How to set custom size for cursor in swing?

I am using the below code to set a custom cursor for JPanel, but when i run the code its enlarging the image which i set for cursor. Is there a way to set a userdefined cursor size ?

Toolkit toolkit = Toolkit.getDefaultToolkit();
BufferedImage erasor=ne开发者_开发技巧w BufferedImage(10,10, BufferedImage.TYPE_INT_RGB);
Graphics2D g2d=(Graphics2D) erasor.createGraphics();
g2d.setPaint(Color.red);
g2d.drawRect(e.getX(),e.getY() ,10, 10);
toolkit.getBestCursorSize(10, 10);
Cursor mcursor=toolkit.createCustomCursor(erasor, new Point(10,10), "Eraser");
setCursor(mcursor);

Windows seem to only allow cursors of size 32x32 pixels so if you want another size you have to work around it.

To get a smaller size use createCustomCursor() with a 32x32 image where the unwanted pixels are transparent. If you use BufferedImage.TYPE_INT_ARGB you can make pixels transparent.

To make a larger cursor I believe this will work:

• Create a custom cursor that is completely transparent.

• Use a mouseMotionListener to get the position of the cursor.

• Draw your cursor image at the position of the real (transparent) cursor.

An easy solution would be to use an image of "standard" size and transparent background.

You can determine the cursor size at runtime, it is controlled by the 'best-size'.

Dimension aBestSize = Toolkit.getDefaultToolkit().getBestCursorSize(0, 0);

(For windows this is 32x32)

Then blit the cursor image of the size you want onto a transparent buffered image of the best size, it will no longer be resized.

Windows has a defult cursor, which is always 32x32 pixels. You can set a image aa cursor with a other size, but windows resize this image to 32x32 pixel, which can trigger other side effects especially when your image is not quadratic.

You can do a workaround with a transparent image like in this example.

    /**
     * Create a transparent cursor with a given frame. Note: The name of the
     * cursor is <code>Trans</code>.
     * <br>
     * <b>Note</b>: The maximal size for the cursor is 32x32 pixel under windows.
     * Technically it is possible to create a cursor bigger than 32x32 pixel, but this method must run under windows 
     * and so the size is limited to 32 pixel.
     * 
     * @param size the size of the frame (horizontal/vertical) 
     * <br>
     * <b>Note</b>: maximal size is 32 pixel.
     * @param frameThickness the thickness of the frame
     * @param frameColor the color of the frame
     * @return a cursor which is a frame with the given size and color.
     */

    public static synchronized Cursor createTransparentCursor( int size, int frameThickness, Color frameColor ) {

            final int cursourSize = size + (2 * frameThickness);
            System.out.println("cursourSize: "+cursourSize);

            final BufferedImage bufferedImage = new BufferedImage( 32 + 2, 32 + 2, BufferedImage.TYPE_INT_ARGB );
            final Graphics graphic = bufferedImage.getGraphics();
            final Color colTrans = new Color( 0, 0, 0, 0 );
            for( int i = 0 ; i < cursourSize ; i++ ){
                    for( int j = 0 ; j < cursourSize ; j++ ){
                            if( i <= frameThickness || i > cursourSize - frameThickness -1 || j <= frameThickness
                                            | j > cursourSize - frameThickness - 1 ){
                                    graphic.setColor( frameColor );
                            }
                            else{
                                    graphic.setColor( colTrans );
                            }
                            graphic.fillRect( i, j, 1, 1 );
                    }
            }
            System.out.println("Buffered size:" +bufferedImage.getHeight() +"/"+ bufferedImage.getWidth());
            final Point hotSpot = new Point( cursourSize / 2, cursourSize / 2 );
            return Toolkit.getDefaultToolkit().createCustomCursor( bufferedImage, hotSpot, "Trans" );
    }

Sorry, but I can't upload a image of this facts. I don't have enough reputations. ;/