Pack200
Encyclopedia
Pack200, specified in JSR 200, is an HTTP compression
method by Sun
for faster JAR
file transfer speeds over the network. Pack200 may also refer to the Pack200 compression tools provided in Sun's JDK since 1.5.0, as well as the Pack200 compressed files.
In HTTP compression, Pack200 is used in tandem with GZIP
compression (referred to as "pack200-gzip") to provide a superior compression rate over GZIP only. Pack200 is optimized for compressing JAR archive files, specifically the Java bytecode
portion of the JAR file. Application of this technology includes Java application deployment over Java Web Start
.
Http compression
HTTP compression is a capability that can be built into web servers and web clients to make better use of available bandwidth , and provide faster transmission speeds between both...
method by Sun
Sun Microsystems
Sun Microsystems, Inc. was a company that sold :computers, computer components, :computer software, and :information technology services. Sun was founded on February 24, 1982...
for faster JAR
JAR (file format)
In software, JAR is an archive file format typically used to aggregate many Java class files and associated metadata and resources into one file to distribute application software or libraries on the Java platform.JAR files are built on the ZIP file format and have the .jar file extension...
file transfer speeds over the network. Pack200 may also refer to the Pack200 compression tools provided in Sun's JDK since 1.5.0, as well as the Pack200 compressed files.
In HTTP compression, Pack200 is used in tandem with GZIP
Gzip
Gzip is any of several software applications used for file compression and decompression. The term usually refers to the GNU Project's implementation, "gzip" standing for GNU zip. It is based on the DEFLATE algorithm, which is a combination of Lempel-Ziv and Huffman coding...
compression (referred to as "pack200-gzip") to provide a superior compression rate over GZIP only. Pack200 is optimized for compressing JAR archive files, specifically the Java bytecode
Java bytecode
Java bytecode is the form of instructions that the Java virtual machine executes. Each bytecode opcode is one byte in length, although some require parameters, resulting in some multi-byte instructions. Not all of the possible 256 opcodes are used. 51 are reserved for future use...
portion of the JAR file. Application of this technology includes Java application deployment over Java Web Start
Java Web Start
In computing, Java Web Start is a framework developed by Sun Microsystems that allows users to start application software for the Java Platform directly from the Internet using a web browser....
.