Java/2D Graphics GUI/Font
Содержание
- 1 A cache of the dynamically loaded fonts found in the fonts directory
- 2 Create font from true type font
- 3 Display font in a grid
- 4 Draw font inside a Rectangle
- 5 Finds and displays available fonts
- 6 Font centered
- 7 FontDemo lists the system fonts and provides a sample of each one(Have some problems)
- 8 Font Derivation
- 9 Font List
- 10 Font paint
- 11 Load font from ttf file
- 12 Obtain FontMetrics of different fonts
- 13 Outline Font paint
- 14 Wrap string according to FontMetrics
A cache of the dynamically loaded fonts found in the fonts directory
/*
* @(#)DemoFonts.java 1.17 06/08/29
*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* -Redistribution of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* -Redistribution in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
* ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
* OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
* AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
* AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
* REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
* INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
* OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
* EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or intended
* for use in the design, construction, operation or maintenance of any
* nuclear facility.
*/
/*
* @(#)DemoFonts.java 1.17 06/08/29
*/
import java.awt.Font;
import java.io.InputStream;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* A cache of the dynamically loaded fonts found in the fonts directory.
*/
public class DemoFonts {
// Prepare a static "cache" mapping font names to Font objects.
private static String[] names = { "A.ttf" };
private static Map<String, Font> cache = new ConcurrentHashMap<String, Font>(names.length);
static {
for (String name : names) {
cache.put(name, getFont(name));
}
}
public static Font getFont(String name) {
Font font = null;
if (cache != null) {
if ((font = cache.get(name)) != null) {
return font;
}
}
String fName = "/fonts/" + name;
try {
InputStream is = DemoFonts.class.getResourceAsStream(fName);
font = Font.createFont(Font.TRUETYPE_FONT, is);
} catch (Exception ex) {
ex.printStackTrace();
System.err.println(fName + " not loaded. Using serif font.");
font = new Font("serif", Font.PLAIN, 24);
}
return font;
}
}
Create font from true type font
import java.awt.Font;
import java.io.File;
import java.io.FileInputStream;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class Main {
public static void main(String[] args) throws Exception {
File f = new File("your.ttf");
FileInputStream in = new FileInputStream(f);
Font dynamicFont = Font.createFont(Font.TRUETYPE_FONT, in);
Font dynamicFont32Pt = dynamicFont.deriveFont(32f);
JLabel testLabel = new JLabel(dynamicFont.getName());
testLabel.setFont(dynamicFont32Pt);
JFrame frame = new JFrame("Font Loading Demo");
frame.getContentPane().add(testLabel);
frame.pack();
frame.setVisible(true);
}
}
Display font in a grid
import java.awt.Font;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Main {
public static void main(String[] args) {
final int columnCount = 10;
final int side = 25;
final int[][] grid = new int[50][columnCount];
JPanel panel = new JPanel() {
public void paintComponent(Graphics g) {
Font font = new Font("WingDings", Font.PLAIN, 14);
g.setFont(font);
int off = 0;
for (int i = 0; i < 256 * 256; i++) {
if (font.canDisplay((char) i) == false) {
continue;
}
off++;
grid[off / columnCount][off % columnCount] = i;
int x = off % columnCount * side;
int y = (off / columnCount) * side + side;
g.drawString(Character.toString((char)i), x, y);
}
}
};
JFrame frame = new JFrame();
panel.setSize(300, 300);
frame.getContentPane().add(panel);
frame.setSize(300, 300);
frame.setVisible(true);
}
}
Draw font inside a Rectangle
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class StringRectPaintPanel extends JPanel {
public void paint(Graphics g) {
g.setFont(new Font("",0,100));
FontMetrics fm = getFontMetrics(new Font("",0,100));
String s = "jexp";
int x = 5;
int y = 5;
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
int h = fm.getHeight();
int w = fm.charWidth(c);
g.drawRect(x, y, w, h);
g.drawString(String.valueOf(c), x, y + h);
x = x + w;
}
}
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(new StringRectPaintPanel());
frame.setSize(500, 300);
frame.setVisible(true);
}
}
Finds and displays available fonts
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.ru/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS""
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun"s Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun"s, and James Gosling"s,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.GraphicsEnvironment;
import java.awt.Toolkit;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
/**
* Finds and displays available fonts
* <p>
* TODO: should be a JTable with the text name in one column and the demo in a
* JLabel in the other.
*
* @author Ian Darwin (original)
*/
public class FontDemo extends JComponent {
/** The list of Fonts */
protected String[] fontNames;
/** The fonts themselves */
protected Font[] fonts;
/** How much space between each name */
static final int YINCR = 20;
/**
* Construct a FontDemo -- Sets title and gets array of fonts on the system
*/
public FontDemo() {
Toolkit toolkit = Toolkit.getDefaultToolkit();
// For JDK 1.1: returns about 10 names (Serif, SansSerif, etc.)
// fontNames = toolkit.getFontList();
// For JDK 1.2: a much longer list; most of the names that come
// with your OS (e.g., Arial, Lucida, Lucida Bright, Lucida Sans...)
fontNames = GraphicsEnvironment.getLocalGraphicsEnvironment()
.getAvailableFontFamilyNames();
fonts = new Font[fontNames.length];
}
public Dimension getPreferredSize() {
return new Dimension(500, fontNames.length * YINCR);
}
/**
* Draws the font names in its font. Called by AWT when painting is needed
* Does lazy evaluation of Font creation, caching the results (without this,
* scrolling performance suffers even on a P3-750).
*/
public void paint(Graphics g) {
for (int i = 0; i < fontNames.length; i += 1) {
if (fonts[i] == null) {
fonts[i] = new Font(fontNames[i], Font.BOLD, 14);
}
g.setFont(fonts[i]);
int x = 20;
int y = 20 + (YINCR * i);
g.drawString(fontNames[i], x, y);
}
}
/** Simple main program to start it running */
public static void main(String[] args) {
JFrame f = new JFrame("Font Demo");
f.getContentPane().add(new JScrollPane(new FontDemo()));
f.setSize(600, 700);
f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
Font centered
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.font.FontRenderContext;
import java.awt.geom.Rectangle2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class HorizontallyCenteredText extends JPanel {
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2.setFont(new Font("Serif", Font.PLAIN, 48));
paintHorizontallyCenteredText(g2, "Java Source", 200, 75);
paintHorizontallyCenteredText(g2, "and", 200, 125);
paintHorizontallyCenteredText(g2, "Support", 200, 175);
}
protected void paintHorizontallyCenteredText(Graphics2D g2, String s,
float centerX, float baselineY) {
FontRenderContext frc = g2.getFontRenderContext();
Rectangle2D bounds = g2.getFont().getStringBounds(s, frc);
float width = (float) bounds.getWidth();
g2.drawString(s, centerX - width / 2, baselineY);
}
public static void main(String[] args) {
JFrame f = new JFrame();
f.getContentPane().add(new HorizontallyCenteredText());
f.setSize(450, 350);
f.show();
}
}
FontDemo lists the system fonts and provides a sample of each one(Have some problems)
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.ru/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS""
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun"s Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun"s, and James Gosling"s,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
////
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.Label;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/** FontDemo lists the system fonts and provides a sample of each one */
public class FontDemoLabel extends JFrame {
String fl[];
JPanel p;
public FontDemoLabel() {
super("Font Demo - Label");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container cp = getContentPane();
// get font name list
fl = GraphicsEnvironment.getLocalGraphicsEnvironment()
.getAvailableFontFamilyNames();
// IGNORE the setLayout and North/South stuff...
// we will discuss it in a few pages!
cp.setLayout(new BorderLayout());
cp.add(BorderLayout.NORTH, new Label("Number of Fonts = " + fl.length,
Label.CENTER));
cp.add(BorderLayout.CENTER, p = new JPanel());
p.setLayout(new GridLayout(5, 0, 5, 5));
for (int i = 0; i < fl.length; i++) {
JLabel lab;
// The crux of the matter: for each font name,
// create a label using the name as the text,
// AND set the font to be the named font!
p.add(lab = new JLabel(fl[i]));
lab.setFont(new Font(fl[i], Font.ITALIC | Font.BOLD, 14));
}
pack();
}
public static void main(String[] av) {
new FontDemoLabel().setVisible(true);
}
}
Font Derivation
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.font.TextAttribute;
import java.awt.geom.AffineTransform;
import java.util.Hashtable;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class FontDerivation extends JPanel {
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// Create a 1-point font.
Font font = new Font("Serif", Font.PLAIN, 1);
float x = 20, y = 20;
Font font24 = font.deriveFont(24.0f);
g2.setFont(font24);
g2.drawString("font.deriveFont(24.0f)", x, y += 30);
Font font24italic = font24.deriveFont(Font.ITALIC);
g2.setFont(font24italic);
g2.drawString("font24.deriveFont(Font.ITALIC)", x, y += 30);
AffineTransform at = new AffineTransform();
at.shear(.2, 0);
Font font24shear = font24.deriveFont(at);
g2.setFont(font24shear);
g2.drawString("font24.deriveFont(at)", x, y += 30);
Hashtable attributes = new Hashtable();
attributes.put(TextAttribute.WEIGHT, TextAttribute.WEIGHT_BOLD);
Font font24bold = font24.deriveFont(attributes);
g2.setFont(font24bold);
g2.drawString("font24.deriveFont(attributes)", x, y += 30);
}
public static void main(String[] args) {
JFrame f = new JFrame();
f.getContentPane().add(new FontDerivation());
f.setSize(350, 250);
f.show();
}
}
Font List
/*
* Copyright (c) 2000 David Flanagan. All rights reserved.
* This code is from the book Java Examples in a Nutshell, 2nd Edition.
* It is provided AS-IS, WITHOUT ANY WARRANTY either expressed or implied.
* You may study, use, and modify it for any non-commercial purpose.
* You may distribute it non-commercially as long as you retain this notice.
* For a commercial use license, or to purchase the book (recommended),
* visit http://www.davidflanagan.ru/javaexamples2.
*/
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
/**
* An applet that displays the standard fonts and styles available in Java 1.1
*/
public class FontList extends JPanel {
// The available font families
String[] families = { "Serif", // "TimesRoman" in Java 1.0
"SansSerif", // "Helvetica" in Java 1.0
"Monospaced" }; // "Courier" in Java 1.0
// The available font styles and names for each one
int[] styles = { Font.PLAIN, Font.ITALIC, Font.BOLD,
Font.ITALIC + Font.BOLD };
String[] stylenames = { "Plain", "Italic", "Bold", "Bold Italic" };
// Draw the applet.
public void paint(Graphics g) {
for (int f = 0; f < families.length; f++) { // for each family
for (int s = 0; s < styles.length; s++) { // for each style
Font font = new Font(families[f], styles[s], 18); // create font
g.setFont(font); // set font
String name = families[f] + " " + stylenames[s]; // create name
g.drawString(name, 20, (f * 4 + s + 1) * 20); // display name
}
}
}
public static void main(String[] a) {
JFrame f = new JFrame();
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
f.setContentPane(new FontList());
f.setSize(300,300);
f.setVisible(true);
}
}
Font paint
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphVector;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class SimpleFont extends JPanel{
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
String s = "Java Source and Support";
Font font = new Font("Serif", Font.PLAIN, 24);
FontRenderContext frc = g2.getFontRenderContext();
GlyphVector gv = font.createGlyphVector(frc, s);
g2.drawGlyphVector(gv, 40, 60);
}
public static void main(String[] args) {
JFrame f = new JFrame();
f.getContentPane().add(new SimpleFont());
f.setSize(350, 250);
f.show();
}
}
Load font from ttf file
/*
* @(#)DemoFonts.java 1.17 06/08/29
*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* -Redistribution of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* -Redistribution in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
* ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
* OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
* AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
* AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
* REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
* INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
* OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
* EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or intended
* for use in the design, construction, operation or maintenance of any
* nuclear facility.
*/
/*
* @(#)DemoFonts.java 1.17 06/08/29
*/
import java.awt.Font;
import java.io.InputStream;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* A cache of the dynamically loaded fonts found in the fonts directory.
*/
public class DemoFonts {
// Prepare a static "cache" mapping font names to Font objects.
private static String[] names = { "A.ttf" };
private static Map<String, Font> cache = new ConcurrentHashMap<String, Font>(names.length);
static {
for (String name : names) {
cache.put(name, getFont(name));
}
}
public static Font getFont(String name) {
Font font = null;
if (cache != null) {
if ((font = cache.get(name)) != null) {
return font;
}
}
String fName = "/fonts/" + name;
try {
InputStream is = DemoFonts.class.getResourceAsStream(fName);
font = Font.createFont(Font.TRUETYPE_FONT, is);
} catch (Exception ex) {
ex.printStackTrace();
System.err.println(fName + " not loaded. Using serif font.");
font = new Font("serif", Font.PLAIN, 24);
}
return font;
}
}
Obtain FontMetrics of different fonts
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
public class Main extends JFrame {
public Main() {
super("Demonstrating FontMetrics");
setSize(510, 210);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void paint(Graphics g) {
g.setFont(new Font("SansSerif", Font.BOLD, 12));
FontMetrics fm = g.getFontMetrics();
g.drawString("Current font: " + g.getFont(), 10, 40);
g.drawString("Ascent: " + fm.getAscent(), 10, 55);
g.drawString("Descent: " + fm.getDescent(), 10, 70);
g.drawString("Height: " + fm.getHeight(), 10, 85);
g.drawString("Leading: " + fm.getLeading(), 10, 100);
Font font = new Font("Serif", Font.ITALIC, 14);
fm = g.getFontMetrics(font);
g.setFont(font);
g.drawString("Current font: " + font, 10, 130);
g.drawString("Ascent: " + fm.getAscent(), 10, 145);
g.drawString("Descent: " + fm.getDescent(), 10, 160);
g.drawString("Height: " + fm.getHeight(), 10, 175);
g.drawString("Leading: " + fm.getLeading(), 10, 190);
}
public static void main(String args[]) {
Main app = new Main();
}
}
Outline Font paint
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.font.FontRenderContext;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;
import java.net.URL;
import javax.swing.JApplet;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class FontPaint extends JApplet {
public void init() {
FontPanel fontPanel = new FontPanel();
getContentPane().add(fontPanel, BorderLayout.CENTER);
}
public static void main(String[] args) {
FontPanel starPanel = new FontPanel();
JFrame f = new JFrame("Font");
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
f.getContentPane().add(starPanel, BorderLayout.CENTER);
f.setSize(new Dimension(550, 200));
f.setVisible(true);
}
}
class FontPanel extends JPanel {
public void paintComponent(Graphics g) {
super.paintComponent(g);
setBackground(Color.white);
int width = getSize().width;
int height = getSize().height;
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2.setRenderingHint(RenderingHints.KEY_RENDERING,
RenderingHints.VALUE_RENDER_QUALITY);
FontRenderContext frc = g2.getFontRenderContext();
Font f = new Font("Helvetica", 1, 60);
String s = new String("Java Source and Support.");
TextLayout textTl = new TextLayout(s, f, frc);
AffineTransform transform = new AffineTransform();
Shape outline = textTl.getOutline(null);
Rectangle outlineBounds = outline.getBounds();
transform = g2.getTransform();
transform.translate(width / 2 - (outlineBounds.width / 2), height / 2
+ (outlineBounds.height / 2));
g2.transform(transform);
g2.setColor(Color.blue);
g2.draw(outline);
g2.setClip(outline);
}
}
Wrap string according to FontMetrics
import java.awt.FontMetrics;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
/**
* Globally available utility classes, mostly for string manipulation.
*
* @author Jim Menard,
*/
public class StringUtils {
/**
* Returns an array of strings, one for each line in the string after it has
* been wrapped to fit lines of <var>maxWidth</var>. Lines end with any of
* cr, lf, or cr lf. A line ending at the end of the string will not output a
* further, empty string.
* <p>
* This code assumes <var>str</var> is not <code>null</code>.
*
* @param str
* the string to split
* @param fm
* needed for string width calculations
* @param maxWidth
* the max line width, in points
* @return a non-empty list of strings
*/
public static List wrap(String str, FontMetrics fm, int maxWidth) {
List lines = splitIntoLines(str);
if (lines.size() == 0)
return lines;
ArrayList strings = new ArrayList();
for (Iterator iter = lines.iterator(); iter.hasNext();)
wrapLineInto((String) iter.next(), strings, fm, maxWidth);
return strings;
}
/**
* Given a line of text and font metrics information, wrap the line and add
* the new line(s) to <var>list</var>.
*
* @param line
* a line of text
* @param list
* an output list of strings
* @param fm
* font metrics
* @param maxWidth
* maximum width of the line(s)
*/
public static void wrapLineInto(String line, List list, FontMetrics fm, int maxWidth) {
int len = line.length();
int width;
while (len > 0 && (width = fm.stringWidth(line)) > maxWidth) {
// Guess where to split the line. Look for the next space before
// or after the guess.
int guess = len * maxWidth / width;
String before = line.substring(0, guess).trim();
width = fm.stringWidth(before);
int pos;
if (width > maxWidth) // Too long
pos = findBreakBefore(line, guess);
else { // Too short or possibly just right
pos = findBreakAfter(line, guess);
if (pos != -1) { // Make sure this doesn"t make us too long
before = line.substring(0, pos).trim();
if (fm.stringWidth(before) > maxWidth)
pos = findBreakBefore(line, guess);
}
}
if (pos == -1)
pos = guess; // Split in the middle of the word
list.add(line.substring(0, pos).trim());
line = line.substring(pos).trim();
len = line.length();
}
if (len > 0)
list.add(line);
}
/**
* Returns the index of the first whitespace character or "-" in <var>line</var>
* that is at or before <var>start</var>. Returns -1 if no such character is
* found.
*
* @param line
* a string
* @param start
* where to star looking
*/
public static int findBreakBefore(String line, int start) {
for (int i = start; i >= 0; --i) {
char c = line.charAt(i);
if (Character.isWhitespace(c) || c == "-")
return i;
}
return -1;
}
/**
* Returns the index of the first whitespace character or "-" in <var>line</var>
* that is at or after <var>start</var>. Returns -1 if no such character is
* found.
*
* @param line
* a string
* @param start
* where to star looking
*/
public static int findBreakAfter(String line, int start) {
int len = line.length();
for (int i = start; i < len; ++i) {
char c = line.charAt(i);
if (Character.isWhitespace(c) || c == "-")
return i;
}
return -1;
}
/**
* Returns an array of strings, one for each line in the string. Lines end
* with any of cr, lf, or cr lf. A line ending at the end of the string will
* not output a further, empty string.
* <p>
* This code assumes <var>str</var> is not <code>null</code>.
*
* @param str
* the string to split
* @return a non-empty list of strings
*/
public static List splitIntoLines(String str) {
ArrayList strings = new ArrayList();
int len = str.length();
if (len == 0) {
strings.add("");
return strings;
}
int lineStart = 0;
for (int i = 0; i < len; ++i) {
char c = str.charAt(i);
if (c == "\r") {
int newlineLength = 1;
if ((i + 1) < len && str.charAt(i + 1) == "\n")
newlineLength = 2;
strings.add(str.substring(lineStart, i));
lineStart = i + newlineLength;
if (newlineLength == 2) // skip \n next time through loop
++i;
} else if (c == "\n") {
strings.add(str.substring(lineStart, i));
lineStart = i + 1;
}
}
if (lineStart < len)
strings.add(str.substring(lineStart));
return strings;
}
}