Работа с файлами с помощью FileInputStream и FileOutputStream

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyFile {
    public static void main(String[] args) {
        int i;

        FileInputStream fin;
        FileOutputStream fout;

        if (args.length != 2) {
            System.out.println("Usage: CopyFile From To.");
            return;
        }

        try {
            fin = new FileInputStream(args[0]);
        } catch (FileNotFoundException exc) {
            System.out.println("Input file not found.");
            return;
        }

        try {
            fout = new FileOutputStream(args[1]);
        } catch (FileNotFoundException exc) {
            System.out.println("Error opening output file.");
            try {
                fin.close();
            } catch (IOException exc2) {
                System.out.println("Error closing input file.");
            }
            return;
        }

        try {
            do {
                i = fin.read();
                if (i != -1) fout.write(i);
            } while (i != -1);
        } catch (IOException exc) {
            System.out.println("Fi;e error.");
        }

        try {
            fin.close();
        } catch (IOException exc) {
            System.out.println("Error closing input file.");
        }

        try {
            fout.close();
        } catch (IOException exc) {
            System.out.println("Error closing output file.");
        }
    }
}