Hosted at Sourceforge: http://sourceforge.net/projects/javatools/.
Written by Chris Bitmead.
Javadoc is found here Javadoc.
USE THE VERSION IN CVS FOR REAL DEVELOPMENT, BECAUSE OFFICIAL RELEASES ARE MADE RARELY, AND THE CVS VERSION IS THE MOST STABLE
JavaTools is a grab bag of lots of Java code that
I've personally found useful. Most of the code is
well written and some is quite extensively documented
with javadoc. However, there does still need more doco written.
The source is released as a .tgz file (gzipped tar). On Windows, this
can be extracted using WinZip.
The javadoc is online here. Many
packages have a javadoc package summary so be sure to click on the
The highlights include:
Database Interface Classes
These classes are designed to provide a nicer, higher level
interface to the database than than provided by raw JDBC.
This much more fun than JDBC! It especially makes it
easier to make dynamically generated queries.
The design is somewhat modeled on the
Rogue Wave Source Pro DB C++ class library (formally known
as DBTools.h++). If you are
left wondering "why is it so", reading the online
Rogue-Wave Source Pro DB docs may provide philosophical
This is an implementation of Unix Cron written in Java.
This implementation distinguishes itself from some others in the
It doesn't wake up every minute when there is nothing to do. It
sleeps until the next event is scheduled to occur, no more no less.
Because of (1) scheduling can be done at millisecond
resolution. There is an optional extended file format that supports
milliseconds, seconds and years.
While the package contains an implementation of Unix style
crontabs, the Cron class itself doesn't care if it is a class which
schedules according to Unix style events, or the phases of the moon or
the movements of the planets or whatever. Cron only wants to know (a)
when is the next event and (b) what to do when that event occurs.
This allows custom event generators.
Supports text names like MON,TUE,WED and JAN,FEB,MAR etc.
Extended formating. e.g. JAN-JUN/2,DEC is valid syntax.
A reverse parser. i.e. It can convert from a bitmap of
events into a quite optimised string representation. This is
very useful for certain styles of Gui editor implementations.
The beginnings of a Java Swing gui and an applet that can edit
Crontab Entries both graphically and with Unix style syntax.
It is unnecessary for your task to inherit a special class. At
present I support two types of objects: Calling a static main() method
in a class, and calling a class that implements java.lang.Runnable,
while passing the arguments to the constructor. Optionally your class
may implement another interface "Server" in which case it can
I make it easy to do something custom when an event happens if
that's what you want. e.g. you may want to instead start processes or
take some other action when a Cron event occurs.
Designed to make it easy to store your crontabs in strange places.
e.g. I need to store mine in an SQL database with single fields
for each time interval.
A couple of small servlet base classes that make it nice when working
with the db classes. In particular committing and rolling back as
If you attach this class to your own class it allows you to call your
methods via a http socket. e.g. write a method Foo.bar(HttpWriter w)
and you can telnet to a port, enter "GET /bar" and it will execute
that method. Great for conveniently controlling servers remotely with
a web browser.
Makes it convenient to compile java code from within a Java app.
The possibilities of dynamically compiled and loaded classes are
Logging classes and Assertion class
Yet another file logging class. Nothing special, but it does
provide multiple levels of logging, configurable with a