Graphical User Interfaces - Java - page 572

[filename="src/main/java/gui/ThreadBasedCatcher.java", language="java",
identifier="main"]
snippet~~~~
ERROR: Failed to load src/main/java/gui/ThreadBasedCatcher.java
snippet~~~~

Figure 14-7 shows the program running; pushing the button produced this output:

You crashed thread AWT-EventQueue-0
Exception was: java..lang.RuntimeException: You asked for it.

Figure 14-7. ThreadBasedCatcher running

To display the caught exceptions, you may want to show each one in a dialog. My API class
com.darwinsys.swingui.ErrorUtil contains a method:

public static void showExceptions(Component parent, Throwable t)

The online version of ThreadBasedCatcher ( Action Handling Using Anonymous Inner
Classes ) uses showExceptions() , but was omitted from the topic to keep the code clearer.
This method displays the Throwable (and, if applicable, any nested exceptions) in an error
dialog:

/**
* Show the given Exception (and any nested Exceptions) in JOptionPane(s).
*/
public public static static void void showExceptions ( Component parent , Throwable theExc ) {

Throwable next = null null ;

ddo {

String className = theExc . getClass (). getName ();
String message = className ;

iif ( theExc instanceof instanceof SQLException ) {