Java ImageIO, convert Image to File

Question

So I'm trying to take an BufferedImage and convert it into a type File, but ImageIO.write will only let me write the image to a file... I've looked at the source code and can't seem to find a way to convert an Image to a File, that isn't writing it to a file.

        // array of puzzle piece images
        BufferedImage puzzle_pieces[] = new BufferedImage[num_pieces];

        // make the pieces to the puzzle
        for (int current_row = 0; current_row < rows; current_row++)
        {
            for (int current_column = 0; current_column < columns; current_column++)
            {
                // initializes image array with pieces
                puzzle_pieces[count] = new BufferedImage(pieceWidth, pieceHeight, puzzle_image.getType());

                // draws the image for each piece  
                Graphics2D piece = puzzle_pieces[count++].createGraphics();  
                piece.drawImage(puzzle_image, 0, 0, pieceWidth, pieceHeight, pieceWidth * current_column, pieceHeight * current_row, 
                            pieceWidth * current_column + pieceWidth, pieceHeight * current_row + pieceHeight, null);  
                piece.dispose(); 
            }
        }

        // put pieces into array 
        for (int i = 0; i < num_pieces; i++) 
        {  
            //Put pieces into array of type File 
        }

What exactly are you trying to accomplish by converting the Image to a File? — kviiri, Oct 27 '13 at 17:38
The type File only represents a path to a file. Converting an image to a File doesn't make much sense. If you want a File, then create it from scratch: `new File("image.png")` — JB Nizet, Oct 27 '13 at 17:40
I split an image into pieces... but I want to load those pieces into my program not save them as a .jpeg. I have a function that saves the pieces to file. But, I need the pieces to remain files in my program, not "Image"s. — visc, Oct 27 '13 at 17:45
That doesn't make any sense. A File is only a file path with added convenience features. — kviiri, Oct 27 '13 at 17:55

score 1 · Answer 1 · edited May 23 '17 at 11:51

1

No File is needed here. Simply cut up the BufferedImage into separate images using getSubimage(x,y,w,h).

That technique is used in this answer to divide the image (loaded as a BufferedImage) into sub images for the various parts of the control. The mouse is hovering over the 'to right' control, showing the variant image used to show focus.

edited May 23 '17 at 11:51

Community

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answered Oct 27 '13 at 21:56

Andrew Thompson

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Java ImageIO, convert Image to File

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