I have a Linux box on which Java 1.7 is installed:

But for some new tool I need to install the jdk-8u45-linux-x64.tar.gz

I have a pre-install task in package boot that removes all instances of Java 8 of the same architecture as the version being installed. The worst case scenario is the uninstall succeeds and the install fails leaving the user with no Java until the update is run again and succeeds. Jun 28, 2017  We have a need to use an old version of JAVA due to incompatibility with some apps.I have scoured the www for a way to run th. Java Silent Uninstall. By andrewsmith30. This method work only for Java 8 Update 40 and below versions. Because Java change the msi procedures. We highly recommend users remove all older versions of Java from your system. Keeping old and unsupported versions of Java on your system presents a serious security risk. Removing older versions of Java from your system ensures that Java applications will run with the most up-to-date security and performance improvements on your system.

So how can I remove old one and install the new one?

Os X Uninstall Old Java Versions

3 Answers

1. To remove OpenJDK (the one you've already installed)

   sudo apt-get purge openjdk-*

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2. Make a new directory for your new JDK

   sudo mkdir -p /usr/local/java

3. Copy the file to the directory (you should be in that file path)

   sudo cp -r jdk-8u45-linux-x64.tar.gz /usr/local/java/

4. Extract the file

   sudo tar xvzf jdk-8u45-linux-x64.tar.gz

5. You should add this to your PATH now. To do that:

   a. Open /etc/profile : sudo gedit /etc/profile

   b. Scroll down (the end) and add the path where your jdk was installed

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   JAVA_HOME=/usr/local/java/jdk1.8.0_45PATH=$PATH:$HOME/bin:$JAVA_HOME/binexport JAVA_HOMEexport PATH

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   Save and exit

6. Inform your Linux system where your Oracle Java JDK/JRE is located.

   a. Notify the system that Oracle Java JRE is available for use

   sudo update-alternatives --install '/usr/bin/java' 'java' '/usr/local/java/jdk1.8.0_45/bin/java' 1

   b. Notify the system that Oracle Java JDK is available for use

   sudo update-alternatives --install '/usr/bin/javac' 'javac' '/usr/local/java/jdk1.8.0_45/bin/javac' 1

   c. Notify the system that Oracle Java Web start is available for use

   sudo update-alternatives --install '/usr/bin/javaws' 'javaws' '/usr/local/java/jdk1.8.0_20/bin/javaws' 1

7. Inform your Linux system that Oracle Java JDK/JRE must be the default Java.

   a. Set the java runtime environment for the system

   sudo update-alternatives --set java /usr/local/java/jdk1.8.0_45/bin/java

   b. Set the javac compiler for the system

   sudo update-alternatives --set javac /usr/local/java/jdk1.8.0_45/bin/javac

   c. Set Java Web start for the system

   sudo update-alternatives --set javaws /usr/local/java/jdk1.8.0_20/bin/javaws

8. Reload your system wide PATH

   source /etc/profile

9. Check the new version and you're done!

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   java -version

Uninstall Old Versions Of Java Windows

Just unpack the new Java version, for example into /opt. Then do

Put these exports into the startup files for your shell and you should be set. It is not necessary to uninstall the Java 7 installation.

On Centos/Redhat

First do : rpm -qa|grep jdkAnd then : rpm -e <the version which you dont want>

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Java Removing Old Versions

Uninstall Latest Java Update

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