import java.io.*;
import java.util.*;
 
public class RecursiveFileListAttemp1 {
    public static void main(String[] args) {
        File f = new File("C:\\");  
        search(f);
    }

    public static void search(File f) {  
        if ( !f.exists() ) return; 
        String name = f.getName(); 
        if ( f.isDirectory() ) {
        File[] files = f.listFiles();
        for( int i = 0 ; i < files.length; i++ ) {
        search( files[i] );
            }
        }
    }
}

	public static void main(String[] args) {
        for(File file : File.listRoots()){ // listRoots() method return list of drives. array of File type.
        	search(file);
        }
    }
 
    public static void search(File f) {  
        if ( !f.exists() ) return; 
        String name = f.getName();
        System.out.println(name);
        if ( f.isDirectory() ) {
        File[] files = f.listFiles();
        for( int i = 0 ; i < files.length; i++ ) {
        search( files[i] );
            }
        }
    }

     public static void search(File f) {
        if ( !f.exists() ) return; 
        String name = f.getName();
        System.out.println(name);
        if ( f.isDirectory() ) {
        File[] files = f.listFiles();
        if (files != null) {
        for( int i = 0 ; i < files.length; i++ ) {
        search( files[i] );
        } if (f.length() <= 1) return;
		}
 
 
            }
        }