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

Questions

Answer the following questions to test your knowledge of this chapter:

  1. What is the purpose of the “Magic” number in the Java class file header?
    1. It identifies the developer who wrote the code
    2. It identifies the file as being a Java class file
    3. It marks the end of the constant pool
    4. It determines the class hierarchy
  2. Which section of the class file structure stores symbolic references, strings, and constants?
    1. Fields
    2. Access flags
    3. Constant pool
    4. Methods
  3. What does the interfaces_count field in the class file structure represent?
    1. The number of methods in the class
    2. The number of interfaces implemented by the class
    3. The access flags for interfaces
    4. The total size of the constant pool
  4. What do fields and methods represent in the context of class files?
    1. Variables and attributes
    2. Linguistic repositories
    3. Cryptographic seals
    4. Access modifiers
  5. What is the primary purpose of the attributes section in the class file structure?
    1. Determines the class version
    2. Stores symbolic references...