import java.io.*;
import java.util.zip.*;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.CheckedOutputStream;
import java.io.IOException;

class CheckedWrite {
	public static void main(String args[]) {
		try {
			FileOutputStream fout = new FileOutputStream("testfile1.txt");
			Adler32 adler = new Adler32();
			CheckedOutputStream checkout = new CheckedOutputStream(fout, adler);
			FileInputStream fin = new FileInputStream("testfile.txt");
			int length;
			for (int c = fin.read(); c != -1; c = fin.read()) {
				checkout.write(c);
			}
			System.out
			.println("content of a file successfully written in another file using Write(int b) method.");
			long value = checkout.getChecksum().getValue();
			System.out.println("The Adler32 Checksum value : " + value);
		} catch (IOException e) {

			System.out.println("IOException : " + e.getMessage());
		}

	}
}