java Graphics2D - 生成动态图像

Question

我正在学习 Java Graphics2D，我在生成图像时遇到了问题。

请找到以下代码和输出图像：

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

public class DynamicImage {

    public static void main(String[] args) {

            Dimension imgDim = new Dimension(1000,1000);
            BufferedImage buffImage = new BufferedImage(imgDim.width, imgDim.height, BufferedImage.TYPE_INT_RGB);

            Graphics2D g2d = buffImage.createGraphics();
            g2d.setBackground(Color.WHITE);
            g2d.fillRect(0, 0, imgDim.width, imgDim.height);
            g2d.setColor(Color.BLACK);
            BasicStroke bs = new BasicStroke(2);
            g2d.setStroke(bs);

            Font font = new Font("Arial", Font.PLAIN, 20);
            g2d.setFont(font);

            String[] alphabets = {"A","B","C","D","E","F","G","H","I","J","K"};

            for(int i=0;i<alphabets.length;i++) {
                g2d.drawString(alphabets[i], (50*(i)), 500);
                g2d.drawLine((50*(i)), 500, (50*(i+1)), 500);
            }
        try {
            ImageIO.write(buffImage, "png", new File("C:\Alphabets.png"));
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
}

正如您在上面注意到的那样，字母与线条重叠，这是我不想要的，换句话说，我希望输出如下： A____B___C___D___E___F___G___H___I___J___K___

能否请您帮助更正上述代码以获得所需的输出？

Answer 1

您将需要使用 FontMetrics class:

FontMetrics fm = g2d.getFontMetrics();

然后你需要得到每个字符的宽度：

int width = fm.stringWidth( alphabets[i] );

然后开始画字宽后的线：

g2d.drawLine((50*(i)) + width, 500, (50*(i+1)), 500);

以上逻辑未经测试，但希望你能明白。

java Graphics2D - 生成动态图像

java Graphics2D - generate dynamic image

java

swing

image

awt