import java.io.*;

public class ByteArrayExample{
	public static void main(String[] args) {
		try{
			BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
			System.out.println("Enter File name: ");
			String str = bf.readLine();
			File file = new File(str); 
			//File length
			int size = (int)file.length(); 
			if (size > Integer.MAX_VALUE){
				System.out.println("File is to larger");
			}
			byte[] bytes = new byte[size]; 
			DataInputStream dis = new DataInputStream(new FileInputStream(file)); 
			int read = 0;
			int numRead = 0;
			while (read < bytes.length && (numRead=dis.read(bytes, read, bytes.length-read)) >= 0) {
				read = read + numRead;
			}
			System.out.println("File size: " + read);
			// Ensure all the bytes have been read in
			if (read < bytes.length) {
				System.out.println("Could not completely read: "+file.getName());
			}
		}
		catch (Exception e){
			e.getMessage();
		}
	}
}