Offers a description, together with a mathematical and an experimental analysis, of Java and of the Java Virtual Machine (JVM), including a standard compiler of Java programs to JVM code and the security critical bytecode verifier component of the JVM.

1. Introduction.- 1.1 The goals of the book.- 1.2 The contents of the book.- 1.3 Decomposing Java and the JVM.- 1.4 Sources and literature.- 2. Abstract State Machines.- 2.1 ASMs in a nutshell.- 2.2 Mathematical definition of ASMs.- 2.3 Notational conventions.- I. Java.- 3. The imperative core JavaI of Java.- 4. The procedural extension JavaC of JavaI.- 5. The object-oriented extension $${\text{Jav}}{{\text{a}}_\mathcal{O}}$$ of JavaC.- 6. The exception-handling extension Java? of $${\text{Jav}}{{\text{a}}_\mathcal{O}}$$.- 7. The concurrent extension JavaT of Java?.- 8. Java is type safe.- II. Compilation of Java: The Trustful JVM.- 9. The JVMI submachine.- 10. The procedural extension JVMC of JVMI.- 11. The object-oriented extension $${\text{JV}}{{\text{M}}_\mathcal{O}}$$ of JVMC.- 12. The exception-handling extension JVM? of $${\text{JV}}{{\text{M}}_\mathcal{O}}$$.- 13. Executing the JVMN.- 14. Correctness of the compiler.- III. Bytecode Verification: The Secure JVM.- 15. The defensive virtual machine.- 16. Bytecode type assignments.- 17. The diligent virtual machine.- 18. The dynamic virtual machine.- A. Executable Models.- A.1 Overview.- A.2 Java.- A.3 Compiler.- A.4 Java Virtual Machine.- B. Java.- B.1 Rules.- B.2 Arrays.- C. JVM.- C.1 Trustful execution.- C.2 Defensive execution.- C.3 Diligent execution.- C.4 Check functions.- C.5 Successor functions.- C.6 Constraints.- C.7 Arrays.- C.8 Abstract versus real instructions.- D. Compiler.- D.1 Compilation functions.- D.2 maxOpd.- D.3 Arrays.- References.- List of Figures.- List of Tables.

This book provides a high-level description, together with a mathematical and an experimental analysis, of Java and of the Java Virtual Machine (JVM), including a standard compiler of Java programs to JVM code and the security critical bytecode verifier component of the JVM. The description is structured into language layers and machine components. It comes with a natural executable refinement  which can be used for testing code. The method developed for this purpose is based on Abstract State Machines (ASMs) and can be applied to other virtual machines and to other programming languages as well. The book is written for advanced students and for professionals and practitioners in research and development who need for their work a complete and transparent definition and an executable model of the language and of the virtual machine underlying its intended implementation.

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