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Platform Introduction

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      A simple Java orientation intro for non-Java folk who are evaluating the Couchbase Scala SDK.
      Is This Page for You?

      This page is to help evaluate the Couchbase Java SDK, if Java is not where you spend the majority of your working day. It is aimed at Software Architects, QE folk, managers, and anyone else who needs to run through using the Java SDK without necessarily being comfortable with the Java environment. If this is not you, head back to the rest of the Couchbase Java SDK documentation.

      JVM Installation

      Java is a JVM language - like Scala, Kotlin, and Clojure, it runs on a Java Virtual Machine. Running JVM programs necessitates a Java Runtime Environment (JRE), but to develop a Scala (say) or Java app you need a Java Development Kit (JDK). The Couchbase Java SDK can run on any LTS (long-term support) JDK — see the compatibility page for full information.

      To install the JDK we are going to use a JVM-management tool called sdkman.

      SDKMAN!

      SDKMAN! — the Software Development Kit Manager — enables multiple Java versions and runtimes to be installed and managed, without intefering with your system’s default JVM.

      This third party tool is unnecessary in most production environments, but ideal for development machines. Installation instructions can be found on the SDKMAN! website.

      Once SDKMAN! is installed, use it to install the latest version of Java:

      $ sdk install java 23.0.2-oracle

      You may be prompted to set that version as a default — say yes (by pressing <Enter>). More details of SDKMAN! use can be found on the SDKMAN! website.