Java converting Image to BufferedImage

Question

There is already question like this link on StackOverflow and the accepted answer is  casting    Image image   ImageIO read new File file    BufferedImage buffered    BufferedImage  image    In my program I try   final float FACTOR    4f  BufferedImage img   ImageIO read new File  graphic png     int scaleX    int   img getWidth     FACTOR   int scaleY    int   img getHeight     FACTOR   Image image   img getScaledInstance scaleX  scaleY  Image SCALE SMOOTH   BufferedImage buffered    BufferedImage  image    Unfortunatelly I get run time error       sun awt image ToolkitImage cannot be cast to java awt image BufferedImage   Obviously casting does not work  Question is  What is  or is there  the proper way of converting Image to BufferedImage

User · Answer

One way to handle this is to create a new BufferedImage, and tell it's graphics object to draw your scaled image into the new BufferedImage:

final float FACTOR  = 4f;
BufferedImage img = ImageIO.read(new File("graphic.png"));
int scaleX = (int) (img.getWidth() * FACTOR);
int scaleY = (int) (img.getHeight() * FACTOR);
Image image = img.getScaledInstance(scaleX, scaleY, Image.SCALE_SMOOTH);
BufferedImage buffered = new BufferedImage(scaleX, scaleY, TYPE);
buffered.getGraphics().drawImage(image, 0, 0 , null);

That should do the trick without casting.

User · Answer

From a Java Game Engine          Converts a given Image into a BufferedImage        param img The Image to be converted     return The converted BufferedImage     public static BufferedImage toBufferedImage Image img        if  img instanceof BufferedImage                return  BufferedImage  img                Create a buffered image with transparency     BufferedImage bimage   new BufferedImage img getWidth null   img getHeight null   BufferedImage TYPE INT ARGB           Draw the image on to the buffered image     Graphics2D bGr   bimage createGraphics        bGr drawImage img  0  0  null       bGr dispose            Return the buffered image     return bimage

User · Answer

If you use Kotlin  you can add an extension method to Image in the same manner Sri Harsha Chilakapati suggests   fun Image toBufferedImage    BufferedImage       if  this is BufferedImage            return this           val bufferedImage   BufferedImage this getWidth null   this getHeight null   BufferedImage TYPE INT ARGB       val graphics2D   bufferedImage createGraphics       graphics2D drawImage this  0  0  null      graphics2D dispose        return bufferedImage     And use it like this   myImage toBufferedImage

User · Answer

If you are getting back a sun awt image ToolkitImage  you can cast the Image to that  and then use getBufferedImage   to get the BufferedImage   So instead of your last line of code where you are casting you would just do   BufferedImage buffered     ToolkitImage  image  getBufferedImage

[java] Java converting Image to BufferedImage

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