The standard way for managing multiple versions of the same software on Ubuntu is via the Debian Alternatives System. In the case of Ubuntu 18.04 LTS, it's the package openjdk-11-jdk at the moment. “This dependency package points to the Java runtime, or Java compatible development kit recommended for this architecture…” For example, openjdk-11-source contains source files for the classes of the Java core API, while openjdk-11-dbg contains the debugging symbols.īesides the openjdk-* family, there's the default-jdk package, that is worth exploring: $ apt show default-jdkĪt the end of the output, the description says: We may find some of these packages useful. Openjdk-11-source/bionic-updates,bionic-updates,bionic-security,bionic-security 10.0.2+13-1ubuntu0.18.04.2 all Openjdk-11-doc/bionic-updates,bionic-updates,bionic-security,bionic-security 10.0.2+13-1ubuntu0.18.04.2 all Let's explore which other packages we have at our disposal besides the default jdk package: $ apt list openjdk-11* Listing. Let's have a look at the “Depends” section of the output. We can see that if we inspect the package: $ apt show openjdk-11-jdk It's also worth noting that although the package is called openjdk-11-jdk, as of this writing, it actually installs version 10.0.2.
Now we should see the same version number as shown above: javac 1.8.0_181 3.2. Let's check that the javac executable is available as well: $ javac -version OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode) The result should list a Runtime Environment and a JVM: openjdk version "1.8.0_181" Now, let's verify the installation: $ java -version
#Install java 8 on ubuntu install
Let's install OpenJDK 8 from the “Main” repository with apt: $ sudo apt update It's supported by Canonical - the same company that maintains Ubuntu itself. The “Main” repository is available by default on all Ubuntu systems.
Of course, we can also head to the OpenJDK website, grab a package there, and install it the same way we've seen in the previous section.īut using the apt tooling and the “Main” repository provides some benefits. For this reason, we can find an up-to-date version of OpenJDK 8 in the “Main” repository on most of the supported Ubuntu versions. JDK 8 is an LTS version that has been around for a while.
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