my dog learned polymorphism
The moose likes Beginning Java and the fly likes draw rect problem? Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Beginning Java
Reply locked New topic

draw rect problem?

nick cheng

Joined: Oct 31, 2004
Posts: 11
public void paint(Graphics g) {
if (!buffered){
buffer = createImage(50, 50);


bufferG.drawRect(0, 0, (int) imageSize.getWidth(),
(int) imageSize.getHeight());

in this Applet file ,i set the background colour is "black" in void init()
,then i set some images one the surface,and last i use double buffer draw a rect image,but when i draw the image,the rect become ,a black solid rect ,how to make it become tranparent?
Nigel Browne
Ranch Hand

Joined: May 15, 2001
Posts: 673
You should be using the Graphics2D class and the AlphaComposite class. See this Tutorial
Ernest Friedman-Hill
author and iconoclast

Joined: Jul 08, 2003
Posts: 24195

Don't post the same question to more than one forum -- it just wastes people's time and makes them less likely to help you. I'm closing this and leaving the one in the correct forum -- the Swing/AWT copy -- open. I've taken the liberty of deleting the other copies for you.

[Jess in Action][AskingGoodQuestions]
I agree. Here's the link:
subject: draw rect problem?
It's not a secret anymore!