I'm trying to compile fop-0.20.4rc, but I'm getting an error when the compiler 
get to PDFGraphics2D.java.
I'm using j2sdk1.4.0_01. there is no other jars ( xerces, batik, etc..) 
appearing in my classpath, I'm just using the jars that come with the 
distribution. 
here are my traces. can you give me a hint ? thank you. 
------------------------------------------------------------------------
D:\fop-0.20.4rc>build
Fop Build System
----------------
Building with classpath D:\j2sdk1.4.0_01\lib\tools.jar;D:\j2sdk1.4.0_01
\lib\classes.zip;lib\ant-1.4.1.jar;lib\batik.jar;lib\buildtools.jar;lib\xercesI
mpl-2.0.1.jar;lib\xml-apis.jar;lib\xalan-2.3.1.jar;lib\bsf.jar;lib\jimi-
1.0.jar;lib\avalon-framework-cvs-20020315.jar
Starting Ant...
Buildfile: build.xml

init-avail:

init-filters-xalan2:

init:
     [echo] ------------------- Fop 0.20.4rc [1999-2002] ----------------

prepare:
     [echo] Preparing the build directories

codegen:
     [echo] Resetting codegen directory
     [echo] Generating the java files from xml resources

prepare-jimi:
     [echo] Jimi library is present. Fop installs jimi support.

prepare-jai:

prepare-trax:
     [echo] JAXP1.1 transforms is present. Installing TRaX support

prepare-src:

compile:
     [echo] Compiling the sources
    [javac] Compiling 311 source files to D:\fop-0.20.4rc\build\classes
    [javac] Note: sun.tools.javac.Main has been deprecated.
    [javac] D:\fop-
0.20.4rc\build\src\org\apache\fop\svg\PDFGraphics2D.java:1199: nested class 
org.apache.fop.svg.PDFGraphics2D. PDFGraphicsConfigurat
ion is an abstract class. It can't be instantiated.
    [javac]         return new PDFGraphicsConfiguration();
    [javac]                ^
    [javac] D:\fop-
0.20.4rc\build\src\org\apache\fop\svg\PDFGraphics2D.java:1206: nested class 
org.apache.fop.svg.PDFGraphics2D. PDFGraphicsConfigurat
ion must be declared abstract. It does not define java.awt.image.VolatileImage 
createCompatibleVolatileImage(int, int) from class java.awt.GraphicsCon
figuration.
    [javac]     static class PDFGraphicsConfiguration extends 
GraphicsConfiguration {
    [javac]                  ^
    [javac] 2 errors, 1 warning

BUILD FAILED

D:\fop-0.20.4rc\build.xml:578: Compile failed, messages should have been 
provided.

Total time: 16 seconds
D:\fop-0.20.4rc>