I learned about the Scala REPL :require command by looking at the help from within the REPL. I usually find that I need to add a jar file to the Scala REPL after I've been running the REPL, but if you happen to know that you're going to need to add a jar file to the classpath when you start the interpreter, you can do so like this:Īs you can see, this approach uses the usual "-cp" classpath option that is used by the scalac and javac commands. Adding a jar file to the classpath when you start the Scala interpreter Your new classpath is: ".:/Users/Al/tests/myjar.jar"Īt this time you can begin using the classes in your jar (though you'll have to import them, as usual). You can get into a REPL on (OS X or Linux) from your terminal, from two different commands. To add a new jar file to the Scala REPL classpath (interactive command line classpath), use the :require command at the command line, like this:Īfter you do this, you should see a reply from the REPL like this:Īdded '/Users/Al/tests/myjar.jar'. Scala REPL FAQ: How do I add a Jar file to the Scala REPL classpath? (The Scala REPL is the interactive command line you get if you just type scala at your command line.)
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