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Program 1
 

import java.io.*;

class NumberProducer{

 public static void main(String[] args) throws IOException {
  DataOutputStream dout = new DataOutputStream(
                            new FileOutputStream
                             (new File("numbers.dat")));

  int i = 5;
  boolean b = false;

  dout.writeInt(i);
  dout.writeBoolean(b);

  dout.close();
 }
}