CODEWITHSUNDEEP
javaswing
pasghetti
pasghetti

Reputation: 57

Swing - stop image from blinking

I have been practicing with java's swing features recently, and in one of my classes that extends the class JPanel, I have overriden the method paintComponent() so that it will paint my BufferedImage onto the JPanel. I also have a method on it to move around. Before this issue, I have had a problem that shows the process of moving as it repaints too quickly. So, I created a boolean variable called available which is set to false when the image is still in the moving process. But, now I see that the screen is taking away the entire image and putting it back, causing it to blink. Here is my basic pseudocode:

class A extends JPanel{
    BufferedImage canvas;
    public A(){
        //create image here
    }
    public move(){
        available = false;
        //move things around in here
        available = true;
    }
    @Override
    protected void paintComponent(Graphics g){
        super.paintComponent(g);
        if(available){
            g.drawImage(this.canvas, 0, 0, null);
        }
        g.dispose();
    }
}
class B{
    public static void main(String[] args){
        //construct the class A JPanel
        while(some_variable){
            class_A_JPanel.repaint();
        }
    }
}

Upvotes: 2

Views: 110

Answers (1)

Izold Tytykalo
Izold Tytykalo

Reputation: 719

This is very old topic which is fixed in modern Java. But you prefer old way then use old techniques. For example Double Buffering

Upvotes: 1

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