News

How do I change the default Java version in Linux?

By Angel Hume

How do I change the default Java version in Linux?

Choose your default Java Version. sudo update-java-alternatives -s $(sudo update-java-alternatives -l | grep 8 | cut -d ” ” -f1) || echo ‘. ‘ It will automatically fetch any java 8 version available and set it using the command update-java-alternatives .

How do I change the default version of Java?

How to Change Java Versions in Windows (Updated for Java 17)

  1. Step 1: Installing Multiple Java Versions. Installing multiple Java versions in parallel is incredibly easy in Windows.
  2. Step 2: Define Java Environment Variables.
  3. Step 3: Install the Scripts to Change the Java Version.
  4. Step 4: Add the Script Directory to the Path.

How do I change my default Java to Ubuntu?

Installing the Default OpenJDK (Java 11)

  1. First, update the apt package index with: sudo apt update.
  2. Once the package index is updated install the default Java OpenJDK package with: sudo apt install default-jdk.
  3. Verify the installation, by running the following command which will print the Java version: java -version.

How do I find my alternate Java version in Linux?

To see the full alternatives (including slaves), use the –display option: tux > sudo update-alternatives –display java java – auto mode link best version is /usr/lib64/jvm/jre-1.8.

How do I change Java alternatives in Linux?

B. 6. Setting the default JDK with the alternatives Utility

  1. Become the root user. The alternatives utility needs to be run with root privileges.
  2. Set java . Run the following command: /usr/sbin/alternatives –config java.
  3. Set javac . Enter this command: /usr/sbin/alternatives –config javac.
  4. Extra Step: Set java_sdk_1.

How do I install Java update-alternatives?

In this time lets install openJDK 8 version.

  1. get update your apt sudo apt-get update.
  2. Now install openJDK 8 sudo apt-get install openjdk-8-jre.
  3. Set the variables echo “JAVA_HOME$(which java)” | sudo tee -a /etc/environment.
  4. Reload the system variables source /etc/environment.
  5. Verify variables using this echo $JAVA_HOME.

What is Update-alternatives in Linux?

When each package providing a file with a particular functionality is installed, changed or removed, alternatives is called to update information about that file in the alternatives system. alternatives is usually called from the %post or %pre scripts in RPM packages.

How do I change Java update to alternatives?

How To Install And Switch Between Alternative Java Versions

  1. Check whether your Ubuntu is 32-bit or 64-bit file /sbin/init.
  2. Use the following command to extract the downloaded file sudo tar -xvf .tar.gz.
  3. Open /etc/profile file.
  4. Now reload the environment . /

How do I change java update using Linux alternatives?

Assuming one has installed a JDK in /opt/java/jdk1.8.0_144 then:

  1. Install the alternative for javac $ sudo update-alternatives –install /usr/bin/javac javac /opt/java/jdk1.8.0_144/bin/javac 1.
  2. Check / update the alternatives config: $ sudo update-alternatives –config javac.