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The JavaSpecialists' Newsletter
Celebrating 23 years of publication, enjoyed in over 155 countries by 70,000 of the world's top Java programmers and spanning over 300 specialist Java articles.
Newsletter Archive (GUI)
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182 Remote Screenshots 2010-05-12
In this newsletter, we describe how we can generate remote screen shots as compressed, scaled JPGs to build a more efficient remote control mechanism. Full Article
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148 Snappy JSliders in Swing 2007-07-31
Recent versions of Swing do a good job of mimicking the underlying platform, with a few caveats. For example, the JSlider only snaps onto the correct tick once you let go of the mouse. Here I present a fix for this problem with a non-intrusive one-liner that we can add to the application code. Full Article
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145 TristateCheckBox Revisited 2007-05-25
The Tristate Checkbox is widely used to represent an undetermined state of a check box. In this newsletter, we present a new version of this popular control, retrofitted to Java 5 and 6. Full Article
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143 Maths Tutor in GWT 2007-04-08
Google Web Toolkit (GWT) allows ordinary Java Programmers to produce highly responsive web user interfaces, without needing to become experts in JavaScript. Here we demonstrate a little maths game for practicing your arithmetic. Included is an Easter egg. Full Article
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106 Multi-Line Cells in JTable in JDK 1.4+ 2005-04-14
Our earlier solution to multi-line cells in JTable did not work in Java 1.4. We show a new version that does. Full Article
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104 EDT Lockup Detection 2005-02-13
Swing is famous for its "refresh bug", where the application stops refreshing the screen. This happens when the Event Dispatch Thread (EDT) is blocked, either temporarily by a long operation or permanently because of a deadlock. In the newsletter we look at a technique for sounding the alarm. Full Article
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101b Causing Deadlocks in Swing Code (Follow-Up) 2005-01-19
A follow-up to explain that the previous code was not the "refresh bug", but rather an issue with the static initializer starting a thread and that thread calling a static method. Full Article
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101 Causing Deadlocks in Swing Code 2005-01-18
Swing uses several locks. When several threads work with the GUI at the same time, it is not always easy to determine the order of the locks. This can result in deadlocks, the famous "refresh bug". Full Article
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099 Orientating Components Right to Left 2004-11-23
In Swing, we can make GUIs be oriented either from left to right, as most countries do, or from right to left, as you would find in Arabic and Hebrew. Full Article
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091 Controlling Machines Remotely with Java 2004-07-08
We use the java.awt.Robot to control machines remotely with Java, typing keys, moving the mouse and sending back screenshots. This can help instructors assist remote students. Full Article
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082 TristateCheckBox Based on the Swing JCheckBox 2003-12-02
The ordinary Swing JCheckBox has only two states. We present a new component that is based on the old JCheckBox, but which has three states. Full Article
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075 An Automatic Wait Cursor: WaitCursorEventQueue 2003-07-29
Instead of programmatically setting the wait cursor, we can also let the java.awt.EventQueue do the heavy lifting for us. Nathan Arthur explains how. Full Article
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074 GoF Factory Method in Writing GUIs 2003-07-14
Instead of using Rapid Application Development (RAD) tools for building GUIs, we can use GoF factory methods to create our user interfaces with code. Full Article
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065 Wait, Cursor, Wait! 2003-03-06
Coding Swing can be tricky. There are a lot of strange edge cases. One of the harder things to get right are the wait cursors, specifically in conjunction with modal dialogs. We will learn how to set the wait cursor on the parent window/frame of a modal dialog. Full Article
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045 Multi-Line Cells in the JTable 2002-04-11
In this newsletter we have a look at how we can render a JTextArea in a JTable cell. Full Article
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041 Placing Components on Each Other 2002-02-15
Swing uses the Composite design pattern for components. This means that we can place components on each other, creating new types of widgets. An example would be a JButton that also contains a JCheckBox. Full Article
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030 What Do You Prefer? 2001-09-17
We learn how to build a simple, yet usable, cross-platform registry editor using standard Java. Full Article
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019 Finding Lost Frames 2001-05-10
We keep a list of created Frame instances handy, so that we can find them again when we create Dialogs. This prevents ownerless modal Dialogs from causing issues. Full Article
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013b Serializing GUI Components Across Network (Foll... 2001-03-15
The previous newsletter had a dependency that stopped us serializing the components. The code worked when compiled with JBuilder 2, but not when compiled with the JDK 1.3. Full Article
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013a Serializing GUI Components Across Network 2001-03-14
Thousands of classes implement the Serializable interface, meaning we can write them over an ObjectOutputStream. Amongst these is java.awt.Component, the superclass of all GUI classes in AWT and Swing. We can thus serialize JTable, JLabel, even JFrame. Full Article
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012 Setting Focus to Second Component of Modal Dialog 2001-03-07
In Swing, we sometimes need to set the focus to the second component. This newsletter describes how to do it. Full Article
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010 Writing Own GUI Layout Manager 2001-02-22
Layout managers in AWT/Swing can be frustrating to use. After trying various combinations, my colleague gave up and asked me for help. Instead of battling with GridBagLayout, we wrote our own LayoutManager. It was surprisingly simple and very effective. Full Article
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007 java.awt.EventQueue 2001-02-01
In this newsletter, we learn how we can create our own EventQueue and then use that to intercept all the events that arrive in AWT/Swing. Full Article
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About the Author
Java Champion, author of the Javaspecialists Newsletter, conference speaking regular... About Heinz
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