If you close the terminal or start a new session, it will be empty again. The JAVA_HOME variable you just declared is temporary. Try to run your program or project in the SAME TERMINAL and see if it works. Now that you have got the location, use it to set the JAVA_HOME environment variable: export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64/bin/javaĬheck the value of JAVA_HOME directory: echo $JAVA_HOME You know, you can copy paste in the Ubuntu terminal. Copy the correct path you got from the above command in your system. In my example, the location of the executable file is /usr/lib/jvm/java-11-openjdk-amd64. Sed is then used to replace /bin/javac by nothing and thus removing it altogether. This is called command substitution and it replaces the command with its output. The readlink command follows a symbolic link. And when you find a path like /usr/lib/jvm/java-11-openjdk-amd64/bin/javac, you remove the /bin/javac from it to get something like /usr/lib/jvm/java-11-openjdk-amd64Īn easier method is to follow the symbolic link and get to the actual executable file directly using this command: readlink -f `which javac` | sed 's:/bin/javac::' If this not working, enter the following function replacing upper one export JAVA_HOME=/jdk1.8.0 export PATH=$PATH:$HOME/bin:$JAVA_HOME/bin JAVA_HOME=/jdk1.8.0 PATH=$PATH:$HOME/bin:$JAVA_HOME/bin export JAVA_HOME export PATH Now enter the following function to the etc/profile file. To do it use the following command sudo nano /etc/profile

Use the following command to extract the downloaded file sudo tar -xvf. Set the path of the terminal to where you downloaded the zip file Next download a Java version from Oracle site Or you can go to settings and check your Ubuntu version. First lets see how to install java on your Ubuntu machine.Ĭheck whether your Ubuntu is 32-bit or 64-bit file /sbin/init

Change java version ubuntu