Method for get n random number's

A simple tool used for fast Exponentiation. Very useful if you are creating your own cryptograpgic methods.

Convert
java.awt.Canvas to java.awt.image.BufferedImage or java.awt.image.Image

This is a quick and easy class that will generate MD5 hashes from strings. I originally wrote it to insert into my Oracle database so I could generate MD5 hases for passwords from PL/SQL.

Example

String md5Hash = stringMD5("my password");

Date Parse

Another way to generate a unique ID.

Weighted random selection from the list.

Don't forget to call itemsChanged after updating list content.

This class uses reflection to locate option setters. Client class must contains methods setFile (to receive file names from the command line) and setOption### (to receive option ###).

(See also adapter-based implementation)

Implementation-independent XML builder.

A handy class I use all the time to encapsulate the idea of whether two events coincide. For example, given a time period representing a shift, and a list of time periods representing transactions or sessions or whatever, find which ones are either totally or partially within the time period. This class make it a bit easier.