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From: Robert Klemme <shortcutter@googlemail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Libraries for sysadmins?
Date: Fri, 4 Mar 2016 18:06:40 +0100
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I would look into using JRuby, maybe also look into Groovy (not sure how 
much alive the latter is these days).

On 04.03.2016 16:13, Stefan Ram wrote:
> Elena <egarrulo@gmail.com> writes:
>> processing text files line by line
>
>    Writing lines to a text file:
>
> new java.io.FileWriter( "c:\\example.txt" ).
> append( "alpha\n" ).close();

In (J)Ruby:

File.open("example.txt", "a") {|io| io.puts "alpha"}

>    Reading a text file line by line (not tested):
>
> final java.util.Scanner scanner
> = new java.util.Scanner( new java.io.File( "file.txt" ));
> while( scanner.hasNextLine() )
> { final java.lang.String line = scanner.nextLine();

In (J)Ruby:

File.foreach "file.txt" do |line|
   # whatever
end

>> filtering collections
>
>    (not tested):
>
> java.util.Arrays.asList( 1, 2, 3 ).stream().
> filter( x -> "x >= 2 )

Again, in (J)Ruby:

[1,2,3].select {|x| x >= 2}

(Not exactly the same, but can easily be made to if need be.)

Kind regards

	robert


-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/