渲染Java组件到图像文件

Question

可能重复：
Java Swing : Obtain Image of JFrame

你怎么什么是Java的GUI组件显示保存为图像文件？

例如将JPanel作为PNG呈现。

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

将被descibed与外观极好的例子here通过@Andrew汤普森，但你可以通过阅读2D Graphics和实例为here