File Input Output Java


            import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
public class Util{
   public static final int BUFFER_SIZE = 4096;
    public void write(File dest, InputStream in) {
        FileChannel channel = null;
        try {
          channel = new FileOutputStream(dest).getChannel();
        } catch (FileNotFoundException e) {
          System.out.println(e);
        }
        try {
          int byteCount = 0;
          byte[] buffer = new byte[BUFFER_SIZE];
          int bytesRead = -1;
          while ((bytesRead = in.read(buffer)) != -1) {
            ByteBuffer byteBuffer = ByteBuffer.wrap(buffer, 0, bytesRead);
            channel.write(byteBuffer);
            byteCount += bytesRead;
          }
        } catch (IOException e) {
          System.out.println(e);
        } finally {
          try {
            if (channel != null) {
              channel.close();
            }
            if (in != null) {
              in.close();
            }
          } catch (IOException e) {
            e.printStackTrace();
          }
        }
      } 
}