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 primary benefit of GraalVM’s Native Image compilation?
    1. Increased memory footprint
    2. Slower startup time
    3. Platform portability
    4. Limited language support
  2. Which command is used to compile the App class in the GraalVM Native Image creation process?
    1. compile -class App
    2. javac -d build src/main/java/expert/os/App.java
    3. native-image --compile App
    4. graalvm-compile App.java
  3. What is the purpose of the reverseString method in the provided Java application?
    1. Concatenates strings
    2. Reverses a given string
    3. Checks for a palindrome
    4. Removes whitespace from a string
  4. How does GraalVM’s Native Image differ from JVM-based applications in terms of startup time?
    1. Native Image has a slower startup time
    2. Both have similar startup times
    3. Native Image has a faster startup time
    4. JVM-based applications have a faster startup time
  5. What is SDKMan used for in the context of GraalVM installation?
    1. Managing Java versions...