The semantics of Java multithreading dictates all possible behaviors that a multithreaded Java program can exhibit on any platform. This is called the Java memory model and describes the allowed re-orderings among the operations in a thread. However, multiprocessor platforms traditionally have a memory consistency model of their own. Consequently memory barriers may have to be inserted to ensur...

The Java Grande Forum aims to drive improvements to the Java language and its standard libraries in order that Java may be efficiently used for large-scale scientific 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...

The ESC/Java tool was a lauded advance in effective static checking of realistic Java programs, but has become out-of-date with respect to Java and the Java Modeling Language (JML). The ESC/Java2 project, whose progress is described in this paper, builds on the final release of ESC/Java from DEC/SRC in several ways. It parses all of JML, thus can be used with the growing body of JML-annotated J...

In this paper we present JTN2 (Java Targeted Notation 2) a notation for component-based design of Java applications. JTN2 defines a component model based on the fundamental object-oriented principles: abstraction, encapsulation, modularization and typing. Indeed, JTN2 is an extension of JTN, an object-oriented, formal, visual notation for designing concurrent Java applications. JTN2 component m...

ion and Verification of Properties of a Real-Time Java Nadezhda Baklanova and Martin Strecker IRIT (Institut de Recherche en Informatique de Toulouse) Université de Toulouse 118 route de Narbonne, F-31062 Toulouse CEDEX 9, France [email protected], [email protected] Abstract. We present a tool for analysing resource sharing conflicts in multithreaded Java programs. Java programs ...

When Java(TM) was first introduced, there was a perception (properly founded at the time) that its many benefits came at a significant performance cost. In few areas were the performance deficiencies of Java so blatant as in numerical computing. Our own measurements, with second-generation Java virtual machines, showed differences in performance of up to one hundred-fold relative to C or Fortra...

Wildcards are a complex and subtle part of the Java type system, present since version 5.0. Although there have been various formalisations and partial type soundness results concerning wildcards, to the best of our knowledge, no system that includes all the key aspects of Java wildcards has been proven type sound. This paper establishes that Java wildcards are type sound. We describe a new for...

Spi Calculus is an untyped high level modeling language for security protocols, used for formal protocols specification and verification. In this paper, a type system for the Spi Calculus and a translation function are formally defined, in order to formalize the refinement of a Spi Calculus specification into a Java implementation. Since the generated Java implementation uses a custom Java libr...

This paper presents a new approach to improve performance of Java programs by extending the superthreaded speculative execution model [14, 15] to exploit coarsegrained parallelism on a shared-memory multiprocessor system. The parallelization model, called Java Speculative MultiThreading (JavaSpMT), combines control speculation with run-time dependence checking to parallelize a wide variety of l...

Information technology sees references to the Java programming language with increasing frequency. It is a rare day when even casual computer users do not see Java mentioned in the media or on the many web pages they access. Mainstream news sources like The New York Times and The Wall Street Journal have been carrying substantial articles about Java.[5] The excitement that JAVA has produced has...