Remove All Java Versions
- Remove all the Java related packages (Sun, Oracle, OpenJDK, IcedTea plugins, GIJ). Installing Java 7 in 16.04 and using multiple Java versions. Completely remove Java 9 from Ubuntu 17.10. Problem with uninstalling java. Hot Network Questions How slow was the 6502 BASIC compared to Assembly.
- To remove OpenJDK (the one you've already installed) sudo apt-get purge openjdk-. Make a new directory for your new JDK. Sudo mkdir -p /usr/local/java.
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
So how can I remove old one and install the new one?
It can with a single command-line remove all older versions of the program, without the need of third-party software. If you want to remove all Java-related software use the following line: wmic product where 'name like 'Java%%' call uninstall /nointeractive. We highly recommend that you uninstall all older versions of Java from your system. Keeping old versions of Java on your system presents a serious security risk. Uninstalling older versions of Java from your system ensures that Java applications will run with the latest security and performance improvements on your system. How can I remove. 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.
ProgrammerProgrammer3 Answers
To remove OpenJDK (the one you've already installed)
sudo apt-get purge openjdk-*Make a new directory for your new JDK
sudo mkdir -p /usr/local/javaCopy the file to the directory (you should be in that file path)
sudo cp -r jdk-8u45-linux-x64.tar.gz /usr/local/java/Extract the file
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sudo tar xvzf jdk-8u45-linux-x64.tar.gzYou should add this to your PATH now. To do that:
a. Open /etc/profile :
sudo gedit /etc/profileb. Scroll down (the end) and add the path where your jdk was installed
JAVA_HOME=/usr/local/java/jdk1.8.0_45PATH=$PATH:$HOME/bin:$JAVA_HOME/binexport JAVA_HOMEexport PATHSave and exit
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' 1b. 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' 1c. 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' 1Ti nspire software.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/javab. Set the javac compiler for the system
sudo update-alternatives --set javac /usr/local/java/jdk1.8.0_45/bin/javacc. Set Java Web start for the system
sudo update-alternatives --set javaws /usr/local/java/jdk1.8.0_20/bin/javawsReload your system wide PATH
source /etc/profileCheck the new version and you're done!
java -version
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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