Day 8: Working with Swing

Notes and Corrections

• Page 211: In the example that demonstrates how label components are used, the chance label is not set up correctly. A new example program, Labels.java, creates three labels using the following statements:
  • JLabel tinker = new JLabel("Tinker", SwingConstants.LEFT);
  • JLabel evers = new JLabel("Evers", SwingConstants.CENTER);
  • JLabel chance = new JLabel("Chance", SwingConstants.RIGHT);

Source Files

• ButtonApplet.java
• ButtonApplet.class
• ButtonApplet.html
• Buttons.java
• Buttons.class
• ChooseTeam.java
• ChooseTeam.class
• ExitFrame.java
• ExitFrame.class
• ExitWindow.java
• ExitWindow.class
• Expiration.java
• Expiration.class
• Form.java
• Form.class
• Icons.java
• Icons.class
• 3dman.gif
• Labels.java
• Labels.class
• SimpleFrame.java
• SimpleFrame.class
• SimpleWindow.java
• SimpleWindow.class

Reader Questions

• Question: The SimpleFrame application compiles successfully, but when I try to run it (or any other Swing application), I get this error: "java.lang.UnsatisfiedLinkError: no fontmanager in java.library.path." What's the problem?
  Answer: I can't reproduce this error myself, but after looking through Sun's Java bug database and support forums, it appears to be a problem with font support on your computer.
       On a Windows system, the Java font manager is in a file called fontmanager.dll. To see all the folders in your library path, call System.getProperty("java.library.path") in a Java application and display the string that it returns. (I've written a short application that does this: download SeeLibraryPath.java and SeeLibraryPath.class) Check to see if fontmanager.dll is in one of the folders in the library path. If it isn't, you need to remove and reinstall the Java 2 SDK and the Java 2 runtime.
       If fontmanager.dll is in the right place, you might want to check this JBuilder tech support tip for a fontmanager problem. It advises that you should remove each shortcut from your \Windows\Fonts or \Winnt\Fonts folder and replace it with the actual font the shortcut refers to.

Activities

• Solution #1: VCR.java and VCR.class.
• Solution #2: AskPassword.java and AskPassword.class.