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How to change java version in ubuntu?

Jim Brown

How to change java version in ubuntu?

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 to change java version in linux?

Procedure

  1. Download or save the appropriate JDK version for Linux.
  2. Extract the compressed file to the required location.
  3. Set JAVA_HOME using the syntax export JAVA_HOME= path to JDK .
  4. Set PATH using the syntax export PATH=${PATH}: path to the JDK bin .
  5. Verify the settings using the following commands:

How do I switch from Java 11 to Java 8 Ubuntu?

Best Answer

  1. You have to install the openjdk-8-jre : sudo apt-get install openjdk-8-jre.
  2. Next switch to the jre-8 version: $ sudo update-alternatives –config java There are 2 choices for the alternative java (providing /usr/bin/java).

How do I change which Java version is installed?

Enable the latest installed version of Java in the Java Control Panel

  1. In the Java Control Panel, click on the Java tab.
  2. Click View to display the Java Runtime Environment Settings.
  3. Verify that the latest Java Runtime version is enabled by checking the Enabled box.
  4. Click OK to save settings.

How do I export Java home?

Linux

  1. Check if JAVA_HOME is already set , Open Console.
  2. Make sure you have installed Java already.
  3. Execute: vi ~/.bashrc OR vi ~/.bash_profile.
  4. add line : export JAVA_HOME=/usr/java/jre1.8.0_04.
  5. save the file.
  6. source ~/.bashrc OR source ~/.bash_profile.
  7. Execute : echo $JAVA_HOME.
  8. Output should print the path.

How do I change java version in Redhat?

Switching Java Versions There are two ways to select the Java version you want: Switch java and javac binaries system wide via alternatives. This approach requires root privileges. Select the JDK on a per-application basis by setting JAVA_HOME.

Where is java installed by default on linux?

/usr/bin/java
When you install Java with default apt install command on Ubuntu or CentOS Linux OS then it will install Java under default folder /usr/bin/java .

What is default Java Ubuntu?

Installing the Default JRE/JDK The easiest option for installing Java is to use the version packaged with Ubuntu. By default, Ubuntu 18.04 includes OpenJDK version 11, which is an open-source variant of the JRE and JDK. To install this version, first update the package index: sudo apt update.

Which Java do I have?

The Java version can be found in the Java Control Panel. Under the General tab in the Java Control Panel, the version is available through the About section. A dialog appears (after clicking About) showing the Java version.

How to change the default Java version on Ubuntu?

Now, let’s run the following command to see all available Java versions: Running the above command displays a list of installed Java JDKs and JREs allowing you to select the one as you want to set as default. There are 2 choices for the alternative java ( providing /usr/bin/java) .

How to change Java / JDK version and classpath in Linux?

How to change Default Java /JDK Version and ClassPath in Linux using .bash_profile? When you install Java with default apt install command on Ubuntu or CentOS Linux OS then it will install Java under default folder /usr/bin/java. First thing first.

How to switch between different versions of Java?

For example, you have installed multiple Java versions on your Ubuntu system. Now you want to switch to other Java version as default Java. Use update-alternatives command to set default Java version as following: sudo update-alternatives –config java. According to the above screenshot, Java 10 is now set as default Java version on your system.

How to check Java version installed on Linux?

Method 1: Check the Java Version On Linux. To check the Java version on Linux Ubuntu/Debian/CentOS: 1. Open a terminal window. 2. Run the following command: java -version. 3. The output should display the version of the Java package installed on your system.