Command-line utility for converting source code in Java to Scala, via http://javatoscala.com
The fastest way:
- Download a pre-built release from: https://github.com/piotrklibert/java2scala/releases/download/0.0.1/java2scala-converter.zip
- Unzip it
- Make sure the unzipped
./java2scala/bin/directory is on yourPATH - Run with
java2scala -d <dirname>
Despite it being abandoned and not develeped anymore, the java2scala.com1 is still up and - surprisingly enough - still works pretty well.
It's possible to build and run the software behind it locally2, but with the last commit being in 2015 I found it really hard to make it work on Scala 2.13, which is why I turned to the online solution.
I don't like manually copying and pasting dozens of files, so I wrote this script, which searches given directory for Java files and converts all of them to Scala files. Scala files are saved next to Java ones, with only extension changed.
The script is written in Scala itself and I'm surprised at how short and clean the implementation turned out, especially given the "static typing" and "on JVM" properties of the language.
The resulting distribution is still 27Mb though...