So, you can go ahead and expand your Scala project and in the "Scala Packages" entry, right click on and select New -> Scala Object. Now run sbt update in your project's directory. Trademarks and brands are the property of their respective owners. You can do this per project if you wish, but I recommend that you add it to your user's SBT settings: ~/.sbt/plugins/plugins.sbt. This page shares a Scala 'Hello, world' example. NetBeans has had support for Scala long before SBT. After installing sbt per the linked instructions above. I looked at a few of those files and didn’t see anything interesting, but the Mill documentation mentions that these files can be helpful when debugging problems. As a first example, we use the standard “Hello, world!” program to demonstrate the use of the Scala tools without knowing too much about the language. You can reuse it in your configuration files. As you can see, I have version 0.12.2 installed. We assume that both the Scala softwareand the user environment are set up correctly. There you go! For instance, if you run a command like this on the “Hello, world” project: you’ll see that there are 69 meta.json files under the out directory. ... this post is sponsored by my books ... I’ve only been using Mill for three days, but the things I like are: The biggest complaints I have about Mill are (a) the warning messages that are unrelated to my project, (b) not picking up my resources files during the run and assembly tasks, and (c) not printing the name of the “fat jar” file the assembly task creates. Then inside of it, enter in the following code: If you are totally unfamiliar with Scala, an object will automatically run and a method called main will be looked up. 学习scala: Hello World. At the time of this writing I don’t know if this is a bug, missing feature, or something else. Since Scala runs on the Java Virtual Machine (JVM), the SDK is required. I prefer it to be somewhere in my home directory like /home/csaba/Programming/Scala/sbt. That was an unusual quirk that stands out in my memory. It must be placed into the project's root folder, which you can find on the last line, in the previous example. Now, this is not a tutorial to learn Scala. There is a lot of hype around it and programmers world-wide are publicly recognizing it as the possible next big thing in programming. If you just want to check for errors during development without taking the time to package, running sbt ~compile will watch for filesystem changes and recompile. Note that the current project was set to the folder you are in and that your console has changed. By Alvin Alexander. This will fix the issue and your tests will run as expected. So, SBT, itself, is just a Java program. GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. Learn more, We use analytics cookies to understand how you use our websites so we can make them better, e.g. If nothing happens, download Xcode and try again. Here’s what the directory structure looks like now: With that test directory structure in place, the next thing to do is to update our build.sc file to add the ScalaTest dependencies, and also reflect that test directory.