Sample output: sudo apt install openjdk-11-jdk Sample output: java -version openjdk version "1.8.0_312" OpenJDK Runtime Environment (build 1.8.0_312-8u312-b07-0ubuntu1~20.04-b07) OpenJDK 64-Bit Server VM (build 25.312-b07, mixed mode) Step 2: Install Java 11 on Ubuntu $ sudo apt install openjdk-11-jdk Steps to Upgrade Java 8 to Java 11 on Ubuntu 20.04 Step 1: Check the current installed Java version $ java -version Hasty migration can lead to overlooked issues and delays. Neglecting performance tuning may result in suboptimal performance.ĭo keep your development team informed and trained on Java 11 features.ĭon’t rush the migration process allocate enough time for thorough testing. Using Oracle JDK without a proper license may lead to legal issues.ĭo monitor your application’s performance after the upgrade.ĭon’t assume your code is optimized for Java 11 consider performance tuning. Suppressing warnings can hide potential issues in your code.ĭo use the latest stable version of OpenJDK 11 for better performance and security.ĭon’t mix Java 8 and Java 11 code in the same project without proper segregation.Ĭombining different Java versions may lead to unexpected behavior.ĭo update any custom scripts or tools that rely on Java 8 functionalities.ĭon’t overlook the impact of Java 11’s new licensing model (Oracle JDK vs. Setting incorrect environment variables, causing version confusion.ĭo ensure your hardware and system requirements meet Java 11 specifications.ĭon’t disable or ignore warnings during the compilation process. Relying on deprecated APIs, leading to runtime issues in Java 11.ĭo read the release notes and migration guides for Java 11.ĭon’t forget to update environment variables like JAVA_HOME. Skipping testing and encountering runtime errors in production.ĭo check for Java 11 compatibility in all your dependencies and frameworks.ĭon’t ignore deprecated APIs in Java 8 that are removed in Java 11. Using outdated build tools, causing compatibility issues.ĭo thoroughly test your application with Java 11 on a staging environment.ĭon’t assume everything will work the same as with Java 8. Java 8 to Java 11 Upgrade: Dos, Don’ts, and Common Mistakes on Ubuntu 20ĭo take a backup of your codebase and critical data before upgrading.ĭon’t directly upgrade from Java 8 to Java 11 without testing.įailing to back up important files before upgrading, leading to data loss.ĭo update your build tools (e.g., Maven, Gradle) to their latest versions.ĭon’t forget to update third-party libraries and dependencies. Overall, Java 11 includes many new features and improvements that make it easier to develop and deploy Java applications. JEP 330: Launch Single-File Source-Code Programs: This feature allows you to run a Java source file as a standalone program without compiling it first.JEP 321: HTTP Client (Standard): This feature provides a new standard HTTP client API in the package.TLS 1.3 support: Java 11 includes support for TLS 1.3, which provides improved security and performance over previous versions of TLS.Nest-based access control: This feature allows classes to be nested inside other classes, and provides improved access control for nested classes. Improved Docker support: Java 11 includes enhancements to better support running Java applications in Docker containers, including better memory handling and process identification.Unicode 10: Java 11 supports Unicode 10.0.0, which adds over 8,000 characters, including new emoji characters.HTTP Client: This is a new standardized HTTP client API that supports HTTP/1.1 and HTTP/2, and provides support for WebSocket and HTTP/2 server push.Epsilon GC: This is a new garbage collector that is designed for use cases where very short pauses are acceptable, but low memory footprints and high throughput are required.Flight Recorder: This feature allows you to record and analyze events and performance data in real-time or after the fact, making diagnosing and fixing problems in your application easier.The local variable syntax for lambda parameters: This feature allows you to use the “var” keyword to declare the type of a lambda parameter, making code more concise and readable.Some of the key features of Java 11 include: Java 11, also known as Java SE 11, was released on September 25, 2018, and is a long-term support (LTS) version of the Java programming language. This blog will discuss how to upgrade Java 8 to Java 11 on Ubuntu 20. Java 11, also known as Java SE 11, is a long-term support (LTS) version of the Java programming language, and it provides several new features and enhancements over its predecessor, Java 8. Java is one of the most popular programming languages in the world, used for building a wide range of applications from desktops to mobile and web applications. This article will show you how to upgrade Java 8 to Java 11 on Ubuntu 20.04.
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