/************************************************
 *Demonstrates use of the class File with binary files.
 ************************************************/
import java.io.*;

public class FileClassDemo1
{
    public static void main(String[] args)
    {
        String name = null;
        File fileObject = null;
     
        System.out.println("I will show you the first string");
        System.out.println("in a binary file you name.");
        System.out.println("The first data item in the file");
        System.out.println("must be a string.");
    
        System.out.println("Enter file name:");
        name = SavitchIn.readLineWord(); 
        fileObject = new File(name);
        while (( ! fileObject.exists()) || ( ! fileObject.canRead()))
        {
           if ( ! fileObject.exists()) 
              System.out.println("No such file");
           else if ( ! fileObject.canRead())
              System.out.println("That file is not readable.");
           System.out.println("Enter file name again:");
           name = SavitchIn.readLineWord(); 
           fileObject = new File(name);
        }

        try
        {
           DataInputStream fileInput = 
                  new DataInputStream(new FileInputStream(name));
           System.out.println("The first string in the file is:");
           String firstString = fileInput.readUTF();
           System.out.println(firstString);

           fileInput.close();
       }
       catch(IOException e)
       {
          System.out.println("Problem reading from file.");
       }
    }
}