將緩衝圖像設置爲單個彩色像素而不將圖像置入其中的簡單方法？

Question

所以我只是想設置一個緩衝的圖像成一個單一的背景顏色有沒有辦法做到這一點？

Answer 1

你的意思是用背景色填充BufferedImage？如果是這樣，這裏是一個如何執行此操作的示例：

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(); 
      } 
     }); 
    } 

}