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Day 8: Working with Swing
Notes and Corrections
Source Files
Reader Questions
- Question: The combo box example on page 219 does not allow the
entry of text. How do I get it to accept text entry?
Answer: The Expiration application uses a drop-down list instead of a
combo box. To change a JComboBox component so that it can receive text
input, call the component's setEditable(boolean) method with an
argument of true before you add the component to a container.
- 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
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