package inputOutput;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Properties;

/**
 *  This class finds the current directory, gets a list of all
 *  the files/directories in the current directory, separates
 *  the files from the directories, and prints out the two lists.
 */
public class DirectoryLister
{
    public static void main(String[] args)
    {
        // Get current directory
        File dir = new File( System.getProperty("user.dir") );
        // Print out its contents
        printDirectoryContents(dir);
    }
    
    public static void printDirectoryContents(File dir)
    {
        if (!dir.isDirectory())
            return;
            
        try
        {
            System.out.println("Directory : '" + 
                                dir.getCanonicalPath() + "'");
            // Get the list of directory contents
            String[] contents = dir.list();
            // Go through the contents, separating out the files vs dirs.
            ArrayList<String> dirs  = new ArrayList<String>();
            ArrayList<String> files = new ArrayList<String>();
            for (int i = 0; i < contents.length; i++)
            {
                File file = new File(contents[i]);
                if (file.isFile())
                    files.add(contents[i]); // Add file name
                else if (file.isDirectory())
                    dirs.add(contents[i]); // Add dir name
            }
            // Print out the list of directories
            System.out.println("Directories:");
            Iterator<String> it = null;
            for (it = dirs.iterator(); it.hasNext(); )
            {
                String name = it.next();
                System.out.println(" " + name);
            }
            // Print out the list of files
            System.out.println("Files:");
            for (it = files.iterator(); it.hasNext(); )
            {
                String name = it.next();
                System.out.println(" " + name);
            }
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
    }
}