Print out all methods in program with print statements

Question

Does anyone know how I would be able to print out all the methods in a program. For example:
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 ");
}This code would produce 5 print statements for the 4 methods:
1 Main method
2 Print method
3 Print method
4 Println method
5 Print method
Does anyone know I can write the could to accomplish this? Right now I am experimenting with try/catch statements. Any help is greatly appreciated.

Answer 1

It seems to me the easiest approaches (other than using a tool someone else has already written) are:
1) Compile the source, and then use BCEL
2) Try some regular expressions; it won't be perfect but maybe you can tweak it until it's good enough.
3) Parse the source, and examine the parse tree.
1 and 3 will give you much better results, but require you to use outside libraries (or write a parser yourself).
You can do 2 using standard stuff from the JDK, but you may spend a lot of trial-and-error gettng the regexps right.
Which you choose will depend a lot on what the prof giving the assignment allows.
Also he may have some particular kind of solution in mind -- did he say anything?
If you're not sure what to do, ask your prof for clarification.