What is the advantage of using BufferedImage for images?

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What is the advantage of using BufferedImage for images?

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#1 by (3 votes)

3

I want to know the difference in using BufferedImage and the graphics method to draw the images to ImageIcon .

Here is an example:

@Override
    public void paint(Graphics g) {

        g.drawImage(bfImage, 0, 0, this);
        g.drawImage(bfImage2, 10, 350, this);
    }
    public void desenharImagem() {

        try{

            bfImage = ImageIO.read(getClass().getResource("Imagens/cenario.jpg"));
            bfImage2 = ImageIO.read(getClass().getResource("Imagens/0.png"));

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

java imagem swing

asked by anonymous 14.01.2017 / 21:54

1 answer

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score 3 · Accepted Answer

The interface Image is the one that models the behavior of objects representing images in Java.

The class BufferedImage is an implementation of Image which corresponds to images represented by a sequence of pixels stored entirely in memory.

Graphics (as well as its subclass Graphics2D ) does not represents an image, and yes it is an object that does the drawing in images.

A certain analogy that would make (although imperfectly) is that "% w / o% is a role, while% w / o% is a pen ".

As you yourself have shown, the method for drawing an image in a BufferedImage is as follows:

BufferedImage bi = ...;
g.drawImage(bi, px, py, this);

There is also the method to get a Graphics from a Graphics , which is the Graphics ":

Graphics2D g = bi.createGraphics();

Using BufferedImage , you can even access the pixels individually with the

14.01.2017 / 23:42