Java FontMetrics getMonospacedFontNames()

Description

get Monospaced Font Names

License

Mozilla Public License

Declaration

public static List<String> getMonospacedFontNames()

Method Source Code

//package com.java2s;
/**/*ww w .  ja  v  a 2  s  .  c om*/
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (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.mozilla.org/MPL/
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
 * specific language governing rights and limitations under the License.
 *
 * The Original Code is ""  Description:
 * ""
 *
 * The Initial Developer of the Original Code is University Health Network. Copyright (C)
 * 2001.  All Rights Reserved.
 *
 * Contributor(s): ______________________________________.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * GNU General Public License (the  "GPL"), in which case the provisions of the GPL are
 * applicable instead of those above.  If you wish to allow use of your version of this
 * file only under the terms of the GPL and not to allow others to use your version
 * of this file under the MPL, indicate your decision by deleting  the provisions above
 * and replace  them with the notice and other provisions required by the GPL License.
 * If you do not delete the provisions above, a recipient may use your version of
 * this file under either the MPL or the GPL.
 */

import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.GraphicsEnvironment;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class Main {
    /**
     * @see http://stackoverflow.com/questions/922052/testing-whether-a-font-is-monospaced-in-java
     */
    public static List<String> getMonospacedFontNames() {

        List<String> monospaceFontFamilyNames = new ArrayList<String>();

        GraphicsEnvironment graphicsEnvironment = GraphicsEnvironment.getLocalGraphicsEnvironment();
        String[] fontFamilyNames = graphicsEnvironment.getAvailableFontFamilyNames();

        BufferedImage bufferedImage = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
        Graphics graphics = bufferedImage.createGraphics();

        for (String fontFamilyName : fontFamilyNames) {
            boolean isMonospaced = true;

            int fontStyle = Font.PLAIN;
            int fontSize = 12;
            Font font = new Font(fontFamilyName, fontStyle, fontSize);
            FontMetrics fontMetrics = graphics.getFontMetrics(font);

            int firstCharacterWidth = 0;
            boolean hasFirstCharacterWidth = false;
            for (int codePoint = 0; codePoint < 128; codePoint++) {
                if (Character.isValidCodePoint(codePoint)
                        && (Character.isLetter(codePoint) || Character.isDigit(codePoint))) {
                    char character = (char) codePoint;
                    int characterWidth = fontMetrics.charWidth(character);
                    if (hasFirstCharacterWidth) {
                        if (characterWidth != firstCharacterWidth) {
                            isMonospaced = false;
                            break;
                        }
                    } else {
                        firstCharacterWidth = characterWidth;
                        hasFirstCharacterWidth = true;
                    }
                }
            }

            if (isMonospaced) {
                monospaceFontFamilyNames.add(fontFamilyName);
            }
        }

        graphics.dispose();

        Collections.sort(monospaceFontFamilyNames);
        return monospaceFontFamilyNames;

    }
}

Java FontMetrics getMonospacedFontNames()

Description

License

Declaration

Method Source Code

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