Run Scala Application From Command Line

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You want to use SBT to compile and run a Scala project and package the project as a JAR file. It shows the proper syntax for creating a hellosh shell script that you can execute just like any other normal shell script.

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Type in expressions to have them evaluated.

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Run scala application from command line. Link brightness_4 code Scala Program on command line argument. Scalac Helloscala scala Hello Hello world When using this approach any command-line arguments to your application are implicitly available through an args object which is inherited from the App trait. Its best that you enclose both in double quotes just in case there is a space somewhere in the path.

Replace the program name with the exact files system name of the program but not its shortcut name. Running our application To run our simple application right click anywhere inside the HelloWorldMainscala file and select Run HelloWorldMain. Bundle the application in.

After that you will see new Scala prompt waiting for your input as shown below. This pulls the hello-world template from GitHub. In the sbt shell enter the run command to run the program.

Is printed in the console window. To run Scala from the command-line simply download the binaries and unpack the archive. Updating your applications 1.

Execute a Scala application using the run task from the application plugin. Type Start path to the associated program Path to the jsh file. Scala This is a Scala shell.

We can see our application was ran and the String Hello World from main function. To debug code in Scala tests refer to a general debugging procedure. Add command line arguments to run configuration.

Be sure to add a space. The run task tells Gradle to execute the main method in the class assigned to the mainClass property. Though you normally use the Simple Build Tool SBT to build Scala applications you may want to use more basic tools to compile and run small test programs in the same way you might use javac and java with small Java applications.

To start Scala REPL open command prompt and simply type Scala. For quick access add scala and scalac to your path. Running the mining.

The scala command starts an interactive shell where Scala expressions are interpreted interactively. Evaluate your results in the Debug tool window. CLI Miner Command-line interface.

In the console window we can see our HelloWorldWithArguments Scala application ran with the following output. Youre running SBT from your operating system command line. Run the following command sbt new scalahello-worldg8.

There are two different possible scenarios here. Sbt compiles runs and tests your Scala code. Just save that code to a file named Helloscala compile it with scalac and then run it with scala like this.

Here is an example. How do I pass command-line parameters to my Scala application when Im running the application with SBT. Replace path to the associated program with the full path of the program that you specified to open and run jsh files and replace Path to the jsh file with the full path to the jsh file.

Scala developed a custom CPU and ARM-friendly algorithm called Panthera. When prompted name the application hello-world. Our command line arguments were empty.

1 Running inside the SBT shell. This is an excerpt from the Scala CookbookThis is Recipe 145 How to compile Scala code with scalac and run it with scala. Now you can type of any Scala expressions or code in prompt and hit enter and you will get the output immediately as shown below.

CLI Wallet Command-line. Run Program from CMD on Windows 10 Next you can type start command in Command Prompt window and press Enter to open the target application in CMD. Using command-line sbt is a build tool for Scala.

For accessing our Scala command-line arguments using the args array which is made available to us implicitly when we extend App. Scala shell script As a final note if you want to wrap your Scala script in a UnixLinux shell script so you can easily execute it from the command line take a look at my Scala shell script wrapper example. It can also publish libraries and do many other tasks cd to an empty folder.

It will also create a target folder which you can ignore. Well thats expected since we did not pass any arguments when starting our HelloWorldWithArguments Scala application. Ill show how both of those work.

IntelliJ IDEA lets you test your Scala applications using ScalaTest and Specs2. Start the Scala compiler by launching scalac from where it was unarchived. Start the Scala interpreter aka the REPL by launching scala from where it was unarchived.

Using Scala interpreter to run scala script. Print all given objects. You can also set and run the test scopes.

Thanks to the application plugin you can run the application directly from the command line. Gradlew run Task apprun Hello world. Youre running from inside the SBT shell.

If you dont want this. Run Returns scalasysprocessProcess and executes the command right after with output displaying All along weve been creating our ProcessBuilder out of a String.

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