import java.io.*;

public class CopyFile2 {
    public static void main(String[] args) throws IOException
    {
        int i;

        // First, confirm that both files has been specified.
        if(args.length != 2) {
            System.out.println("Usage: CopyFile from to");
            return;
        }

        // Open and manage two files via the try statement.
        try(FileInputStream fin = new FileInputStream(args[0]);
            FileOutputStream fout = new FileOutputStream(args[1]))
        {

            do {
                i = fin.read();            // Read bytes from one file
                if(i != -1) fout.write(i); // and write them to another
            } while(i != -1);

        } catch(IOException exc) {
            System.out.println("I/O Error: " + exc);
        }
    }
}