Java JTextComponent safeGetText(JTextComponent textComponent)

Description

Gets the "text" contents of a JTextComponent without the possibility of a NullPointerException .

License

Open Source License

Parameter

Parameter	Description
textComponent	JTextComponent whose contents should be extracted. null is allowed.

Return

Either the results of or an empty String if textComponent or getText() are null .

Declaration

public static String safeGetText(JTextComponent textComponent) 

Method Source Code

//package com.java2s;
/*/* www  .  j av a  2  s.  c  om*/
 * This file is part of McIDAS-V
 *
 * Copyright 2007-2014
 * Space Science and Engineering Center (SSEC)
 * University of Wisconsin - Madison
 * 1225 W. Dayton Street, Madison, WI 53706, USA
 * http://www.ssec.wisc.edu/mcidas
 * 
 * All Rights Reserved
 * 
 * McIDAS-V is built on Unidata's IDV and SSEC's VisAD libraries, and
 * some McIDAS-V source code is based on IDV and VisAD source code.  
 * 
 * McIDAS-V is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 * 
 * McIDAS-V 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 Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser Public License
 * along with this program.  If not, see http://www.gnu.org/licenses.
 */

import javax.swing.text.JTextComponent;

public class Main {
    /**
     * Gets the {@literal "text"} contents of a {@link JTextComponent} without
     * the possibility of a {@code NullPointerException}.
     *
     * @param textComponent {@code JTextComponent} whose contents should be
     * extracted. {@code null} is allowed.
     *
     * @return Either the results of {@link JTextComponent#getText()} or an
     * empty {@code String} if {@code textComponent} or {@code getText()} are
     * {@code null}.
     */
    public static String safeGetText(JTextComponent textComponent) {
        String value = "";
        if ((textComponent != null) && (textComponent.getText() != null)) {
            value = textComponent.getText();
        }
        return value;
    }
}

Related

1. refreshJTextComponent(JTextComponent textComponent)
2. registerEvents(final JTextComponent textCmp, final String hintText)
3. registerUpperCase(final JTextComponent textComp)
4. removeAllHighlightsUsingPainter(final JTextComponent textComponent, final Highlighter.HighlightPainter painter)
5. removeDocumentListeners(JTextComponent component)
6. scrollToText(JTextComponent textComponent, int startingIndex, int endingIndex)
7. scrollToTop(JTextComponent edit1)
8. setError(JTextComponent component, boolean error)
9. setErrorBackground(JTextComponent comp)