Doubleclick it to open it in the POM editor:Īs you can see, the POM already contains some information – in fact the information that we added when we created our project. Open your project and you will see that a file with that name is already present. In Maven, requirements for libraries (we’re talking about jar files here) are specified in a special project configuration file called pom.xml, often referred to as “the POM”. We will remedy the library-situation first. ECLIPSE MAVEN THE SPECIFIED JRE INSTALLATION DOES NOT EXIST CODEThat’s great, but it’s still empty: we haven’t added any code or necessary libraries (such as the RDF4J libraries) yet. We now have our first Eclipse project, huzzah! Defining the POM Once this has been filled in you can click Finish. artifact id – name of the maven artifact if you publish our project as one.group id – typically you use something like a Java package name for this.For this tutorial, you only have to fill in three fields: In the following screen you define further details of your Maven project, such as group and artifact ids, version number, and so on. Make you sure the option ‘Create a simple project’ is checked:Ĭlick Next again. Once you click Next, you will be presented with a screen to create a new Maven Project. In this dialog, select the option Maven Project: Select the File menu, then New -> New Project. Now that we’re all set up, we can kick things off by creating a new project. The reason we want this, by the way, is that having either the sources or the Javadoc available really helps when you use code autocompletion in Eclipse – Eclipse will automatically read the Javadoc and provide the documentation in a little tooltip. The options “Download Artifact Sources” and “Download Artifact JavaDoc” are unchecked by default. You will see the Maven configuration settings. This step is not required, but it will make things a little easier in the rest of this tutorial.įrom the menu, select Eclipse -> Preferences. Once Eclipse is started (and any welcome messages have been closed), you will be presented with a screen that should look roughly like this:īefore we start creating our actual project in Eclipse, there are a few preferences that we should tweak. ECLIPSE MAVEN THE SPECIFIED JRE INSTALLATION DOES NOT EXIST FREEFeel free to pick/create a directory of your choice, or just accept the default. When starting Eclipse for the first time, you will be asked for a workspace directory – this will be where Eclipse stores all project data as well as some configuration information. ECLIPSE MAVEN THE SPECIFIED JRE INSTALLATION DOES NOT EXIST INSTALLYou are of course free to also install the Maven command line tools, but we won’t be using those directly in this tutorial. We will use this plugin to work with Maven. Select either the “Eclipse for Java developers” or “Eclipse for Java EE developers” installation option.Įclipse IDE comes with a Maven plugin (called m2e) already installed. In this tutorial, we will use Eclipse for Java Developers version 4.18.0 (2020-12), but it shouldn’t matter too much which exact version you have installed. If anything is already sufficiently familiar to you, you are of course free to skip ahead! Setting up your environmentīefore we kick off, you will need to install the Eclipse IDE. ECLIPSE MAVEN THE SPECIFIED JRE INSTALLATION DOES NOT EXIST HOW TOHowever, we do not assume that you know how to use either RDF4J, Maven, or Eclipse, so we’ll go through it all one step at a time. In this tutorial, we assume that you have a basic understanding of programming in Java, and have at least an inkling of what RDF is. But you can work with RDF4J just as well in a different build tool or IDE. Maven is good because it allows you to just define which libraries you want to use and never worry about any further third-party libraries you might need, and Eclipse IDE is good because it has good integration with Maven, code completion features, and is just generally a great Java development environment. These are simply very useful tools for quickly getting a Java project started. You don't have to use Apache Maven or Eclipse IDE if you want to work with RDF4J.
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