Javagony (Java + Agony) is an Object-Oriented Esoteric Programming language or a programming challenge using the Java programming language. You can use any Java IDE, but notice that the following statements are NOT allowed:

for (){}
if (){} //including else and else if
while (){}
do {} while ();
switch(){}
?:

The purpose of this book is to teach how to write code that does regular Java stuff despite the restrictions.