In our today’s guide, we’ll talk about how to install Java 14 / OpenJDK 14 on CentOS 7/8 & Fedora 31/30/29. Java 14 is now available for general usage – Check out General Availability release notes for new features. Production-ready binaries are also available from Oracle for Java SE Development Kit 14.

JDK 14 is the open-source reference implementation of version 14 of the Java SE Platform as specified by by JSR 388 in the Java Community Process. Install JDK | OpenJDK 14 on your CentOS 8/7 & Fedora 31/30/29 by following the steps below.

Option 1: Install OpenJDK 14 on CentOS 8/7 & Fedora 31-28

Visit JDK 14 releases page to download the latest archive.

sudo yum -y install curl
curl -O https://download.java.net/java/GA/jdk14/076bab302c7b4508975440c56f6cc26a/36/GPL/openjdk-14_linux-x64_bin.tar.gz

Extract the downloaded OpenJDK 14 archive file using tar command.

tar xvf openjdk-14_linux-x64_bin.tar.gz

Move the resulting folder to /opt directory.

sudo mv jdk-14 /opt/

Configure Java environment:

sudo tee /etc/profile.d/jdk14.sh <<EOF
export JAVA_HOME=/opt/jdk-14
export PATH=$PATH:$JAVA_HOME/bin
EOF

Source your profile file and check java command

source /etc/profile.d/jdk14.sh

Confirm Java version.

$ echo $JAVA_HOME
/opt/jdk-14

$ java -version
openjdk version "14" 2020-03-17
OpenJDK Runtime Environment (build 14 36-1461)
OpenJDK 64-Bit Server VM (build 14 36-1461, mixed mode, sharing)

Option 2: Install Java SE Development Kit 14 on CentOS 8/7 & Fedora 31-29

If you choose to go with Java SE Development Kit 14, download RPM package for CentOS / RHEL / Fedora system using the command below.

curl -LO -H "Cookie: oraclelicense=accept-securebackup-cookie" 
"https://download.oracle.com/otn-pub/java/jdk/14 36/076bab302c7b4508975440c56f6cc26a/jdk-14_linux-x64_bin.rpm"

Then install the RPM package using the yum or rpm command. 

$ sudo rpm -Uvh jdk-14_linux-x64_bin.rpm
warning: jdk-14_linux-x64_bin.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
Verifying...                                                            (10################################# [100%]
Preparing...                                                            (10################################# [100%]
Updating / installing...
   1:jdk-14-2000:14-ga                ################################# [100%]

Confirm Java version installed

$ java -version
java version "14" 2020-03-17
Java(TM) SE Runtime Environment (build 14 36-1461)
Java HotSpot(TM) 64-Bit Server VM (build 14 36-1461, mixed mode, sharing)

Configure Java environment.

cat <<EOF | sudo tee /etc/profile.d/jdk14.sh
export JAVA_HOME=/usr/java/default
export PATH=$PATH:$JAVA_HOME/bin
EOF

To use Java Home, source the file.

source /etc/profile.d/jdk14.sh

Test Java Installation

Create a HelloWorld Java program.

$ vi HelloWorld.java 
public class HelloWorld {

    public static void main(String[] args) {
        // Prints "Hello, World" to the terminal window.
        System.out.println("Hello, World");
    }

}

Compile Java code.

$ javac HelloWorld.java

Run your Java program.

$ java HelloWorld
Hello, World

Choosing Default Version of Java

If you have more than one version of Java installed, you can set default one using alternatives command.

sudo alternatives --config java

Select Java to set as default.

$ sudo alternatives --config java

There is 1 program that provides 'java'.

  Selection    Command
-----------------------------------------------
*  1           /usr/java/jdk-14/bin/java

Enter to keep the current selection[ ], or type selection number:

Recommended books:

Best Java Development Books to read

Enjoy your Java Development on a Linux machine and check other related guides in our blog.

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