渲染Java組件到圖像文件

Question

可能重複：
Java Swing : Obtain Image of JFrame

你怎麼什麼是Java的GUI組件顯示保存爲圖像文件？

例如將JPanel作爲PNG呈現。

Answer 1

JPanel panel = ... 
... 
... 
File yourFileHere = ... 
... 
... 
BufferedImage img = new BufferedImage(panel.getWidth(), panel.getHeight(), BufferedImage.TYPE_INT_ARGB); 
Graphics g = img.getGraphics(); 
panel.paint(g); 
g.dispose(); 

try{ 
    ImageIO.write(img, "png", yourFileHere); 
}catch(IOException e){ 
    e.printStackTrace(); 
} 

Answer 2

將被descibed與外觀極好的例子here通過@Andrew湯普森，但你可以通過閱讀2D Graphics和實例爲here