Book Image

Mastering the Java Virtual Machine

By : Otavio Santana
Book Image

Mastering the Java Virtual Machine

By: Otavio Santana

Overview of this book

Mastering the Java Virtual Machine is a comprehensive guide that will take you into the heart of Java programming, guiding you through the intricate workings of the Java Virtual Machine (JVM) and equipping you with essential skills to become a proficient Java developer. You’ll start by understanding the JVM, exploring its architecture and how it executes Java code. Through detailed explanations and real-world examples, you’ll gain a deep understanding of JVM internals, enabling you to write efficient and optimized Java applications. As you progress, you’ll delve into memory management and execution, unraveling the complexities of heap and stack management, garbage collection, and memory profiling. You'll learn how memory is allocated and reclaimed in the JVM, as well as how to optimize memory usage and identify performance bottlenecks in your applications. With this knowledge, you’ll be able to create Java programs that are not only robust but also highly performant. By the end of this book, you’ll have the skills needed to excel in Java programming, writing efficient, maintainable code.
Table of Contents (19 chapters)
Free Chapter
1
Part 1: Understanding the JVM
5
Part 2: Memory Management and Execution
9
Part 3: Alternative JVMs
12
Part 4: Advanced Java Topics

System operation layers

System operation layers constitute the fundamental architecture that underpins the seamless functionality of modern computing. These layers are hierarchical strata, each serving a distinct purpose in orchestrating the collaboration between hardware and software. Let’s unravel the significance of these layers and understand why they are crucial to the operation of a computer system:

  • Hardware layer: At the lowest level, the hardware layer consists of the physical components of a computer system—processors, memory, storage devices, and input/output devices. It provides the foundation upon which all higher-level operations and software function.
  • ISA layer: Above the hardware layer lies the ISA layer, defining the interface between software and the hardware. It includes the instruction set and the architecture, which the processor understands. The ISA layer acts as a bridge, allowing software to communicate with and utilize underlying hardware...