Java program to list all files

This post is about a program that will be able to list all files in your computer's hard disk. This code uses java.io package for this purpose. Here I have use File class to list all the drives of your hard disk using listRoots() function. Then I have defined a recursive function that will go on till all the listings are over. The recur function takes in a File as parameter and if it is a file the it displays its absolute path and if it is a directory then again it lists all its contents and for each of its contents it calls the recur function recursively. Here is the code for you :
import java.io.*;
public class FileList {

    static void recur(File f1){
        if (f1.isFile()){
            System.out.println(f1.getAbsolutePath()); //displays path for a file
            return;
        }
        else{
            File f[]=f1.listFiles();  //lists all contents if a directory
            for (int j = 0; j<f.length; j++)
                try{
                recur(f[j]);  //calls recur for each content of directory
                }catch(Exception e){e.printStackTrace();}
        }
    }
   
    public static void main(String[] args){
        File []A=File.listRoots();  //lists all drives
           try{
               for(int i=0;i<A.length;i++)
                recur(A[i]);  //calls recur for each drive
            }catch(Exception e){e.printStackTrace();}       
    }
}