Write a java program which will save the Serializable sub class object into a file?

import java.io.*;
class serp {
 public static void main(String[] args) throws Exception {
  Emp eo = new Emp();
  eo.setEmpno(100);
  eo.setEname("KVR");
  eo.setSal(10000.00 f);
  FileOutputStream fos=new FileOutputStream("employee");
  ObjectOutputStream oos = new ObjectOutputStream(fos);
  oos.writeObject(eo);
  System.out.println("EMPLOYEE OBJECT SAVED SUCCESSFULLY");
  oos.close();
  fos.close();
 }
}

Output:
EMPLOYEE OBJECT SAVED SUCCESSFULLY...