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How do I completely uninstall Java?

by John A.

How do I completely uninstall Java?

Click Start, point to Settings, and then click the Control Panel. In the Control Panel, double-click the Add/Remove Programs. On the Install/Uninstall tab, click the Java version you want to uninstall, and then click Add/Remove. When you are prompted to continue with the Uninstall, click Yes.

How do I uninstall JDK on Windows?

From the Windows Control Panel:

  1. Click Programs and Features.
  2. Select Java Card Development Kit from the list of programs.
  3. Click Uninstall and then Finish.

How do I uninstall Java tools?

The tool is available on the Java Uninstall tool web page. When you first run the app, a User Account Control (UAC) prompt appears asking, ‘Do you want to allow this app to make changes to your PC?’ The Java Uninstall Tool will be listed. Click Yes to allow the app to run.

How do I uninstall Java 11 and install Java 8?

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

Do I need Java?

There aren’t any unless you have Java applications installed or you are planning to develop using Java. Java is necessary to run programs that are written in Java, so if you want to use any such program, you will need to install it. Otherwise you don’t need it and it will simply sit there and not be used.

Can I delete Java 8 update?

The simple answer is: Yes, it is possible to remove older Java updates, and there is an automated way to do this safely (explained below).

How do I completely remove JDK from Ubuntu?

Open up the terminal on Ubuntu. Get the JDK package name using dpkg and grep….Remove Java from Ubuntu

  1. Launch the terminal using Ctrl + Alt + T.
  2. Issue the following command to remove Java from your system. sudo apt remove default-jdk default-jre.
  3. Confirm the uninstallation process by typing y.

How do I downgrade to Java 8?

Information

  1. Step 1: Uninstall current version of Java. Access the Control Panel: In Windows 7 select the Windows button, then select Control Panel.
  2. Step 2: Install desired version of Java. Go to Oracle’s Java SE 8 Archive Downloads page and locate the desired version of Java.

How do I downgrade to Java 8 Ubuntu?

1 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).