bzip2
· bzip2 is a freely available, patent free, high-quality data compressor. It typically
compresses files to within 10% to 15% of the best available techniques (the PPM family of statistical
compressors), whilst being around twice as fast at compression and six times faster at decompression.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window libbz2-4.0.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.