/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		//String[] URLs = new String[] { "http://f...content-available-to-author-only...o.com/blah_blah", "http://f...content-available-to-author-only...o.com/blah_blah/", "http://f...content-available-to-author-only...o.com/blah_blah_(wikipedia)", "http://f...content-available-to-author-only...o.bar?q=Spaces should be encoded" };
		//String[] URLs = new String[] { "[20:56] <@Котофеич> http://s...content-available-to-author-only...l.com/pics/pics_original/3/4/2/5825243.jpg" }; 
		// The URL above is invalid since it contains consecutive dots
		String[] URLs = new String[] { "[20:56] <@Котофеич> http://s...content-available-to-author-only...l.com/pics/pics_original/3/4/2/5825243.jpg" };
		Pattern REGEX = Pattern.compile("(?i)\\b(?:(?:https?|ftp)://)(?:\\S+(?::\\S*)?@)?(?:(?!(?:10|127)(?:\\.\\d{1,3}){3})(?!(?:169\\.254|192\\.168)(?:\\.\\d{1,3}){2})(?!172\\.(?:1[6-9]|2\\d|3[0-1])(?:\\.\\d{1,3}){2})(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}(?:\\.(?:[1-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))|(?:(?:[a-z\\u00a1-\\uffff0-9]-*)*[a-z\\u00a1-\\uffff0-9]+)(?:\\.(?:[a-z\\u00a1-\\uffff0-9]-*)*[a-z\\u00a1-\\uffff0-9]+)*(?:\\.(?:[a-z\\u00a1-\\uffff]{2,}))\\.?)(?::\\d{2,5})?(?:[/?#]\\S*)?\\b");
		for (String url : URLs) {
            Matcher matcher = REGEX.matcher(url);
            if (matcher.find()) {
                System.out.println(matcher.group());
              }
 
        }
 
    }
}

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