact with users worldwide in their own languages and cultural conventions.
Free Only. Mazenod JFC. With this code, when the user selects one JButton in the group of buttons, the other JButton's will be de-selected. I'm often asked, "How do I center a JFrame on screen? Forrestfield JFC. Here's a very simple Java JButton example that shows how to create and use a button group in Java using the ButtonGroup class.
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Recent Books. IT Research Library. Miscellaneous Books. Computer Languages. Computer Science. Electronic Engineering. Linux and Unix. Microsoft and. Mobile Computing. Networking and Communications. Sort by. Back Close. Free Only. Editor Rating. User Rating. Apply Filters. Publisher: licaiedu. Chidlow JFC. Publisher: Jabbe Tech Downloads: 2.
This section examines the code for a simple program, HelloWorldSwing. Here's a snapshot of the HelloWorldSwing program:. And here's the full code for HelloWorldSwing: import javax. This is one of the simplest Swing applications you can write. Set up a top-level container. Display the container. Be thread-safe. The first line imports the main Swing package: import javax. This is the only package that HelloWorldSwing needs. The event model governs how a component reacts to events such as button clicks and mouse motion.
A top-level Swing container provides the support Swing components need for painting and event handling. Each JFrame object implements a single main window, and each JDialog implements a secondary window a window dependent on another window.
JApplet is covered in How to Make Applets. Applications with a GUI typically use at least one frame. However, it works only as of v1. With the exception of top-level containers, such as JFrame, all Swing components descend from the JComponent class. Every top-level container has a content pane that contains, directly or indirectly, all the visible components except for menus and window decorations in the top-level container. It still works, but unnecessarily adds a class, which bloats your program.
You can find further information on window events in How to Make Frames Main Windows The final bit of code in HelloWorldSwing?
You can copy this code and use it as-is. To make a window that's dependent on another window — disappearing when the other window is iconified, for example — use a dialog instead of a frame. To make a window that appears within another window, use an internal frame. Here's a picture of the extremely plain window created by an example called FrameDemo.
You can find the source code in FrameDemo. Calling setDefaultLookAndFeelDecorated true requests that any subsequently created frames have window decorations provided by the look and feel, and not by the window system. For details, see Specifying Window Decorations. For frames that have menus, you'd typically add the menu bar to the frame here using the setJMenuBar method. See How to Use Menus for details. This example doesn't set the frame's location, but it's easy to do so using either the setLocationRelativeTo or setLocation method.
For example, the following code centers a frame onscreen: frame. Besides specifying who provides the window decorations, you can also specify which icon is used the represent the window.
Exactly how this icon is used depends on the window system or look and feel that provides the window decorations. If the window system supports minimization, then the icon is used to represent the minimized window.
A typical icon size is 16x16 pixels, but some window systems use other sizes. The following snapshots show three frames that are identical except for their window decorations.
As you can tell by the appearance of the button in each frame, all three use the Java look and feel. However, only the first and third frames use window decorations provided by the Java look and feel. The second uses decorations provided by the window system, which happens to be Microsoft Windows but could as easily be any other system running the 1. The third frame uses Java look and feel window decorations, but has a custom icon. You can switch back to using window system decorations by invoking JFrame.
Some look and feels might not support window decorations; in this case, the window system decorations are used. Previously, the decorations on a frame were always provided by the window system.
The full source code for the application that creates the frames pictured above is in FrameDemo2. Besides showing how to choose window decorations, FrameDemo2 also shows how to disable all window decorations and gives an example of positioning windows.
It includes two methods that create the Image objects used as icons — one is loaded from a file, and the other is painted from scratch. Or, to compile and run the example yourself, consult the example index. Bring up two windows, both with look-and-feel-provided decorations, but with different icons.
The Java look and feel displays the icons in its window decorations. Depending on your window system, the icon may be used elsewhere to represent the window, especially when the window is minimized. See if your window system treats these icons differently. Play with the various types of windows to see how the window decorations, window system, and frame icons interact. Responding to Window-Closing Events. Instead, the program should probably use a window listener that performs some other action in its windowClosing method.
This removes the window from the screen but leaves it displayable. This removes the window from the screen and frees up any resources used by it. If used within an applet, a SecurityException may be thrown. Introduced in 1. In earlier versions such as 1. The default close operation is executed after the any window listeners handle the window-closing event. So, for example, assume that you specify that the default close operation is to dispose of a frame.
You also implement a window listener that tests whether the frame is the last one visible and, if so, saves some data and exits the application. Under these conditions, when the user closes a frame, the window listener will be called first.
If it doesn't exit the application, then the default close operation — disposing of the frame — will then be performed. Besides handling window-closing events, window listeners can also react to other window state changes, such as iconification and activation. Because each JFrame object has a root pane, frames have support for interposing input and painting behavior in front of the frame's children, placing children on different "layers", and for Swing menu bars.
The String argument provides a title for the frame. To make the frame visible, invoke setVisible true on it. Note that the argument is a java. Image object, not a javax. ImageIcon or any other javax. Icon implementation. Works only if the frame is not yet displayable hasn't been packed or shown. Typically used with full-screen exclusive mode or to enable custom window decorations. Note that this is only a hint, as some look and feels may not support this feature. Setting the Window Size and Location Method Purpose void pack in Window Size the window so that all its contents are at or above their preferred sizes.
The integer arguments to setSize specify the width and height, respectively. For the integer version of setBounds , the window's upper left corner is at the x, y location specified by the first two arguments, and has the width and height specified by the last two arguments.
The parameters are the x and y values, respectively. If the argument is null , the window is centered onscreen. To properly center the window, you should invoke this method after the window's size has been set. The content pane contains the frame's visible GUI components and should be opaque.
The root pane manages the interior of the frame including the content pane, the glass pane, and so on. You can use the glass pane to intercept mouse events or paint on top of your program's GUI.
You can use the frame's layered pane to put components on top of or behind other components. Framework — A study in creating and destroying windows, in implementing a menu bar, and in exiting an application. Copyright Sun Microsystems, Inc.
All rights reserved. Although unofficial, it's frequently used to refer to the new components and related API. The Swing API is powerful, flexible--and immense. In release 1. Here is the code that sets up and shows the frame: JFrame.
You can find further information on window events in How to Make Frames Main Windows The final bit of code in HelloWorldSwing? Applets sometimes use frames, as well. Creating and Showing Frames Here's a picture of the extremely plain window created by an example called FrameDemo. The following code, taken from FrameDemo, is a typical example of the code used to create and set up a frame. Optional: Specify who draws the window decorations.
Create the frame. Optional: What happens when the frame closes?