Multi tool use

Black flashing around drawn image

I'm currently trying to draw an image to a JFrame (just a nonsense test image). In the code bite below, the image is drawn to the JFrame, but the area around the image that doesn't fill JFrame is black that rapidly flashes.

Here is the code below:

try {

myImage = ImageIO.read(ImagesMain.class.getResource("/Textures/TestImage.png"));

}catch(Exception e) {
e.printStackTrace();
}

BufferStrategy strategy = null;

while(strategy == null) {//I know this is terrible practice, just doing this way because its inside main

strategy = myCanvas.getBufferStrategy();

if(myCanvas.getBufferStrategy() == null) {
myCanvas.createBufferStrategy(3);
}
}



myFrame.setVisible(true);

//Rendering part


while(true) {
do {
do {

g = strategy.getDrawGraphics();
g.setColor(Color.WHITE);
g.drawImage(myImage, 20, 20, null);
g.dispose();

}while(strategy.contentsRestored());

strategy.show();

}while(strategy.contentsLost());
}


I've tested and retested my code several times to no avail. I should also add that this is all done in the main method (for testing purposes). Long story short, how do I display my image without the unnecessary black flashing around the image?

Graphics

1 Answer
1

When this happens, it is because one is not clearing the Frame to which they are drawing. In this instance,
g.clearRect(x, y, height, width); is needed to clear the drawing frame and display a clear image.

g.clearRect(x, y, height, width);

Answer courtesy of @MadProgrammer above, in comments.

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