Login | Register   
RSS Feed
Download our iPhone app
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.

Tip of the Day
Language: User Interface Design
Expertise: Beginner
Jul 6, 1998



Application Security Testing: An Integral Part of DevOps

Offscreen buffer

I want to create an offscreen buffer in a Java application, but I don't know how.

You can create an offscreen buffer by using the createImage(int,int) in java.awt.Component. This is most commonly done when subclassing the Canvas class. Let's say you wanted to create a double buffer for the contents of a Canvas.

public class BufferCanvas extends Canvas {
  Image doubleBuffer = null;
  Graphics bufferGraphics = null;
  public void update(Graphics g) { 
    if(bufferGraphics == null) {
        doubleBuffer = createImage(getWidth(), getHeight());
        bufferGrahpics = doubleBuffer.getGraphics();
    // Do your drawing into bufferGraphics, and
    // then display with
    // g.drawImage(doubleBuffer, 0, 0, this);
DevX Pro
Comment and Contribute






(Maximum characters: 1200). You have 1200 characters left.



We have made updates to our Privacy Policy to reflect the implementation of the General Data Protection Regulation.
Thanks for your registration, follow us on our social networks to keep up-to-date