[RESOLVED] Java Program Copy Files

[Backslash]

I need to create a program that copies files from a directory to another directory. Then the copied files in the destination directory are to be renamed to their SHA1 hash code. Also, at the same time a new text file is created in the destination directory that contains the file names of the copied files with their SHA1 has code.
Right now I copying contents from the source directory to the destination directory works.
I am really confused and need help.
Here's what I have so far:

import java.io.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

public class Main
{
    public static void main(final String[] args)throws IOException
    {
    	Main cd = new Main();
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		System.out.println("Enter the source directory or file name : ");
		String source = in.readLine();
		File src = new File(source);
		System.out.println("Enter the destination directory or file name : ");
		String destination = in.readLine();
		File dst = new File(destination);
		cd.copyDirectory(src, dst);

        File f;
        f = new File("manifest.txt");
        if(!f.exists())
        {
            f.createNewFile();
        }

	}

	public void copyDirectory(File srcPath, File dstPath) throws IOException{
		if (srcPath.isDirectory())
		{
			if (!dstPath.exists())
			{
				dstPath.mkdir();
			}

			String files[] = srcPath.list();
			for(int i = 0; i < files.length; i++)
			{
				copyDirectory(new File(srcPath, files[i]), new File(dstPath, files[i]));
			}
		}
		else
		{
			if(!srcPath.exists())
			{
				System.out.println("File or directory does not exist.");
				System.exit(0);
			}
			else
			{
				InputStream in = new FileInputStream(srcPath);
		        OutputStream out = new FileOutputStream(dstPath);

				// Transfer bytes from in to out
		        byte[] buf = new byte[1024];
				int len;
		        while ((len = in.read(buf)) > 0) {
					out.write(buf, 0, len);
				}
				in.close();
		        out.close();
			}
		}
		System.out.println("Directory copied.");
	}
}

[dlorde]

<sigh> So what is your question? Explain what you are confused about and exactly what you need help with.

You may find this useful: How To Ask Questions the Smart Way.

Vague and nebulous is the beginning of all things, but not their end...
K. Gibran

[Backslash]

I need help on how to generate SHA1 hash code and rename it from the copied file names.
I also need help on how to paste these filenames that I copied into a txt file with their SHA1 hash code. (in my code it's manifest.txt)

[postmortem]

[sarcasm] well all you need to find another piece of code online and combine with one "that you got" [/sarcarsm]

[Backslash]

[sarcasm] well all you need to find another piece of code online and combine with one "that you got" [/sarcarsm]

i asked for help with not an opinion...

[postmortem]

i asked for help with not an opinion...

seriously,
this should be enough:
http://en.wikipedia.org/wiki/SHA1#SHA-1_pseudocode

you have pseudo code, it is fairly trivial to write code from it; if it is not for you, then you'll learn a lot during the process of conversion to real code.

[Backslash]

seriously,
this should be enough:
http://en.wikipedia.org/wiki/SHA1#SHA-1_pseudocode

you have pseudo code, it is fairly trivial to write code from it; if it is not for you, then you'll learn a lot during the process of conversion to real code.

Thank You!