java.util.zip
Interfaces 
Checksum
Classes 
Adler32
CheckedInputStream
CheckedOutputStream
CRC32
Deflater
DeflaterInputStream
DeflaterOutputStream
GZIPInputStream
GZIPOutputStream
Inflater
InflaterInputStream
InflaterOutputStream
ZipEntry
ZipFile
ZipInputStream
ZipOutputStream
Exceptions 
DataFormatException
ZipException
Errors 
ZipError