Nullpointer exception with getGraphics() in an custom Canvas

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#7998

From: Mark Bakker
Date: Tue, 08 May 2001 14:20

26 lines
1694 bytes

Hello all,

I have created an custom Canvas,

public class textscoll extends Canvas implements Runnable{
.....
}

Now I have the following code in the canvas:

public void makeText()
    {
    myFontMetrics = getFontMetrics(myFont);
    textwidth = myFontMetrics.stringWidth(myText);
    textheight = myFontMetrics.getAscent();
    myTextImage = createImage(textwidth,textheight);
    myTextGraphics = myTextImage.getGraphics();
    }

When I use this code I get an NullPointer Exception. It has something to do
with getGraphics() I think.
But can someone tell me how to fix this?

Kind regards,

Mark Bakker

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From: "Mark Bakker" <mark@atlast.nl>
Newsgroups: borland.public.jbuilder.java.language
Subject: Nullpointer exception with getGraphics() in an custom Canvas
Date: Tue, 8 May 2001 16:20:51 +0200
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