The Java Platform provides support for this capability in the form of reference queues: instances of the java.lang.ref.ReferenceQueue class.

Now what about EJS: **What is Easy Java Simulations (EJS)** EJS is itself a Java program. It creates an environment where the user can create java simulations (easily). Here are some of the features: ...

JUnit and NUnit are open source unit testing frameworks; the former for Java applications, the latter for .Net programs. JUnit is a descendant of SUnit, a Smalltalk creation and great-grandaddy of ...