Java is a general-purpose, class-based, object-oriented multipurpose programming language that is popular due to the design of having lesser implementation dependencies, meaning that the compiled Java code can be run on all platforms that support Java without the need for recompilation. Java is also fast, secure, and reliable, therefore. It is widely used for developing Java applications in laptops, data centers, game consoles, scientific supercomputers, cell phones, etc.

JDK 17 (JDK 17) has brought forward new language enhancements, updates to the libraries, support for new Apple computers, removals and deprecations of legacy features, and work to ensure Java code written today will continue working without change in future JDK versions.

In the following tutorial, you will learn how to install the latest Java 17 (JDK 17) on openSUSE 15 Leap.

Prerequisites

Update Operating System

Update your openSUSE operating system to make sure all existing packages are up to date:

sudo zypper refresh -y

Bash/Shell

The tutorial will be using the sudo command and assuming you have sudo status.

To verify sudo status on your account:

sudo whoami

Bash/Shell

Example output showing sudo status:

[joshua@opensuse ~]$ sudo whoami
root

Bash/Shell

To set up an existing or new sudo account, visit our tutorial on adding a User to Sudoers on openSUSE.

To use the root account, use the following command with the root password to log in.

su

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Method 1. Install JDK 17 with RPM

The first method is to download the RPM to install JDK 17. This method is quick and straightforward. However, this method doesn’t leave any room for customization for the installation, which developers often prefer.

First, visit the downloads page and download the latest RPM.

Arm 64 RPM Package:

wget https://download.oracle.com/java/17/latest/jdk-17_linux-aarch64_bin.rpm

x64 RPM Package (Most Common):

wget https://download.oracle.com/java/17/latest/jdk-17_linux-x64_bin.rpm

Next, once the RPM has finished downloading, execute the following command to install JDK 17.

sudo rpm -ivh jdk-17_linux-x64_bin.rpm

Example output:

Preparing...                          ################################# [100%]
Updating / installing...
   1:jdk-17-2000:17-ga                ################################# [100%]
update-alternatives: using /usr/java/jdk-17/bin/java to provide /usr/bin/java (java) in auto mode

Confirm the installation by checking the version and build number:

java --version

Example output:

java 17 2021-09-14 LTS

Method 1. Install JDK 17 – Manual Method

The second and most recommended option is to install Java JDK 17, the manual way that benefits users more freedom and power on what they want and where installed on their system.

Download Latest Java 17 Build

Visit the downloads page to get the latest build version link, then use the following curl command:

curl  -O https://download.oracle.com/java/17/latest/jdk-17_linux-x64_bin.tar.gz

Once the download is complete, you need to extract the archive as follows:

tar -xvf jdk-17_linux-x64_bin.tar.gz

Configure and Install JDK 17

Next, move the extracted archive directory into the /opt/ location:

sudo mv jdk-17 /opt/jdk17

Now you need to set the environment variables as below:

export JAVA_HOME=/opt/jdk17
export PATH=$PATH:$JAVA_HOME/bin

Java 17 is now installed. To confirm, use the following commands:

java --version
echo $JAVA_HOME

If installed correctly, you should see the following output:

java 17 2021-09-14 LTS
Java(TM) SE Runtime Environment (build 17+35-LTS-2724)
Java HotSpot(TM) 64-Bit Server VM (build 17+35-LTS-2724, mixed mode, sharing)
/opt/jdk17

As you can see, you can see the version is the latest Java 17 JDK build.


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Test Java 17 LTS – Create Hello World Application

To finish off, it is always handy to test installations of these kinds to confirm everything is working correctly after being installed. The easy way is to create a small program script to test using the famous Hello World example.

First, create the Java program file as follows

sudo nano hello.java

Next, add the following Java code into the file:

public class hello {
  public static void main(String[] args) {
    System.out.println("G'day from LinuxCapable!");
  }
}

Save the file (CTRL+O), then exit (CTRL+X).

Next, compile the code:

javac hello.java

Finally, run the Java code with the following command:

java hello

Example output:

Congratulations, everything is working correctly.

Comments and Conclusion

In the tutorial, you have learned how to download and install the latest version of Java 17 (JDK 17). Overall, for developers to upgrade Java can be a painstaking task, but in the long term, upgrading to Java 17 will be worth the goal of being an LTS version support will be around along with improvements for quite some time.

 

https://www.linuxcapable.com/how-to-install-java-17-lts-jdk-17-on-opensuse-15-leap/ 

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