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Java Bytecode

April 8, 2020April 8, 2020 Krishna 80x86 instructions, A Bytecode Example, Bytecode Table, Bytecode type, Java bytecode, JVM, Object-oriented vs non-object-oriented, PointlessButton class, Prefix, prefixes, stack-based architecture, Stack-based architecture vs register-based architecture, Type Prefixes for Bytecode, Type Safety

A Bytecode Example Though you may not realize it, you have already seen an example of bytecode or at least

The Constant Pool

April 8, 2020 Krishna Beating the Decompilation Threat, class, Constant Pool Entry Types, Java, Java 2 Network Security, Java 2 SDK, Java source code, javac, javap Command, JIT compilers, JVM, PointlessButton, The Constant Pool, UTF8

We said that the constant pool contains a great deal of information. In fact it contains an interesting mixture of

The Java 2 Class File Format

April 8, 2020 Krishna assembler language, Class File Contents, Decompilation Attacks, decompiler, Entertainment, hexadecimal number, Java 2 Network Security, Java 2 SDK, Java Development Kit, JVM, Migration of applications, Modern compilers, The Java 2 Class File Format

The class file contains a lot more information than its cousin, the executable file. Of course, it still contains the

The Java Development Life Cycle

April 8, 2020April 8, 2020 Krishna C#, Class Files in Java 2, COBOL, Compiler Models, Count.class file, Disassembled Count.class File, JAR files, Java 2 Network Security, Java compiler, JVM, low-level machine language, Native Compiler, NetREXX, The Java Development Life Cycle

Moving back to the world of Java, we see that it is a high-level programming language and that bytecode is

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Java 2 Class Loading Mechanism

March 30, 2020 Krishna code source, HTTP-based URLs, Java 2 Class Loading Mechanism, Java 2 Network Security, Java programs, Java security, JVM, Run-Time Access Controls, SecureClassLoader, SecurityManager, Web browser

The class loading mechanism plays a critical role in Java security since the class loader is responsible for locating and

Java Javascript Tutorial Tutorial

Java 2 Protection Domain and Permissions Model

March 25, 2020March 25, 2020 Krishna Java 2 Network Security, Java 2 Protection Domain and Permissions Model, Java 2 security model, JVM, Mapping in the Java Application Environment, protection domain, System Domain, The Java application environment

A protection domain can be scoped by a set of objects that are currently directly accessible by a principal, where

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The New Java Security Model

March 24, 2020 Krishna Class File Verifier, Class Loader, digital signatures, encryption, Java 2 SDK, Java applet sandbox, Java classes, Java Virtual Machine, Java-based network computers, JDK 1.0, JDK 1.1, JVM, manipulate threads, risks, run-time environment, Security manager, security mechanisms, Standard Edition, The New Java Security Model, V1.2

The Need for Java Security From its inception, Java has shown that it was designed for the net. Java brought

Components of Java

March 16, 2020 Krishna Components of Java, Development environment, Execution environment, graphical user interfaces, Interfaces and architectures, Java, Java 2 SDK, Java applications, Java Cryptography Architecture, Java platform, Java Runtime Environment, Java Virtual Machine, JVM

There are a number of different components to Java: 1. Development environment The Java 2 SDK contains the tools and