Displays an error message in a dialog box. - Java Swing

Java examples for Swing:JDialog

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Description

Displays an error message in a dialog box.

Demo Code

/*/*  w w  w .  j  av a 2 s .  c om*/
 * Copyright 2007 the project originators.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import java.applet.AudioClip;
import java.awt.Component;
import java.util.StringTokenizer;
import javax.swing.BorderFactory;
import javax.swing.JDialog;
import javax.swing.JOptionPane;
import javax.swing.border.Border;

public class Main{
    /**
     * Displays an error message in a dialog box.
     */
    public static void showErrorMessage(final String errMsg) {
        showErrorMessage(null, errMsg, null);
    }
    /**
     * Displays an error message in a dialog box with a title.
     */
    public static void showErrorMessage(final String errMsg,
            final String title) {
        showErrorMessage(null, errMsg, title);
    }
    /**
     * Displays an error message in a dialog box.
     */
    public static void showErrorMessage(final Component dialogParent,
            final String errMsg) {
        showErrorMessage(dialogParent, errMsg, null);
    }
    /**
     * Displays an error message in a dialog box with a title.
     */
    public static void showErrorMessage(final Component dialogParent,
            String errMsg, String title) {
        if (title == null)
            title = "Error";

        char[] newStr = errMsg.toCharArray();
        int charCount = 0;

        //Remove linebreaks from the error message
        for (int i = 0; i < newStr.length; i++) {
            if (newStr[i] == '\r' || newStr[i] == '\n' || newStr[i] == '\t'
                    || newStr[i] == '\f') {
                // Skip all following linebreaks...
                for (; ((i + 1) < newStr.length)
                        && (newStr[i + 1] == '\r' || newStr[i + 1] == '\n'
                                || newStr[i + 1] == '\t' || newStr[i + 1] == '\f'); i++)
                    ;

                // Replace with space, but only if not first character
                if ((charCount > 0)) {
                    newStr[charCount] = ' ';
                    charCount++;
                }
            } else {
                newStr[charCount] = newStr[i];
                charCount++;
            }
        }
        errMsg = new String(newStr, 0, charCount);

        StringTokenizer t = new StringTokenizer(errMsg);
        String result = "";
        String nextToken;
        int lineLength = 0;

        for (int i = 0; t.hasMoreTokens(); i++) {
            nextToken = t.nextToken();
            lineLength += nextToken.length();

            if ((i == 12) || (lineLength > 80)) {
                result += "\n";
                i = 0;
                lineLength = 0;
            }
            result += nextToken + " ";
        }

        JOptionPane pane = new JOptionPane(result,
                JOptionPane.ERROR_MESSAGE);
        pane.setIcon(ResourceHandler.getImageIcon("/images/tiger.gif"));

        JDialog dialog = pane.createDialog(dialogParent, title);
        dialog.pack();

        AudioClip sound = ResourceHandler
                .getAudioClip("/sounds/warning.wav");
        if (sound != null)
            sound.play();

        dialog.setVisible(true);
    }
}

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