Interfaces and Implementations of Random Number Generators for JAVA Grande Appllications

The Java Grande Forum aims to drive improvements to the Java language and its standard libraries in order that Java may be eeciently used for large-scale scientiic applications, particularly on high-performance computers. Random number generators are one of the most commonly used numerical library functions in applications of this kind. For the current random number generator provided within Java, neither the implementation nor the interfaces are adequate to meet the needs of some Java Grande applications, such as Monte Carlo simulations. We present a preliminary proposal for an API for accessing a random number generator within a Java scientiic software library for supporting Java Grande applications. A reference implementation of the proposed API is described, and we discuss some implementation and performance issues. Mechanisms for eeciently handling concurrency are also discussed.