/** EachInDirectory.java calls a callback with the name of each file in a given directory
    By Rowland http://home.comcast.net/~rowland3/
**/

import java.io.*;

class EachInDirectory {
    public EachInDirectory(String dirSpec) {
	File f= new File(dirSpec);
	String files[]= f.list();
	for (int i=0; i<files.length; i++)
	    try {
		String fileSpec= dirSpec+ f.separator+ files[i];
		callback(fileSpec);
	    }  catch (Exception E) {
		System.err.println("ERR EachInDirectory "+ files[i]+ ": "+ E.getMessage());
	    }
    }

    /** callback() - override in dervied class.  called with each file name in directory.
	Return false to stop scanning directory. **/
    protected boolean callback(String fileSpec) throws Exception {
	System.out.println(fileSpec);
	return true;
    }

    /** main() test routine.  Pass directory on command line. **/
    public static void main(String args[]) {
	new EachInDirectory(args[0]);
    }
}