Here you can find the source of showError(Component parent, String message)
public static final void showError(Component parent, String message)
//package com.java2s; /*//from w ww .j av a2 s .c o m * "ChemLab", Desktop helper application for chemists. * Copyright (C) 1996-1998, 2015 by Serg V. Zhdanovskih (aka Alchemist, aka Norseman). * * 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 3 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, see <http://www.gnu.org/licenses/>. */ import java.awt.Component; import javax.swing.JOptionPane; public class Main { public static final void showError(Component parent, String message) { JOptionPane.showMessageDialog(parent, message, "ChemLab", JOptionPane.ERROR_MESSAGE); } }