ICEpdf v6.0.1 是个维护版本，ICEpdf 是一个轻量级的开源 Java 语言的 PDF 类库。通过 ICEpdf 可以用来浏览、内容提取和转换 PDF 文档，而无须一些本地PDF库的支持。
值得关注的改进：
Rendering Core
Improved CCITTFax image processing.
Graphics clipping optimization significantly speeds up page painting.
Added support for decode for 1, 2 and 4 bit JBIG2 images.
Improved parsing of PDF destination data.
Fix several problems with parsing inline images.
Addition of scaled tile painting for improve quality at varying zoom values.
Numerous image handling improvements.
Fixed a bug which was causing annotations without content streams from being painted.
Addressed a OFont advance caching issue which caused some glyphs to be incorrectly painted.
Added parser support for inline font dictionaries.
Viewer RI
Fixed an issue where the default fill colors for square and circle annotation tools were not being respected.
General reminder that Form Widgets have configurable parameter on the Document class and a new button to show/hide a background color. The highlight when enabled can help users find form elements on a page.
Fixed an issue where some xobject text could not be selected.
Build and Bundle
Maven dependencies for the icepdf-viewer.jar have been updated to correctly point the os icepdf-core jar.
Levigo jbig2 library found in the PRO bundles has been updated to version 1.6.4.
Font Engine
Fixed a regression in the FontManger which was creating an empty font list if the the FontProperties manager wasn't initialized first.
Implementation of getStyle() method was added to the font engine.
Fixed multi byte encoding issue with some CID fonts which was preventing some PDF text from rendering correctly.
完整改进请看 JIRA Change Log。