001////////////////////////////////////////////////////////////////////////////////
002// checkstyle: Checks Java source code for adherence to a set of rules.
003// Copyright (C) 2001-2022 the original author or authors.
004//
005// This library is free software; you can redistribute it and/or
006// modify it under the terms of the GNU Lesser General Public
007// License as published by the Free Software Foundation; either
008// version 2.1 of the License, or (at your option) any later version.
009//
010// This library is distributed in the hope that it will be useful,
011// but WITHOUT ANY WARRANTY; without even the implied warranty of
012// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013// Lesser General Public License for more details.
014//
015// You should have received a copy of the GNU Lesser General Public
016// License along with this library; if not, write to the Free Software
017// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
018////////////////////////////////////////////////////////////////////////////////
019
020package com.puppycrawl.tools.checkstyle.gui;
021
022import java.io.File;
023
024import javax.swing.SwingUtilities;
025import javax.swing.WindowConstants;
026
027/**
028 * Entry point for starting the checkstyle GUI.
029 *
030 */
031public final class Main {
032
033    /** Hidden constructor of the current utility class. */
034    private Main() {
035        // no code
036    }
037
038    /**
039     * Entry point.
040     *
041     * @param args the command line arguments.
042     */
043    public static void main(final String... args) {
044        SwingUtilities.invokeLater(() -> {
045            createMainFrame(args);
046        });
047    }
048
049    /**
050     * Helper method to create the {@code MainFrame} instance.
051     *
052     * @param args the command line arguments
053     */
054    private static void createMainFrame(String... args) {
055        final MainFrame mainFrame = new MainFrame();
056        if (args.length > 0) {
057            final File sourceFile = new File(args[0]);
058            mainFrame.openFile(sourceFile);
059        }
060        mainFrame.setTitle("Checkstyle GUI");
061        mainFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
062        mainFrame.pack();
063        mainFrame.setVisible(true);
064    }
065
066}