The standard PDFTextStream for Java download contains two JAR files in the lib directory. One, named PDFTextStream-2.x.jar, is the larger of the two; it includes everything.
If you need a smaller JAR file, and do not need to extract Chinese, Japanese, or Korean (CJK) text, you can use the second one in the lib directory, named PDFTextStream-2.x-NOCJK.jar. This JAR file does not include the character encodings needed for extracting CJK text, which shaves the file size down by over 2.5MB.