Help using regex to change strings

Question

I'm writing a utility to move sub folders from computer to computer. I am trying to get regex to work so a string like "d:\\NewScans\\22102\\7-17" would become "\\\\inv108\\data\\users\\clipper\\scan\\22102\\7-17"
so basically "d:\\NewScans\\" needs to become
"\\\\inv108\\data\\users\\clipper\\scan\\" Here is the program I wrote taht accepts the input and out put directories like:
java Paper mover d:\\NewScans \\\\inv108\\data\\users\\clipper\\scan
This is the code I wrote but it doesn't work:
/** Created to move files from a remote bureau to MPCB */
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.io.OutputStream.*;
import java.util.regex.*;
public class PaperMover{
     private File start_path;
     private File destination;
     public static void main(String[] args){
          if(args[0] != null){
               PaperMover m = new PaperMover(args[0].trim(), args[1].trim());
               m.move_papers();
          else{
               System.out.println("no input directory");
               System.exit(0);
     public PaperMover(String path, String destination){
          start_path = new File(path);
          this.destination = new File(destination);
     public void move_papers(){
          File[] listing = start_path.listFiles();
          File temp;
          String pat = start_path.getAbsolutePath();
          Pattern P = Pattern.compile(pat);
          for(int i = 0; i<listing.length; i++){
               //get the directories IE 20123
               try{
                    if(listing.isDirectory()){
                         String t = listing[i].getAbsolutePath();
                         System.out.println(t);
                         String t2 = P.matcher(t).replaceAll(destination.getAbsolutePath());
                         System.out.println(t2);
I get string t and t2 to be equal.

Answer 1

I found my troubles!!