JEP 404, Generational Shenandoah (Experimental), has been promoted from Proposed to Target to Targeted for JDK 21. This preview JEP proposes to "enhance the language with unnamed patterns, which match a record component without stating the component's name or type, and unnamed variables, which can be initialized but not used." Both of these are denoted by the underscore character as in r instanceof _(int x, int y) and r instanceof _. JEP 443, Unnamed Patterns and Variables (Preview), has been promoted from Proposed to Target to Targeted for JDK 21. ![]() ![]() InfoQ will follow up with a more detailed news story. Gavin Bierman, consulting member of technical staff at Oracle, has published the first draft of the specification document for review by the Java community. This feature JEP, formerly known as Flexible Main Methods and Anonymous Main Classes (Preview) and Implicit Classes and Enhanced Main Methods (Preview), proposes to "evolve the Java language so that students can write their first programs without needing to understand language features designed for large programs." This JEP moves forward the September 2022 blog post, Paving the on-ramp, by Brian Goetz, Java language architect at Oracle. JEP 445, Unnamed Classes and Instance Main Methods (Preview), has been promoted from Proposed to Target to Targeted for JDK 21. With no intent to implement JEP 436, Virtual Threads (Second Preview), in 32-bit platforms, removing support for this port will enable OpenJDK developers to accelerate development of new features. This feature JEP, introduced by George Adams, senior program manager at Microsoft, proposes to deprecate the Windows x86-32 port with the intent to remove it in a future release. JEP 449, Deprecate the Windows 32-bit x86 Port for Removal, has been promoted from Proposed to Target to Targeted for JDK 21. Use the commande below to save modifications : source /etc/profile.d/java.This week's Java roundup for May 15th, 2023 features news from OpenJDK, JDK 21, Azul Zulu, point releases of Spring Boot, Spring Security, Spring Security Kerberos, Spring Integration, Spring Batch, Spring for GraphQL, Spring Authorization Server, Spring LDAP, Micronaut, Open Liberty, TornadoVM, Hibernate ORM, Apache TomEE, Apache Tika, OpenXava, JBang, JDKMon and Spring I/O conference. To add the environment variable, create a file in the directory /etc/profile.d: vim /etc/profile.d/java.sh profile.d]# cat java.sh The JAVA_HOME is used by some Java applications to determine where Java is installed and to specify the Java version used to run the application. In my case I chose version 11 : ~]# alternatives -config java If you wish to specify another version, enter the corresponding number. This command shows you the versions installed on your system and the one started by default (java-1.8.0-openjdk.x86_64 in my case) If you have installed more than one version and you want a specific version to be started by default, use the following command : ~]# alternatives -config java You can install a minimal version of OpenJDK 8 by typing the command below : ~]# dnf install java-1.8.0-openjdk-headless Set the default version of java : OpenJDK 64-Bit Server VM (build 25.222-b10, mixed mode) ![]() ![]() OpenJDK Runtime Environment (build 1.8.0_222-b10) Version 8 is still used and supported, if your applications require version 8 you can install it with the command below : ~]# dnf install java-1.8.0-openjdk-devel You can install a minimal version of OpenJDK 11 by typing the command below : ~]# dnf install java-11-openjdk-headless Installing OpenJDK 8 : OpenJDK 64-Bit Server VM 18.9 (build 11.0.12+7-LTS, mixed mode, sharing)Īs you can see, the version I installed is 11.0.12. OpenJDK Runtime Environment 18.9 (build 11.0.12+7-LTS) Once the installation is complete, check the version : ~]# java -version Use dnf command below as root (or with sudo if you are not logged in as root) : ~]# dnf install java-11-openjdk-devel In this tutorial, we’re gonna explain how to install one or more Java OpenJDK versions on CentOS 8. CentOS 8’s repository includes the latest two major versions of Java LTS, Java 8 and Java 11 by default.
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