Micro-experimentation Tools in Java 9 from Pluralsight

This course covers Java 9 tools JShell and JMH, designed to restore a Java engineer's flow by making it easy to explore your code base, experiment with solutions at a small scale, and roll the results into long-lasting applications with confidence.

Historically, Java engineers have been loathe to do small scale experiments during their coding because of the high ceremony of the Java language. There is so much overhead when all an engineer wants to write is a little one-line experiment that its often avoided. At the core, the JVM is so good at code optimization that experiments in the performance family are still more time consuming because of the immense number of false positives and noisy evidence that result. In this course, Micro-experimentation Tools in Java 9, you'll learn how to use JShell and JMH. First, you'll learn how to do more in-depth experimenting. Next, you’ll discover more about exploratory coding. Finally, you’ll explore how to find if your feedback loop is too slow for significant processes. When you’re finished with this course, you'll have a foundational knowledge of JShell and JMH that will help you as you move forward in restoring flow while using Java 9 micro-experimentation tools.

What's inside

Syllabus

Course Overview

How Noisy Experiments Are Wasting Your Precious Make Time

Getting Quick Feedback from Command-line JShell

Prototyping with JShell Scripts

Microbenchmarking Using JMH

Folding JMH into Continuous Integration

Good to know

Know what's good

, what to watch for

, and possible dealbreakers

Delves into Java 9 tools, catering to Java engineers seeking efficient experimentation and application building

Provides practical guidance on utilizing JShell and JMH for code exploration and performance optimization

Designed for Java engineers with some experience seeking to enhance their coding workflow

Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in Micro-experimentation Tools in Java 9 with these activities:

Review Java Basics

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Review Java basics, including syntax, data types, and control flow, to refresh your memory and prepare you for the course.

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Go through online tutorials or documentation on Java basics.
Solve simple Java coding problems on platforms like LeetCode or HackerRank.
Create a small Java program that implements basic concepts like variables, loops, and conditional statements.

Review JShell and JMH Tutorials

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Reviewing these tutorials will help you refresh your memory and fill in any gaps in your understanding of JShell and JMH, so that you can follow the course more effectively.

Browse courses on JShell

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Read the JShell Tutorial
Read the JMH Tutorial

Follow a JShell or JMH Tutorial Series

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Following a tutorial series will provide you with a structured and comprehensive learning experience, and help you master the fundamentals of JShell and JMH.

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Find a JShell or JMH tutorial series
Follow the tutorials step-by-step

Eight other activities

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Explore JShell

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Follow guided tutorials on JShell to learn how to use its features for interactive coding, experimentation, and quick prototyping.

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Find online tutorials or documentation on using JShell.
Practice using JShell commands to evaluate expressions, define variables, and execute code snippets.

Try Out JShell and JMH Features

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Experimenting with JShell and JMH features will help you gain hands-on experience and a deeper understanding of how these tools work.

Browse courses on JShell

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Try out the JShell REPL
Create a JMH benchmark

Volunteer on an Open Source JShell or JMH Project

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Participating in an open-source project is a great way to gain practical experience with JShell and JMH, while also contributing to the community.

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Start contributing to the project
Find an open-source JShell or JMH project
Contact the project maintainers

Benchmarking with JMH

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Complete practice drills and exercises on JMH to gain proficiency in performance benchmarking, profiling, and analyzing results.

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Set up JMH in your Java project.
Create benchmark tests for different code snippets.
Run benchmarks and analyze the results to identify performance bottlenecks.
Use JMH annotations and options to customize your benchmarks.

Write a JShell Script

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Create a JShell script to automate a complex or repetitive task in your Java codebase, reinforcing your understanding of JShell's capabilities.

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Identify a task that can be automated with JShell.
Write a JShell script to perform the task.
Test and refine your script to ensure it works correctly.

Write a Blog Post or Article on JShell or JMH

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Writing a blog post or article will help you consolidate your understanding of JShell and JMH, and share your knowledge with others.

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Choose a topic
Research the topic
Write the blog post or article
Publish the blog post or article

Mentor Junior Developers on JShell or JMH

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Mentoring others is an effective way to reinforce your own understanding of JShell and JMH, and help others grow in their careers.

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Find a junior developer
Set up regular mentoring sessions
Cover key JShell and JMH concepts with them.

Develop a Java Application Using JShell and JMH

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Developing a Java application will provide you with the opportunity to apply your knowledge of JShell and JMH in a real-world project.

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Design the application
Implement the application
Test the application
Deploy the application

Career center

Learners who complete Micro-experimentation Tools in Java 9 will develop knowledge and skills that may be useful to these careers:

Software Developer

As a Software Developer, you'll apply your knowledge of programming fundamentals to develop innovative software products. Micro-experimentation Tools in Java 9 will help you develop the tools necessary for more efficient experimentation in your work when writing Java code. This course will teach you how to use JShell and JMH in order to better test your Java code in real-time.

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Software Architect

A Software Architect's job requires an adept understanding of how to translate functional requirements into technical work specifications. Software Architects may also oversee the work of other developers. The Micro-experimentation Tools in Java 9 course will teach you how to use JShell and JMH, which will be indispensable tools as you connect the performance of your designs to your architecture's requirements.

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Software Engineer

Software Engineers design, develop, and implement computer systems. They also are responsible for the maintenance and debugging of software. The Micro-experimentation Tools in Java 9 course can help Software Engineers to better understand how to test Java code in different ways. This course will teach you how to use JShell and JMH, which will help you to analyze and optimize code for many different applications.

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Data Scientist

Data Scientists are experts in the collection, munging, and analysis of data. Using this data, Data Scientists are able to make predictions and recommendations. The Micro-experimentation Tools in Java 9 course will teach you how to use JShell and JMH to test various kinds of Java code. This will help you to identify and mitigate potential issues in data analysis scripts.

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Computer Programmer

Computer Programmers use their expertise in computer programming to write, test, and maintain the software applications and systems that are essential to many industries. The Micro-experimentation Tools in Java 9 course can be helpful for Computer Programmers who are looking to advance their skills in Java code testing. This course will teach you how to use JShell and JMH to write and test high-quality Java code.

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Software Test Engineer

Software Test Engineers are responsible for designing, executing, and evaluating the performance of software. This role requires a high level of knowledge and expertise in software quality assurance practices. The Micro-experimentation Tools in Java 9 can help Software Test Engineers learn about JShell and JMH, which will help them to develop better test plans and strategies for their software testing.

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Computer Systems Analyst

Computer Systems Analysts help organizations to effectively and efficiently use computer systems and technology. This role requires an understanding of both business and technology. The Micro-experimentation Tools in Java 9 course can be helpful for Computer Systems Analysts looking to advance their skills. This course teaches how to use JShell and JMH, which can help Computer Systems Analysts to optimize the performance of the systems they design.

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Information Security Analyst

Information Security Analysts plan and implement security measures to protect an organization's computer systems and networks. Security Analysts also respond to security breaches and incidents. The Micro-experimentation Tools in Java 9 course can be helpful for Information Security Analysts who work in Java-heavy environments. This course will teach you how to use JShell and JMH to analyze the performance of security code, identify potential vulnerabilities, and make recommendations for improvements.

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Database Administrator

Database Administrators are responsible for the maintenance and performance of databases. This role may also be responsible for the design and implementation of database systems. The Micro-experimentation Tools in Java 9 course can be useful for Database Administrators who are looking to gain hands-on experience working with JMH and JShell. This course will teach you how these tools can be used to improve the performance of database systems.

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Web Developer

Web Developers design, develop, and maintain websites and web applications. This role requires an understanding of both front-end and back-end development. The Micro-experimentation Tools in Java 9 may be useful for Web Developers who work on Java-based web applications. This course will teach you how to use JShell and JMH to experiment with and improve the performance of your web applications.

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Quality Assurance Analyst

Quality Assurance Analysts are responsible for testing and evaluating the quality of software products. This role requires an understanding of both software development and quality assurance practices. The Micro-experimentation Tools in Java 9 course can be useful for Quality Assurance Analysts who work on Java-based software products. This course will teach you how to use JShell and JMH to improve your testing and evaluation of software products.

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Project Manager

Project Managers are responsible for planning, organizing, and executing projects. This role requires an understanding of project management methodologies and tools. The Micro-experimentation Tools in Java 9 course may be helpful for Project Managers who work on Java-based projects. This course will teach you how to use JMH to analyze the performance of your projects and identify potential risks.

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Business Analyst

Business Analysts gather and analyze information about businesses in order to understand the needs of the business and its customers. They provide recommendations and solutions to improve the business. The Micro-experimentation Tools in Java 9 course may be helpful for Business Analysts who work in the technology sector. This course will teach you how to use JShell and JMH to analyze the performance of business applications and make recommendations for improvements.

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Data Analyst

Data Analysts collect, analyze, and interpret data in order to identify trends and patterns. They use this information to make recommendations and decisions. The Micro-experimentation Tools in Java 9 course may be helpful for Data Analysts who work in the technology sector. This course will teach you how to use JShell and JMH to analyze the performance of data analysis tools and make recommendations for improvements.

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Statistician

Statisticians collect, analyze, and interpret data in order to make informed decisions. They use statistical methods to identify trends and patterns in data. The Micro-experimentation Tools in Java 9 course may be helpful for Statisticians who work in the technology sector. This course will teach you how to use JShell and JMH to analyze the performance of statistical models and make recommendations for improvements.

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