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Free command line utility for file multi-checksum generation and verification. It allows to create/verify popular file hashes/checksums: MD2, MD4, MD5, SHA-1, SHA-2(256,384,512), RIPEMD-160, PANAMA, TIGER, CRC-32, ADLER32, and the message digest used in eMule/eDonkey (ed2k) software. Its most common use is checking files for corruption (data integrity checking). A hash/checksum calculation might be performed on data before transferring (downloading/uploading) it from one location to another. Making the same calculation after the transfer (download/upload) and comparing the former and latter results, you can check if the received data is corrupted or not. FSUM notifies about any bad, incorrect, missing file. It is a very fast, easy to use tool. Allows to recurse directories. Works with large size files. Supports .MD5 and .SFV file formats (automatically recognizes the format when verifying). Compatible with md5sum, MD5Summer, Easy MD5 Creator, SFV Checker/Verifier, WinSFV, Win CRC32.

Java classes to include in your programs. Includes:
HTMLArrayComparator.java: Compares two arrays of Strings of HTML, ignoring embedded tags.
HTMLComparator.java: Compares two Strings of HTML, ignoring embedded tags.
StringComparator.java: Compares two Strings, case sensitive.
StringComparatorIgnoreCase.java: Compares two Strings, case insensitive.

Not useful on its own, though you can run the debugging harness with:

java com.mindprod.comparators.Comparators

Why the orange slice logo? Comparing apples and oranges,
though Comparators are primarily for comparing Objects of
the same class.

This is a pair of library classes to include in your own
code for manipulating ArrayLists.

It consist of two classes: SortedArrayList and Merge.

SortedArrayList is an ArrayList that remembers how it is
sorted, so that if you ask it to sort, it can sometimes
bypass the work when it is already in order. You declare the
order you want and it keeps the list sorted, You just call
sort whenever you need the list to be in perfect order. It
may or may not actually sort the list at that time. It
automatically avoids physically sorting when it does not
really have to.

Merge lets you merge/prune two SortedArrayLists in any of 32
different ways, e.g. union, intersection, update... It also
lets you dedup and prune individual SortedArrayLists.

They are used extensively as part the replicatorsender
package. Having an look at that code may give you a more
realistic view of what they can do.

To use them, have a look at the source code and the sample
drivers. They don't do anything useful standalone. You must
incorporate them into your own code.

Why the spectrum icon? It represent the colours of light
sorted in order by wavelength.