Print out all methods in a program...

Question

I am looking for a way to write a piece of code that recognizes methods, for instance if I were to put this program through the code:
class bd220p1 {
     public static void main(String args[])  {
          int lightspeedi,lightspeedm;
          long days;
          long seconds;
          long distancei;
          long distancem;
          // approximate speed of light in miles per second
          lightspeedi = 186000;
            // approximate speed of light in Kilometers per second
          lightspeedm = 300000;
          days = 1000; // specify number of days here
          seconds = days * 24 * 60 * 60; // convert to seconds
          distancem = lightspeedm * seconds; // compute distance in English system
          distancei = lightspeedi * seconds;// compute distance in Metric system
          System.out.print("In " + days);
          System.out.print(" days light will travel about ");
          System.out.println(distancei + " miles and");
          System.out.print(distancem + " Kilometers ");
}The code would locate 5 methods and print them out like so:
1.main method
2. print method
3. print method
4. println method
5. print method
So far I havent been able to find a way to do this, so any help would be appreciated. If I am vague or unclear on what I am trying to do please let me know.

Answer 1

Regular expressions are rules for creating (and thus matching) strings of characters. So for example this:
^a*dogb+$matches "dogb", or "adogb", or "aaaaaaaadogbbbbbbb", or "aaaaadogbcat".
There's been a regular expression library in java since jdk 1.4. Look at java.util.regex, or some tutorials. It's not something you can sum up in a couple lines; there are a bunch of little rules to learn and to apply.
It may be easier to start out with Perl. Perl is an interpreted language with regexps built in, so it's a lot faster to fiddle around with them in perl. So for example (if you're using a real OS like linux, with Perl installed) you can type this at the command line:
$ perl -ne 'print (/YOUR REGEXP HERE/ ? "yes\n" : "no\n");'and then type in strings on the console and see if the regexp matches them -- a quick way to experiment and learn.