$ java Checksum -h usage: Checksum [-h] [-t {SHA-256,SHA-512,SHA1}] [file [file ...]]
Calculate checksum of given files.
positional arguments: file File to calculate checksum
optional arguments: -h, --help show this help message and exit -t {SHA-256,SHA-512,SHA1}, --type {SHA-256,SHA-512,SHA1} Specify hash function to use (default: SHA-256)
$ java Checksum file1.cc file1.h
6bd85bf4b936bc8870c70bea04cd12d4fe3745934f511e6e188d718d32154a79 file1.cc 839ef370cbd54f62985bac7b974cc575eaaa24a8edd6ae7787cfc71829ceda40 file1.h
$ java Checksum -t SHA1 file1.cc
20bada64dde97b98faaba09ebbfdb70af71476f1 Checksum.class