forEach in scala shows expected: Consumer[_ >:Path] actual: (Path) => Boolean

Question

Wrong syntax problem in recursively deleting scala files

Files.walk(path, FileVisitOption.FOLLOW_LINKS)
    .sorted(Comparator.reverseOrder())
    .forEach(Files.deleteIfExists)

Answer 1

The issue is that you're trying to pass a scala-style function to a method expecting a java-8-style function. There's a couple libraries out there that can do the conversion, or you could write it yourself (it's not complicated), or probably the simplest is to just convert the java collection to a scala collection that has a foreach method expecting a scala-style function as an argument:

import scala.collection.JavaConverters._

Files.walk(path, FileVisitOption.FOLLOW_LINKS)
        .sorted(Comparator.reverseOrder())
        .iterator().asScala
        .foreach(Files.deleteIfExists)