try {
Class.forName("javax.swing.JButton");
} catch (ClassNotFoundException e) {
String failure =
"Sorry, but this version of MyApp needs \n" +
"a Java Runtime with JFC/Swing components\n" +
"having the final names (javax.swing.*)";
System.err.println(failure);
// Make something appear in the GUI. Either a JOptionPane, or:
// myPanel.add(new Label(failure));
throw new IllegalArgumentException(failure);
}
// No need to print anything here - the GUI should work...
