How can I get height and width of an image?

Question

Why is the following bit of code returns Height: -1 which means that the height is yet not known. How to get height of the image?

 try {
        // Create a          


        

Answer 1

Toolkit#createImage(...) is non-blocking. Generally I would rather use javax.imageio.ImageIOto read images.

To wait for the Toolkit#createImage(...), use:

MediaTracker mediaTracker = new MediaTracker(component);
mediaTracker.addImage(image);
try {
    mediaTracker.waitForAll();
} catch (InterruptedException e) {
    e.printStackTrace();
}

After that, you can call image.getHeight()