Conclusionĭo you need to switch from OpenJDK 11 to 15? No, not really, based on these results.Tags: Install Java 15 Ubuntu 20.04, Install Java 15 Ubuntu Focal, Install Java Development Kit 15 Ubuntu 20.04, Install Java Development Kit 15 Ubuntu Focal, Install JDK 15 Ubuntu 20.04, Install JDK 15 Ubuntu Focal, Install OpenJDK 15 Ubuntu 20.04, Install OpenJDK 15 Ubuntu Focal, Java 15 Ubuntu 20.04, Java 15 Ubuntu 20.04 Install, Java 15 Ubuntu 20.04 Installation, Java 15 Ubuntu 20.04 Setup, Java 15 Ubuntu Focal, Java 15 Ubuntu Focal Install, Java 15 Ubuntu Focal Installation, Java 15 Ubuntu Focal Setup, Java Development Kit 15 Install Ubuntu 20.04, Java Development Kit 15 Install Ubuntu Focal, Java Development Kit 15 Ubuntu 20.04, Java Development Kit 15 Ubuntu 20.04 Install, Java Development Kit 15 Ubuntu 20.04 Installation, Java Development Kit 15 Ubuntu 20.04 Setup, Java Development Kit 15 Ubuntu Focal, Java Development Kit 15 Ubuntu Focal Install, Java Development Kit 15 Ubuntu Focal Installation, Java Development Kit 15 Ubuntu Focal Setup, JDK 15 Install Ubuntu 20.04, JDK 15 Install Ubuntu Focal, JDK 15 Ubuntu 20.04, JDK 15 Ubuntu 20.04 Install, JDK 15 Ubuntu 20.04 Installation, JDK 15 Ubuntu 20.04 Setup, JDK 15 Ubuntu Focal, JDK 15 Ubuntu Focal Install, JDK 15 Ubuntu Focal Installation, JDK 15 Ubuntu Focal Setup, OpenJDK 15 Ubuntu 20.04, OpenJDK 15 Ubuntu 20.04 Install, OpenJDK 15 Ubuntu 20.04 Installation, OpenJDK 15 Ubuntu 20.04 Setup, OpenJDK 15 Ubuntu Focal, OpenJDK 15 Ubuntu Focal Install, OpenJDK 15 Ubuntu Focal Installation, OpenJDK 15 Ubuntu Focal Setup, Setup Java Development Kit 15 Ubuntu 20.04, Setup Java Development Kit 15 Ubuntu Focal, Setup JDK 15 Ubuntu 20.04, Setup JDK 15 Ubuntu Focal, Ubuntu 20.04 Install Java 15, Ubuntu 20.04 Install Java Development Kit 15, Ubuntu 20.04 Install JDK 15, Ubuntu 20.04 Install OpenJDK 15, Ubuntu 20.04 Java 15, Ubuntu 20.04 Java 15 Install, Ubuntu 20.04 Java 15 Installation, Ubuntu 20.04 Java 15 Setup, Ubuntu 20.04 Java 15 Ubuntu 20.04 Install Java 15, Ubuntu 20.04 Java Development Kit 15, Ubuntu 20.04 Java Development Kit 15 Installation, Ubuntu 20.04 JDK 15, Ubuntu 20.04 JDK 15 Installation, Ubuntu 20.04 OpenJDK 15, Ubuntu 20.04 OpenJDK 15 Install, Ubuntu 20.04 OpenJDK 15 Installation, Ubuntu 20. Quarkus seems to need less memory on Java 15 and both Spring and Quarkus have a bit less loaded classes. I waited two minutes before taking each screenshot below. I installed this on my Ubuntu PC with sudo apt install visualvm and extended the startup commands on the Raspberry Pi so a connection can be made from another PC. Let’s go a step deeper and use VisualVM to inspect the application. No important differences here, the newer JDK doesn’t seem to have any influence here. $ java -jar java-spring-rest-db-0.0.1-SNAPSHOT.jar $ cd JavaOnRaspberryPi/Chapter_10_Spring/java-spring-rest-db/target/ Java 11 is the current Long Term Support version of Java. By default, Debian 11 includes OpenJDK version 11, which is an open-source variant of the JRE and JDK, and is compatible with Java 11. ![]() To compare the startup speeds, I reused the Spring and Quarkus applications of the previous article. One option for installing Java is to use the version packaged with Debian. OpenJDK 64-Bit Server VM Zulu15.27+17-CA (build 15+36, mixed mode) OpenJDK Runtime Environment Zulu15.27+17-CA (build 15+36) Vendor | Use | Version | Dist | Status | IdentifierĪdoptOpenJDK | | 11.0.8.hs | adpt | | 11.0.8.hs-adpt With the SDKMAN tool, you can get a list of available JDKs on your Raspberry Pi and switch to Java 15 with a single command: sdk install java 15.0.0-zulu. Immediately after that, Azul released Azul Zulu OpenJDK 15, including a new version of their free Zulu Embedded JDK, including a version for ARM 64-bit, which is ideal for the latest Raspberry Pi boards! OpenJDK Java 15 was released on, check out the Java Version Almanac for more details. OpenJDK 64-Bit Server VM (build 11.0.8+10-post-Ubuntu-0ubuntu120.04, mixed mode) ![]() ![]() OpenJDK Runtime Environment (build 11.0.8+10-post-Ubuntu-0ubuntu120.04) That version of Ubuntu comes with OpenJDK 11 pre-installed. On the command line, type: su -c 'yum install java-1.7. ![]() Fedora, Oracle Linux, Red Hat Enterprise Linux, etc. If you want to develop Java programs then install the openjdk-7-jdk package. Learn moreįor this post I did some experiments with Java 15, reusing the Ubuntu 64bit SD card which was also used for my earlier post " Startup Speed of Spring and Quarkus JARs on the Raspberry Pi". On the command line, type: sudo apt-get install openjdk-7-jre The openjdk-7-jre package contains just the Java Runtime Environment. Frank Delporte is a Java Champion, Java developer, technical writer at Azul, blogger, author of "Getting started with Java on Raspberry Pi", and contributor to Pi4J.
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