Java code for a level order directory traversal with a LinkedList

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/*                                                                            */
/*                                                    FILE: StandardList.java */
/*                                                                            */
/*  Level order directory traversal in Java                                   */
/*  =======================================                                   */
/*                                                                            */
/*  V1.00   27-JUL-2009   Te          http://www.heimetli.ch                  */
/*                                                                            */
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import java.io.* ;
import java.util.* ;

/**
 * This class implements a level order traversal of a directory tree.
 * It uses the LinkedList collection class to store the Files to be processed.
 */
public class StandardList
{
   // The list of Files to be processed
   LinkedList<File> list ;

   /**
    * Initializes the list
    */
   public StandardList()
   {
      list = new LinkedList<File>() ;
   }

   /**
    * Traverses the directory tree in level order (breadth first)
    * @param file the first element to be processed
    */
   public void traverse( File file )
   {
      // Add the element to the list
      list.add( file ) ;

      // Loop until the list is empty
      while( list.size() > 0 )
      {
         // Remove the first element from the list
         file = list.remove() ;

         // Print the name of the entry
         System.out.println( file ) ;

         // Check if it is a directory
         if( file.isDirectory() )
         {
            // Get a list of all the entries in the directory
            String entries[] = file.list() ;

            // Ensure that the list is not null
            if( entries != null )
            {
               // Loop over all the entries
               for( String entry : entries )
	       {
		  // Add them to the list
                  list.add( new File(file,entry) ) ;
	       }
            }
	 }
      }
   }

   /**
    * The program starts here.
    * @param args The arguments from the command line
    */
   public static void main( String args[] )
   {
      // Create an object of this class
      StandardList sl = new StandardList()) ;

      if( args.length == 0 )
      {
         // If there are no arguments, traverse the current directory
         sl.traverse( new File(".") ) ;
      }
      else
      {
         // Else process every argument sequentially
         for( String arg : args )
         {
            sl.traverse( new File(arg) ) ;
         }
      }
   }
}