Advanced Java 9

This course provides an in-depth treatment of the many, significant Java 9 features and updates with the goal of demonstrating how these features can be used to improve the performance and functionality of Java applications.

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Learning Objectives

Students who attend this course will leave armed with new skills to leverage Modules, scale applications into multi-core environments and improve the performance of Java 9 applications. This course will teach students everything they need to successfully master and implement the latest features and benefits of Java 9 and become a more effective Java 9 developer.

 

Course Details

Course Outline

1 - Review of What is New in Java 9
  • Overview of 'smaller' Java 9 topics
  • Java versioning
  • The JDK/JRE file structure
  • Deprecation
  • The jdeprscan tool
  • Multi-Release JAR Files
  • HTML 5 compliant JavaDoc
  • Exercise: Creating a MRJar
  • 2 - Milling Project Coin
  • Changes made to the language since Java 6
  • Multi-catch
  • Using effectively final variables in try-with-resources
  • Suppressed Exceptions
  • Binary literals
  • Reserved underscore (Java 9)
  • Type inference in anonymous classes (Java 9)
  • @SafeVargs (updates in Java 9)
  • Default and static methods in interfaces (Java 8)
  • Private methods in interfaces (Java 9)
  • Exercise: Try-With-Resources
  • 3 - Why JigSaw?
  • Problems with Classpath
  • Encapsulation and the public access modifier
  • Application memory footprint
  • Java 8’s compact profile
  • Using internal JDK APIs
  • 4 - Introduction to the Module System
  • Introduce Project Jigsaw
  • Classpath and Encapsulation
  • The JDK internal APIs
  • Java 9 Platform modules
  • Defining application modules
  • Define module dependencies
  • Implicit dependencies
  • Implied Readability
  • Exporting packages
  • Exercise: Defining Modules
  • 5 - The Module Descriptor
  • Define module requirements
  • Explain qualified exports
  • Open modules for reflection
  • Use ServiceLoader
  • The provides and uses keywords
  • Exercise: Modules and the ServiceLoader
  • Exercise: Using Reflection on modules
  • 6 - Working with Modules
  • Being backwards compatible
  • The ModulePath and ClassPath
  • Unnamed Modules
  • Automatic Modules
  • The JLink tool
  • Exercise: Migrating to modules
  • 7 - JShell
  • Introduction to JShell
  • Running Expressions in JShell
  • Importing packages
  • Defining methods and types
  • Using the JShell editor
  • Save and loading state
  • Exercise: Working with JShell
  • 8 - Other New Java 9 Features
  • Enhancements on the Optional class
  • Improvements made in the Process API
  • The Stack-Walking API
  • The HTTP2 Client
  • The Multi-Resolution API
  • Exercise: Working with Native processes
  • Exercise: HTTP Clients
  • 9 - Performance Optimizations
  • Performance in Java 9
  • Compact Strings
  • String deduplication
  • Ahead-Of-Time Compilation
  • Hotspot Diagnostic commands
  • The G1 Garbage collector
  • Variable and Method Handles
  • 10 - Multithreading
  • Principles of Multithreading
  • Creating a Threaded Class
  • Basic Features of the Thread Class
  • Thread Scheduling
  • Thread Synchronization
  • Exercise: Simple Thread Class
  • Exercise: Simple Runnable Class
  • 11 - Concurrent Java
  • Concurrent Locks are Explicit and Flexible
  • Executor Interfaces Provide Thread Management
  • Challenges for Concurrent Use of Collections
  • Concurrent Collections
  • Atomic Variables Avoid Synchronization
  • Exercise: Working with Concurrent Java
  • Exercise: Sleeping Threads
  • Exercise: Safe Data Access
  • Exercise: Producer/Consumer
  • 12 - Java 8 Concurrency Updates
  • The common thread pool
  • Atomic variables
  • LongAdder and LongAccumulator
  • CompletableFuture
  • Non-blocking asynchronous tasks
  • Exercise: CompletableFuture
  • 13 - Introspection and Reflection
  • Reflection classes
  • Introspection
  • Dynamic invocation of methods
  • Using annotations
  • Type annotations
  • Receiver parameter
  • Exercise: Introspection and Reflection
  • Exercise: Reflection Server
  • 14 - Reference Objects
  • List the kinds of object references available in Java
  • Introduce Weak, Soft and PhantomReference
  • Explain the ReferenceQueue
  • 15 - Objects, Declarations, and Initializations
  • Abstraction and Responsibilities
  • Low Coupling
  • Programming principles
  • Inheritance
  • 16 - Exceptions
  • Proper use of Exceptions
  • Managing state in exceptional situations
  • Checked vs. Unchecked Exceptions
  • 17 - Profiling and Benchmarking
  • List and describe the two types of benchmarks
  • Describe the criteria that should be considered when constructing a benchmark plan
  • Name the three most useful targets for profiling
  • List four common tools/techniques for profiling
  • Describe two strategies for improving performance as a result of profiling data
  • List and explain the five most common problem areas for good performance with Java
  • 18 - Profiling Tools
  • Use the JDK to collect runtime profiling data
  • Successfully read the profiling data generated by the JDK to detect performance bottlenecks
  • Instrument your own code to collect method execution time data
  • Exercise: Using the JVM Profiling Tools and Visual VM
  • 19 - Code Optimization Techniques
  • List three potential problems with strings
  • List two ways to optimize loops
  • Describe the advantages of private and final methods
  • List two advantages of collections over vectors and hashtables
  • List 4 other code and system optimizations
  • Exercise: Code Optimizations
  • 20 - Code Optimization Myths
  • Debunk several myths of Java performance tuning
  • Synchronization trade-offs
  • Setting methods to be final
  • String is not always bad
  • Revisit the fundamentals of Java code performance
  • How to detect a performance myth
  • 21 - Design Optimization Techniques
  • List five ways to optimize Java program design
  • Exercise: Design Optimizations
  • Actual course outline may vary depending on offering center. Contact your sales representative for more information.

    Who is it For?

    Target Audience

    Programmers with prior Java 8 or 9 programming experience

    Advanced Java 9

    $2,796
    Course Length : 4 Days (32 Hours)
     

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