Pattern: Singleton

Ensure that only one instance of a class is created. All objects that use an instance of that class use the same instance.

Links:

• Global Variables In Java with the Singleton Pattern This pattern can help C++ coders make the transition to Java.
• Implementing the Singleton Pattern in Java
• Singletons vs. Class (un)loading Find out how Java 1.2 changes the way we load and unload classes in Java