Groovy write to file (newline) - file-io

Question

I created a small function that simply writes text to a file, but I am having issues making it write each piece of information to a new line. Can someone explain why it puts everything on the same line?
Here is my function:
public void writeToFile(def directory, def fileName, def extension, def infoList) {
File file = new File("$directory/$fileName$extension")
infoList.each {
file << ("${it}\n")
}
}
The simple code I'm testing it with is something like this:
def directory = 'C:/'
def folderName = 'testFolder'
def c
def txtFileInfo = []
String a = "Today is a new day"
String b = "Tomorrow is the future"
String d = "Yesterday is the past"
txtFileInfo << a
txtFileInfo << b
txtFileInfo << d
c = createFolder(directory, folderName) //this simply creates a folder to drop the txt file in
writeToFile(c, "garbage", ".txt", txtFileInfo)
The above creates a text file in that folder and the contents of the text file look like this:
Today is a new dayTomorrow is the futureYesterday is the past
As you can see, the text is all bunched together instead of separated on a new line per text. I assume it has something to do with how I am adding it into my list?

Answer 1

As #Steven points out, a better way would be:
public void writeToFile(def directory, def fileName, def extension, def infoList) {
new File("$directory/$fileName$extension").withWriter { out ->
infoList.each {
out.println it
}
}
}
As this handles the line separator for you, and handles closing the writer as well
(and doesn't open and close the file each time you write a line, which could be slow in your original version)

Answer 2

It looks to me, like you're working in windows in which case a new line character in not simply \n but rather \r\n
You can always get the correct new line character through System.getProperty("line.separator") for example.

Answer 3

I came across this question and inspired by other contributors. I need to append some content to a file once per line. Here is what I did.
class Doh {
def ln = System.getProperty('line.separator')
File file //assume it's initialized
void append(String content) {
file << "$content$ln"
}
}
Pretty neat I think :)

Answer 4

Might be cleaner to use PrintWriter and its method println.
Just make sure you close the writer when you're done

Answer 5

#Comment for ID:14.
It's for me rather easier to write:
out.append it
instead of
out.println it
println did on my machine only write the first file of the ArrayList, with append I get the whole List written into the file.
Kindly anyway for the quick-and-dirty-solution.