[4229] in java-interest
Garbage Collection Poss Prob
daemon@ATHENA.MIT.EDU (Greg Gentling)
Wed Dec 13 23:35:26 1995
Date: Wed, 13 Dec 95 17:01:17 PST
From: "Greg Gentling" <GGentling@symantec.com>
To: java-interest@java.sun.com
Hey I ran into a little problem with offscreen images. In my update I create an
offscreen draw into it than draw onto the Graphics context. I noticed in Win95
that the create was not being disposed of. The darn thing just keeps eating the
resources up on every update. Here is the code frag below.
What I ended up doing is moving the create offscreen calls outside the update,
and that works, but everytime the applet gets initialized the GDI goes down
another notch. I understand that after leaving the method shouldn't Java do the
clean-up? I noticed a dispose & finalize method's but to no avail that didn't
work either.... Bug maybe? or am I doing something wrong.
...Greg
public void update(Graphics g) {
if ((size().height != lastS.height) || (size().width != lastS.width)) {
createParams(); }
Image myImage = createImage(lastS.width, lastS.height);
Graphics offScreen = myImage.getGraphics();
offScreen.setColor(bgCo);
offScreen.fillRect(0,0,lastS.width-1,lastS.height-1);
offScreen.setColor(bgCo);
offScreen.draw3DRect(2,2,lastS.width-5, lastS.height-5, true);
offScreen.draw3DRect(3,3,lastS.width-7, lastS.height-7, true);
offScreen.clipRect(5,4,lastS.width-10, lastS.height-8);
offScreen..setColor(txtCo);
offScreen.setFont(messageF);
offScreen.drawString(message, messageX, messageY);
g.drawImage(myImage,0,0,this);
// tried this
offScreen.dispose();
}
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