Question: How do I uninstall and reinstall Java on Ubuntu?

Contents

How do I reinstall Java on Ubuntu?

Installing the Default OpenJDK (Java 11)

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

24 февр. 2020 г.

How do I uninstall Java on Ubuntu?

8 Answers

Remove all the Java related packages (Sun, Oracle, OpenJDK, IcedTea plugins, GIJ): dpkg-query -W -f=’${binary:Package}n’ | grep -E -e ‘^(ia32-)?( …
Purge config files (careful. …
Remove Java config and cache directory: sudo bash -c ‘ls -d /home/*/.java’ | xargs sudo rm -rf.

2 дек. 2011 г.

How do I uninstall Java 11 on Ubuntu?

3 Answers

Remove the Oracle’s Java folder: sudo rm -r /usr/lib/jvm/java-11-oracle.
Install OpenJDK 8 from APT: sudo apt install openjdk-8-jdk openjdk-8-jre.
Confirm Java version using: java -version.

20 февр. 2019 г.

How do I uninstall Java on Linux?

RPM uninstall

Open Terminal Window.
Login as the super user.
Try to find jre package by typing: rpm -qa.
If RPM reports a package similar to jre- -fcs then Java is installed with RPM. …
To uninstall Java, type: rpm -e jre- -fcs.

How do I reinstall Java?

Reinstalling Java plug-in

Open Internet Explorer.
Click the button to download Java. The installer should begin automatically. If it does not, click the Manual Download link.
Follow the instructions on the screen to install Java.
Restart your computer after the installation of Java.

Where is Java installed on Linux?

The Java files are installed in a directory called jre1. 8.0_73 in the current directory. In this example, it is installed in the /usr/java/jre1. 8.0_73 directory.

How do I completely remove Java?

Manual Uninstall

Click Start.
Select Settings.
Select System.
Select Apps & features.
Select the program to uninstall and then click its Uninstall button.
Respond to the prompts to complete the uninstall.

How do I uninstall Java 13 on Ubuntu?

How To Uninstall JDK From Linux ?

Uninstall Oracle JDK. Remove The Link. First of all remove the alternatives by executing the following commands: $ sudo update-alternatives –remove “java” “/usr/lib/jvm/jdk[version]/bin/java” …
Uninstall Openjdk. If you want to remove Openjdk only, execute the following command on terminal: $ sudo apt-get remove openjdk*

25 апр. 2017 г.

How do I install Java on Linux?

Change to the directory in which you want to install.

Change to the directory in which you want to install. Type: cd directory_path_name. …
Move the . tar. gz archive binary to the current directory.
Unpack the tarball and install Java. tar zxvf jre-8u73-linux-i586.tar.gz. …
Delete the . tar.

How do I update Java 11 on Ubuntu?

Installing Oracle Java SE 11 on Ubuntu 18.04

Step 1: Install Oracle JDK 11. The first thing you need to do is update the system, using the following command: sudo apt update && sudo apt upgrade. …
Step 2: Install Oracle JDK 11 in Ubuntu 18.04/18.10. Once again, you start by adding PPA: Open the Ubuntu terminal, either from app launcher or by pressing Clt + Alt + T.

21 янв. 2020 г.

How do I downgrade Java 11 to Ubuntu 8?

1 Answer

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

12 апр. 2019 г.

How do I install Java?

Download and Install

Go to the Manual download page.
Click on Windows Online.
The File Download dialog box appears prompting you to run or save the download file. To run the installer, click Run. To save the file for later installation, click Save. Choose the folder location and save the file to your local system.

How do I update Java on Linux?

How do I update Java in Linux terminal?

Java is one of the most popular programming languages. …
Open the terminal (Ctrl+Alt+T) and update the package repository to ensure you download the latest software version: sudo apt update. …
Before you install the Java Runtime Environment, make sure you update the repository with: sudo apt update.

How do I uninstall something on Linux?

Click “Start” and select “Default Programs.” Click the “Programs and Features” link at the bottom of the left pane. …
Scroll through the list of your installed programs and locate the scanner utility. …
Click the “Uninstall” button above the programs list and confirm that you want to remove the application, if prompted.