In this collection of Java resources, we collect all our helpful resources into one convenient place, including Java cheat sheets, Java programming resources, and other Java developer resources.
If you are a JRebel or XRebel user, we will also provide resources on how to get the most out of JRebel so you can save as much time as possible — wherever you may be working.
JRebel Developer Resources
The resources in this section are designed to help users get the most out of our Java productivity tools, JRebel and XRebel. For full support documentation for JRebel and XRebel, please visit the links below.
- JRebel Support Documentation – Get full support documentation for JRebel, including supported Java technologies, installation guides, and troubleshooting materials.
- XRebel Support Documentation – XRebel support documentation includes a list of supported technologies and features resources for installing, configuring, and troubleshooting XRebel.
JRebel Remote Configuration Resources
Whether you are working on-premise, on a virtual machine, remote server, or offline, JRebel can give the same time-saving benefits for your team. The resources below will help you and your team stay productive with JRebel while working remotely.
Remote Server Configuration Guides
Configuring JRebel for remote server and virtual machine use is as easy as following these guides:
- Eclipse Remote Server and Virtual Machine Setup - Step by step instructions for enabling remote server support for JRebel in Eclipse.
- NetBeans Remote Server and Virtual Machine Setup - Using NetBeans? This guide will help you get JRebel configured for your remote server.
- JDeveloper Remote Server and Virtual Machine Setup – If you’re using JDeveloper, use this guide to configure JRebel for your remote server.
- IntelliJ IDEA Remote Server and Virtual Machine Setup - See how to set up JRebel for remote server usage in IntelliJ IDEA with this guide.
Need support during your configuration? Email our team — we are here to help!
Remote Licenses for JRebel and XRebel
Working remotely with JRebel is easy, regardless of your license time. This blog on JRebel for remote machines breaks down the licensing options you have, and how you can use JRebel or XRebel offline.
Configuring JRebel for Cloud Services
Developing in the cloud(s)? JRebel supports many popular cloud services, including AWS, Bluemix and Cloud Foundry. If you’re getting started with setup, these guides can help you through the process
- JRebel for Amazon Web Services – Working with AWS? This guide will help you with the JRebel configuration process.
- JRebel for IBM Bluemix – Using the IBM Bluemix cloud? See how to set up JRebel for Bluemix with this step-by-step guide.
- JRebel for Cloud Foundry – If you’re working with Cloud Foundry, or a Cloud Foundry distribution, be sure to check out this guide.
JRebel Troubleshooting Resources
Having issues with JRebel? We have a variety of JRebel troubleshooting resources available to help – and we’re always happy to chat if you need further assistance!
- Server or Application Won’t Start – Try these tips for troubleshooting an application or server that won’t start during JRebel configuration.
- JRebel Won’t Start – If JRebel won’t start, these resources can help you troubleshoot the issue.
- JRebel License Expired – If you’re getting an error message showing JRebel as expired, this documentation can help
- Classes or Resources Not Reloading – If you’re having issues with classes and resources not being reloaded by JRebel, this guide can help.
- Switching JRebel Agents – Want to switch between the JRebel agent and the Legacy Agent? This guide shows how.
Helpful Java Resources for Application Performance
Any developer can make an application, but it takes a metered and careful approach to create an application that performs well both at baseline and at scale. To help developers, our Java experts work tirelessly to create new guides and resources for improving Java performance.
Whether that’s a guide to solving simple N+1 issues (like in the video below), or using resilience patterns in complex microservices applications, our guides offer insight into how developers can develop better performing applications before they reach production.
Java Performance Articles
- How to Find Microservices Performance Issues – See the ways in which developers can find microservices performance issues during all stages of development.
- Common Performance Problems With Microservices – See the common performance problems at the heart of poor microservices performance in Java.
- Solving the N+1 Problem in Java – Working with an RDBMS? Better keep this article nearby for fixing N+1 problem.
- How to Improve JPA Performance – Working with JPA? This guide can show you how to improve performance.
- Four Best Practices for JPA Performance – This article shows developers how to proactively develop for better application in JPA.
- Performance Tuning Garbage Collection – This article (and video interview) shows how to tune Java garbage collectors for optimal performance.
Java Performance White Papers
- Developer’s Guide to Microservices Performance – If you’re transitioning to, or creating a microservices application, it’s important to consider performance. This guide gives key considerations for developers taking the plunge.
- Top 5 Best Practices for Streamlining Java Development – Writing performant code is one thing, but are you taking developer performance into account? This white paper shows five ways to improve Java development processes.
Java Performance Webinars and Videos
- Improving Performance in Java Microservices - See ways to improve performance in Java microservices with this webinar from our Java pros.
- Eight Ways to Improve Java Microservices Performance – Expanding on the previous webinar, this webinar shows additional ways to improve Java microservices performance.
- JRebel and XRebel With Microservices and Docker – This video shows how JRebel and XRebel work in tandem to quickly fix a performance issue in a Docker container-based microservices application.
Helpful Java Cheat Sheets
Our collection of Java cheat sheets makes using Java and Java technologies a breeze. Our Java experts have put together a selection of free, one-page cheat sheets that you can use to keep commonly-used keyboard shortcuts and techniques close at hand.
Java Language Cheat Sheets
If you’re working with Java 8, Java 9, or one of these popular language features in Java, these cheat sheets can help you with syntax and basic concepts.
- Java 8 Cheat Sheet – This Java 8 cheat sheet includes sections on Default methods, Lambdas, and more.
- Java 9 Modules Cheat Sheet – See how to manage modules, and the various command line options needed to work with them in this cheat sheet.
- Java Collections Cheat Sheet – This Java collections cheat sheet gives an easy-to-scan overview of Java collection capabilities and libraries.
- JVM Options Cheat Sheet – This cheat sheet gives a one-page guide to standard, non-standard, and advanced options in the JVM.
- Java Streams Cheat Sheet – This cheat sheet looks at streams, parallel streams, and useful operations for working with Java Streams.
- Java Regex Cheat Sheet – From character classes, to patterns and matchers, this cheat sheet covers all the essentials for working with Java regular expressions.
- Java Generics Cheat Sheet – With basics, wildcards, PECS, and covariance and contravariance visualizations, this guide helps developers to work with Java generics.
Java Technology Cheat Sheets
Working with Docker, Spring, or SQL? These Java technology cheat sheets can help you to remember the various commands and annotations needed to interface with these technologies.
- Git Cheat Sheet – Working with Git? This cheat sheet gives all the useful commands you need on one a one-page pdf.
- Docker Commands Cheat Sheet – Get useful one-liners, commands, and compose syntax for Docker with this one-page cheat sheet.
- JUnit Cheat Sheet – Get the assertions, assumptions, resolutions, and useful code annotations and snippets for working with Junit.
- SQL Cheat Sheet – From basic queries, to utility functions, our SQL cheat sheet includes useful information to make using SQL easier.
- Maven Options Cheat Sheet – Working with Maven? This cheat sheet looks at useful command line options, essential plugins, and more.
- Spring Annotations Cheat Sheet – If you’re working in Spring Boot, Spring Cloud, or Spring Framework, this annotations cheat sheet will make your life easier.
- RxJava Cheat Sheet – See the basic of RxJava, including classes, observables, RxBindings and data processing functions in this one-page cheat sheet.
Java IDE Cheat Sheets
Whether you’re working with IntelliJ IDEA, Eclipse, or NetBeans, our cheat sheets give you the keyboard shortcuts you need to get quickly navigate these Java IDEs.
- NetBeans Shortcuts Cheat Sheet – This one-page NetBeans shortcuts cheat sheet PDF makes it easy to get started with NetBeans.
- IntelliJ Shortcuts Cheat Sheet – One of the many developers using IntelliJ? These shortcuts can help save you some time.
- Eclipse Shortcuts Cheat Sheet – Working with the Eclipse IDE? These shortcuts are a life saver if you’re just getting started.