java字体显示不正确 [英] java fonts not displaying properly

问题描述

当我从一个文件中导入一个字体时，它真的显得很奇怪。这是我的代码：

这是我的代码：

pre> public void paint（Graphics g2）{
Graphics2D g =（Graphics2D）g2;
//< editor-fold defaultstate =折叠desc =FontGetter>

字体f = null;
尝试{
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment（）;
ge.registerFont（（f = Font.createFont（Font.TRUETYPE_FONT，getClass（）。getResourceAsStream（Triforce.ttf））））;
} catch（IOException e）{
e.printStackTrace（）;

catch（FontFormatException e）
{
e.printStackTrace（）;
}
//< / editor-fold>
g.setFont（f.deriveFont（2））;
g.drawString（sdfsdfetf，100，100）;



解决方案

href =http://docs.oracle.com/javase/7/docs/api/java/awt/Font.html#createFont(int,%20java.io.InputStream） =nofollow noreferrer> Font＃createFont Java文档

积分大小为1 ，样式为PLAIN ...

这意味着你需要从 Font 中派生一个新的 Font 例如

  try {
 GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment（）; 
 Font f = Font.createFont（Font.TRUETYPE_FONT，getClass（）。getResourceAsStream（/ Triforce.ttf））; 
 if（！ge.registerFont（f））{
 System.out.println（Unable to register font）; 
} 
 f = f.deriveFont（Font.PLAIN，24）; 
 setFont（f）; 
} catch（IOException e）{
 e.printStackTrace（）; 
} catch（FontFormatException e）{
 e.printStackTrace（）; 
} 
  

您应该在paint方法的上下文之外预加载字体（并应用它的属性）。绘画应该尽可能快地运行，并且会被多次调用，有时会连续快速地调用。在任何paint方法中加载资源浪费时间和资源...

作为一个例子...

  import java.awt.Dimension; 
 import java.awt.EventQueue; 
 import java.awt.Font; 
 import java.awt.FontFormatException; 
 import java.awt.FontMetrics; 
 import java.awt.Graphics; 
 import java.awt.Graphics2D; 
 import java.awt.GraphicsEnvironment; 
 import java.io.IOException; 
 import javax.swing.JFrame; 
 import javax.swing.JPanel; 
 import javax.swing.UIManager; 
 import javax.swing.UnsupportedLookAndFeelException; 
 
 public class Test1 {
 
 public static void main（String [] args）{
 new Test1（）; 
 
 $ b $ public Test1（）{
 EventQueue.invokeLater（new Runnable（）{
 @Override 
 public void run（）{
 $ try {
 UIManager.setLookAndFeel（UIManager.getSystemLookAndFeelClassName（））; 
} catch（ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex）{
 ex.printStackTrace（）; 
} 
 
 JFrame frame = new JFrame（Testing）; 
 frame.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）; 
 frame.add（new TestPane（））; 
 frame.pack（）; 
 frame.setLocationRelativeTo（null）; 
 frame.setVisible（true）; 
} 
}）; 
 
 $ b $ public class TestPane extends JPanel {
 $ b $ public TestPane（）{
 try {
 GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment（） ; 
 Font f = Font.createFont（Font.TRUETYPE_FONT，getClass（）。getResourceAsStream（/ Triforce.ttf））; 
 if（！ge.registerFont（f））{
 System.out.println（Unable to register font）; 
} 
 f = f.deriveFont（Font.PLAIN，24）; 
 setFont（f）; 
} catch（IOException e）{
 e.printStackTrace（）; 
} catch（FontFormatException e）{
 e.printStackTrace（）; 
 
 
 $ b $覆盖
 public Dimension getPreferredSize（）{
 return new Dimension（200，200）; 
} 
 
 @Override 
保护void paintComponent（Graphics g）{
 super.paintComponent（g）; 
 Graphics2D g2d =（Graphics2D）g.create（）; 
 FontMetrics fm = g2d.getFontMetrics（）; 
 String text =Hello world; 
 int x =（getWidth（） -  fm.stringWidth（text））/ 2; 
 int y =（（getHeight（） -  fm.getHeight（））+ fm.getAscent（））/ 2; 
 g2d.drawString（text，x，y）; 
 g2d.dispose（）; 
} 
 
} 
 
} 
  

when i import a font from a file, it displays really weirdly. it was supposed to say "TEST", but it just said "_".

here is my code:

public void paint(Graphics g2){
Graphics2D g = (Graphics2D)g2;
//<editor-fold defaultstate="collapsed" desc="FontGetter">

Font f = null;
try {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    ge.registerFont((f = Font.createFont(Font.TRUETYPE_FONT, getClass().getResourceAsStream("Triforce.ttf"))));
} catch (IOException e) {
    e.printStackTrace();
}
catch(FontFormatException e)
{
    e.printStackTrace();
}
//</editor-fold>
g.setFont(f.deriveFont(2));
g.drawString("sdfsdfetf", 100, 100);
}

解决方案

As specified by the Font#createFont Java Docs

... The new Font is created with a point size of 1 and style PLAIN ...

(emphasis applied by me)

This means that you need to derive a new Font instance from this Font with the required properties, for example

try {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    Font f = Font.createFont(Font.TRUETYPE_FONT, getClass().getResourceAsStream("/Triforce.ttf"));
    if (!ge.registerFont(f)) {
        System.out.println("Unable to register font");
    }
    f = f.deriveFont(Font.PLAIN, 24);
    setFont(f);
} catch (IOException e) {
    e.printStackTrace();
} catch (FontFormatException e) {
    e.printStackTrace();
}

You should pre-load you font (and apply it's properties) outside of the context of the paint method. Painting should run as fast as possible and will be called multiple times, sometimes in quick succession. Loading resources within any paint method wastes time and resource...

As an example...

import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.FontFormatException;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsEnvironment;
import java.io.IOException;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class Test1 {

    public static void main(String[] args) {
        new Test1();
    }

    public Test1() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class TestPane extends JPanel {

        public TestPane() {
            try {
                GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
                Font f = Font.createFont(Font.TRUETYPE_FONT, getClass().getResourceAsStream("/Triforce.ttf"));
                if (!ge.registerFont(f)) {
                    System.out.println("Unable to register font");
                }
                f = f.deriveFont(Font.PLAIN, 24);
                setFont(f);
            } catch (IOException e) {
                e.printStackTrace();
            } catch (FontFormatException e) {
                e.printStackTrace();
            }
        }

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(200, 200);
        }

        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D g2d = (Graphics2D) g.create();
            FontMetrics fm = g2d.getFontMetrics();
            String text = "Hello world";
            int x = (getWidth() - fm.stringWidth(text)) / 2;
            int y = ((getHeight() - fm.getHeight()) + fm.getAscent()) / 2;
            g2d.drawString(text, x, y);
            g2d.dispose();
        }

    }

}

这篇关于java字体显示不正确的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！