show the stacktrace

gistfile1.java

/*-
 * usage
 * try {
 *     ...
 * }
 * catch ( Exception ex ) {
 *     showException( null, true, ex );
 * }
 */

public static void showException( Frame parent, boolean modal, Throwable ex ) {
	final JDialog dialog = new JDialog( parent, modal );
	JScrollPane scrollPane = new JScrollPane();
	dialog.getContentPane().add( scrollPane, BorderLayout.CENTER );
	dialog.setTitle( "StackTrace" );
	JButton button = new JButton( "OK" );
	button.addActionListener( new ActionListener() {
		@Override
		public void actionPerformed(ActionEvent e) {
			dialog.dispose();
		}
	});
	dialog.getContentPane().add( button, BorderLayout.SOUTH );
	
	DefaultMutableTreeNode root = new DefaultMutableTreeNode( "StackTrace" );
	while ( ex != null ) {
		DefaultMutableTreeNode node = new DefaultMutableTreeNode( ex.getClass().getName() + ":" + ex.getMessage() );
		for ( StackTraceElement elm : ex.getStackTrace() ) {
			DefaultMutableTreeNode child = new DefaultMutableTreeNode( elm.toString() );
			node.add( child );
		}
		root.add( node );
		ex = ex.getCause();
	}
	
	JTree tree = new JTree( root );
	JViewport viewPort = scrollPane.getViewport();
	viewPort.setView( tree );
	
	dialog.pack();
	showCenter( dialog );
}


public static void showCenter( java.awt.Window window ) {
	Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
	
	int x = (int) ((d.getWidth() - window.getWidth()) / 2);
	int y = (int) ((d.getHeight() - window.getHeight()) / 2);
	window.setLocation( x, y );
	
	window.setVisible( true );
}