Over a million developers have joined DZone.

Groovy Goodness: Extra Methods for NIO Path

· Java Zone

Microservices! They are everywhere, or at least, the term is. When should you use a microservice architecture? What factors should be considered when making that decision? Do the benefits outweigh the costs? Why is everyone so excited about them, anyway?  Brought to you in partnership with IBM.

Groovy adds a lot of extra methods to the File object to work with the contents or find and filter files in a directory. These methods are now also added to the java.nio.file.Path class since Groovy 2.3.

import java.nio.file.*

final Path newFile = Paths.get('output.txt')
if (Files.exists(newFile)) {
    Files.delete(newFile)
}

// Different ways to add content.
newFile.write 'START'
newFile.write System.getProperty('line.separator')
newFile << 'Just a line of text'
newFile.withWriterAppend { writer ->
    writer.println()
    writer.println 'END'
}
// Read contents.
final Path readFile = Paths.get('output.txt')

assert readFile.readLines().join(';') == 'START;Just a line of text;END'
assert readFile.filterLine { it.contains('text') }.toString().normalize() == 'Just a line of text\n'
// Work with Path objects,
// like with File GDK extensions with
// eachFile, eachDir, eachFileRecursive...
final Path root = Paths.get('.')
def paths = root.eachFileMatch(~/.*\.txt$/) {
    assert it.toFile().name == 'output.txt'
}

Code written with Groovy 2.3.

Discover how the Watson team is further developing SDKs in Java, Node.js, Python, iOS, and Android to access these services and make programming easy. Brought to you in partnership with IBM.

Topics:

Published at DZone with permission of Hubert Klein Ikkink, DZone MVB. See the original article here.

Opinions expressed by DZone contributors are their own.

The best of DZone straight to your inbox.

SEE AN EXAMPLE
Please provide a valid email address.

Thanks for subscribing!

Awesome! Check your inbox to verify your email so you can start receiving the latest in tech news and resources.
Subscribe

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}