File Checksum (Java) 3.0

File Checksum (Java) 3.0 brings a feature-rich and trustworthy Java 1.4 application to compute common checksums for files: CRC32, MD5, and SHA1. Checksums are small hexadecimal "signatures" for testing whether or not files have been copied correctly, such as over a network. One person sends a file along with the checksum computed on the original computer.

A second person calculates a similar checksum for the received file, and if the two checksums agree, then the received file is assumed to be correct. MD5 is more reliable than and preferred over the older and simpler CRC32. Many web sites provide MD5 signatures for their downloads; use this program to verify files that you download. Please read the PDF documentation included in the ZIP file. This program has been released under the GNU General Public License.