import java.io.*;

public class BinaryInputDemo
{
  public static void main(String[] args)
  {
     try
     {
         ObjectInputStream inputStream = 
           new ObjectInputStream(new FileInputStream("numbers.dat"));
         int n;
         System.out.println("Reading the nonnegative integers");
         System.out.println("in the file numbers.dat.");
         n = inputStream.readInt( );
         while (n >= 0)
         {
             System.out.println(n);
             n = inputStream.readInt( );
         }
         
         System.out.println("End of reading from file.");
         inputStream.close( );
     }
     catch(FileNotFoundException e)
     {
         System.out.println("Cannot find file numbers.dat.");
     }
     catch(IOException e)
     {
         System.out.println("Problem with input from file numbers.dat.");
     }
  }
}