如何在java中调整文本大小

Question

我已经看到,在photoshop文本中只需拖动即可轻松调整大小.我们如何在Java中做同样的事情？关于如何在java中调整文本大小的任何想法？添加了在photoshop中调整大小的字母"A"的快照

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请告诉我这段代码有什么问题？

public class ResizeImage extends JFrame {

    public ResizeImage(){
        JPanel panel = new JPanel(){
            public void paintComponent(Graphics g) {
                // In your paint(Graphics g) method
                // Create a buffered image for use as text layer
                BufferedImage textLayer = new BufferedImage(240, 240, 
                                              BufferedImage.TYPE_INT_RGB);

                // Get the graphics instance of the buffered image
            Graphics2D gBuffImg = textLayer.createGraphics();

                // Draw the string
                gBuffImg.drawString("Hello World", 10, 10);

                // Rescale the string the way you want it
                gBuffImg.scale(200, 50);

                // Draw the buffered image on the output's graphics object
                g.drawImage(textLayer, 0, 0, null);
                gBuffImg.dispose();
            }
        };
        add(panel);
    }

    public static void main(String [] args){
        ResizeImage frame = new ResizeImage();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
        frame.setSize(300, 300);
        frame.setVisible(true);
    }
} 

Answer 1

一种方法是使用AffineTransform(这种变体也会淡化颜色).

import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import javax.swing.*;
import java.io.File;
import javax.imageio.ImageIO;

public class StretchText {

    public static void main(String[] args) throws Exception {
        // used to stretch the graphics instance sideways
        AffineTransform stretch = new AffineTransform();
        int w = 640; // image width
        int h = 200; // image height
        int f = 21; // Font size in px
        String s = "The quick brown fox jumps over the lazy dog.";

        final BufferedImage bi = new BufferedImage(
                w,h,BufferedImage.TYPE_INT_RGB);
        Graphics2D g = bi.createGraphics();
        g.setFont(new Font("Serif",Font.PLAIN,f));
        g.setRenderingHint(
                RenderingHints.KEY_TEXT_ANTIALIASING, 
                RenderingHints.VALUE_TEXT_ANTIALIAS_ON);

        // paint BG
        g.setColor(Color.WHITE);
        g.fillRect(0, 0, w, h);
        g.setColor(Color.BLACK);

        for (int i=0; (i*f)+f<=h; i++) {
            g.drawString(s, 0, (i*f)+f);
            // stretch
            stretch.concatenate(
                    AffineTransform.getScaleInstance(1.18, 1d));
            g.setTransform(stretch);

            // fade
            Color c = g.getColor();
            g.setColor(new Color (
                    c.getRed(),
                    c.getGreen(),
                    c.getBlue(),
                    (int)(c.getAlpha()*.75)));
        }

        g.dispose();

        ImageIO.write(bi, "png", new File(
                new File(System.getProperty("user.home")), 
                "StretchText.png"));
        Runnable r = new Runnable() {
            @Override
            public void run() {
                JLabel gui = new JLabel(new ImageIcon(bi));
                JOptionPane.showMessageDialog(null, gui);
            }
        };
        SwingUtilities.invokeLater(r);
    }
}

Answer 2

你可以定义字体类型

例如

Font f = new Font("SansSerif", Font.BOLD, 40)