JPegImageEncoder?

só consegui achar isso…

http://java.sun.com/j2se/1.4.2/docs/guide/2d/api-jpeg/com/sun/image/codec/jpeg/JPEGImageEncoder.html

Note that the classes in the com.sun.image.codec.jpeg package are not part of the core Java APIs. They are a part of Sun’s JDK and JRE distributions. Although other licensees may choose to distribute these classes, developers cannot depend on their availability in non-Sun implementations. We expect that equivalent functionality will eventually be available in a core API or standard extension.