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Updated Scala modularization and classpaths (markdown)

eugene yokota 2019-04-18 11:03:29 -04:00
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Scala-modularization-and-classpaths.md

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Scala modularization makes it necessary to deal with some existing issues that mainly relate to the (Java) boot classpath and to using Scala jars from a `lib/`.
## Java boot classpath
## Java boot classpath (bootstrap classpath)
The term "boot classpath" comes from Java's Bootstrap Classes, which are the classes that implement the Java Platform. By default, bootstrap classes are in the `rt.jar` and several other jar files in the `jre/lib` directory according to [How Classes are Found](https://docs.oracle.com/javase/8/docs/technotes/tools/findingclasses.html).
For the Java boot classpath, the `scala` launcher justs puts everything in `lib/` on it.
This is not the right thing to do because it makes available classes not on the user's classpath.