Here you can find the source of displayErrorMessage(Component component, Throwable t)
public static void displayErrorMessage(Component component, Throwable t)
//package com.java2s; /*//from w w w.ja v a2s .com * ClientUtils.java * * Network Embedded Sensor Testbed (NESTbed) * * Copyright (C) 2006-2007 * Dependable Systems Research Group * School of Computing * Clemson University * Andrew R. Dalton and Jason O. Hallstrom * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the * * Free Software Foundation, Inc. * 51 Franklin Street, Fifth Floor * Boston, MA 02110-1301, USA. */ import java.awt.Component; import java.awt.Dimension; import java.awt.Frame; import java.io.ByteArrayOutputStream; import java.io.PrintWriter; import javax.swing.JDialog; import javax.swing.JOptionPane; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.JTextField; public class Main { public static void displayErrorMessage(Component component, Throwable t) { Frame parent = null; for (Component c = component; c != null && parent == null; c = c.getParent()) { if (c instanceof Frame) { parent = (Frame) c; } } JDialog dialog = createExceptionDialog(parent, t.getClass().getName(), t); dialog.setVisible(true); } private static JDialog createExceptionDialog(Frame parent, String title, Throwable error) { ByteArrayOutputStream messageStream = new ByteArrayOutputStream(); PrintWriter out = new PrintWriter(messageStream); error.printStackTrace(out); out.close(); JTextField errorMsg = new JTextField(error.toString()); JTextArea errorText = new JTextArea(messageStream.toString()); JScrollPane textPane = new JScrollPane(errorText); errorText.setEditable(false); errorMsg.setEditable(false); textPane.setPreferredSize(new Dimension(500, 400)); JOptionPane warning = new JOptionPane(textPane, JOptionPane.ERROR_MESSAGE); JDialog dialog = warning.createDialog(parent, title); dialog.getContentPane().add(warning); dialog.setResizable(true); return dialog; } }