import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegExpDemo {


    public static void main(String[] args) {
        String[] data = {
                "[Google](http://www.google.com)",
                "[Facebook](http://www.facebook.com)",
                "[World Wide Web Consortium (W3C)](http://www.w3.org)"
        };


        Pattern pattern = Pattern.compile("\\[(.+?)\\]\\((\\S+?)\\)", Pattern.UNICODE_CASE);
        Matcher matcher = null;
        for (String str: data) {
            matcher = pattern.matcher(str);
            while (matcher.find()) {
                System.out.println(String.format("Name: %s , URL: %s", matcher.group(1), matcher.group(2)));
            }
        }
    }

}

OUTPUT:

Name: Google , URL: http://www.google.com
Name: Facebook , URL: http://www.facebook.com
Name: World Wide Web Consortium (W3C) , URL: http://www.w3.org

这种简单的事交给grep，awk，sed可能一样就搞定了。

grep -P "\[\S+\].*?\(\S+\)" input.txt

简单的命令多学习下shell吧。

推荐看看书：mastering regular expression 3rd edition