Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

regular expression back references?

Posted on 2002-04-04
4
247 Views
Last Modified: 2010-03-31
stupid question - I am using String's replaceAll(pattern, replacement) how do I reference the captured groups "(whatever)" from the pattern in the replacement?  \1 doesn't work (and the documentation says that's what it is) and neither does \\1

thanks
0
Comment
Question by:_D_
  • 2
4 Comments
 

Author Comment

by:_D_
ID: 6920218
ok never mind that - figured it out, different question though:

what I need to do is convert the string to "Title Case", ie first letter of every word capitalized, what I have for the replace so far is:

replaceAll("\\b(\\w)","$1")

which just relaces each first character with the same one - how to I capitalize that back reference?  Or do I need to do this is some completely different way?

thanks
0
 
LVL 9

Expert Comment

by:Venci75
ID: 6920351
.
0
 
LVL 19

Accepted Solution

by:
Jim Cakalic earned 50 total points
ID: 6922112
The most straightforward way -- without using regular expressions -- is probably something like this:

    public String toTitleCase(String s) {
        char[] chars = s.toCharArray();
        int length = chars.length;
        boolean fixNext = true;
        for (int i = 0; i < length; ++i) {
            if (Character.isWhitespace(chars[i])) {
                fixNext = true;
            } else if (fixNext) {
                chars[i] = Character.toTitleCase(chars[i]);
                fixNext = false;
            }
        }
        return new String(chars);
    }

Best regards,
Jim Cakalic
0
 

Author Comment

by:_D_
ID: 6933488
no quite what I was looking for, but I don't see a better way
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
custom annotations 9 42
servlet doXXX methods 3 62
Spring Framework HTTPSession management 1 45
Tomcat: Unable to run tomcat service. 2 23
For beginner Java programmers or at least those new to the Eclipse IDE, the following tutorial will show some (four) ways in which you can import your Java projects to your Eclipse workbench. Introduction While learning Java can be done with…
In this post we will learn how to connect and configure Android Device (Smartphone etc.) with Android Studio. After that we will run a simple Hello World Program.
Viewers learn about the third conditional statement “else if” and use it in an example program. Then additional information about conditional statements is provided, covering the topic thoroughly. Viewers learn about the third conditional statement …
This tutorial will introduce the viewer to VisualVM for the Java platform application. This video explains an example program and covers the Overview, Monitor, and Heap Dump tabs.

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question