With simple command java -version you will see which JDK it referred to. This is the default Java version available for you to use. For new re-imaged host it will completely install new Java/JDK binary for you.Īfter that – just use command which java to find out CLASSPATH variable. Openjdk-9-jre-headless is already the newest version (9~b161-1).Ġ upgraded, 0 newly installed, 0 to remove and 0 not upgraded.Īs you see above, I already have latest JDK 9 installed and then there is no need to download any extra package here.

Use below linux command to install latest Java in Ubuntu, CentOS: apt install openjdk-9-jre-headless

Please make sure to upgrade to Latest JDK. How to install or upgrade JVM in Linux OS? OpenJDK 64-Bit Server VM 18.9 (build 11.0.2+9, mixed mode)Ī good reference about Java version switching.When you install Java with default apt install command on Ubuntu or CentOS Linux OS then it will install Java under default folder /usr/bin/java. OpenJDK Runtime Environment 18.9 (build 11.0.2+9) We can confirm this by checking the installed java version using the following command: $ java -version bash_profilefile if we simply add the following line with the desired version then it will switch to that specific version.Įxport JAVA_HOME=`/usr/libexec/java_home -v 1.8` Library/Java/JavaVirtualMachines/openjdk-11.0.2.jdk/Contents/Home In this article we see ways to switch between different Java versions.įirst of all we can check all the available java versions installed in Mac using following command: $ /usr/libexec/java_home -Vġ1.0.2, x86_64: 'OpenJDK 11.0.2' /Library/Java/JavaVirtualMachines/openjdk-11.0.2.jdk/Contents/Homeġ.8.0_222, x86_64: 'AdoptOpenJDK 8' /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home We might have multiple Java versions installed in Mac and we may need to switch versions. There are many ways to install Java in Mac OS. If we need to do something with Java we will have to install java into the Mac OS. A Mac does not come with a default Java installed.

Switch java version mac