一种将缓冲图像设置为单色像素而不将图像放入其中的简单方法

Question

所以我只想将缓冲图像设置为单一背景色，有办法做到这一点吗？

Answer 1

您的意思是用背景色填充BufferedImage吗？如果是这样，这里有一个如何执行的示例：

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;
public class TestBufferedImage {
    private BufferedImage buffer;
    protected BufferedImage getBuffer() {
        if (buffer == null) {
            buffer = new BufferedImage(400, 300, BufferedImage.TYPE_INT_RGB);
            Graphics2D g = buffer.createGraphics();
            g.setColor(Color.BLUE);
            g.fillRect(0, 0, buffer.getWidth(), buffer.getHeight());
            g.dispose();
        }
        return buffer;
    }
    protected void initUI() {
        final JFrame frame = new JFrame();
        frame.setTitle(TestBufferedImage.class.getSimpleName());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JLabel image = new JLabel(new ImageIcon(getBuffer()));
        frame.add(image);
        frame.pack();
        frame.setVisible(true);
    }
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                TestBufferedImage test = new TestBufferedImage();
                test.initUI();
            }
        });
    }
}