[RESOLVED] Java Program Copy Files

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:

Code:

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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.");
        }
}

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<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

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)

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

Quote:

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Originally Posted by postmortem

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

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i asked for help with not an opinion...

Quote:

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Originally Posted by Backslash

i asked for help with not an opinion...

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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.

Quote:

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Originally Posted by postmortem

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.

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Thank You!