Java ObjectOutputStream class

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class Main {
   public static void main(String args[]) {

      // Object serialization

      try (ObjectOutputStream objOStrm = new ObjectOutputStream(new FileOutputStream("serial"))) {
         MyClass object1 = new MyClass("Hello", -7, 2.7e10);
         System.out.println("object1: " + object1);

         objOStrm.writeObject(object1);/*from   ww w  .  j a  v  a2 s . c  o m*/
      } catch (IOException e) {
         System.out.println("Exception during serialization: " + e);
      }

      // Object de-serialization

      try (ObjectInputStream objIStrm = new ObjectInputStream(new FileInputStream("serial"))) {
         MyClass object2 = (MyClass) objIStrm.readObject();
         System.out.println("object2: " + object2);
      } catch (Exception e) {
         System.out.println("Exception during deserialization: " + e);
      }
   }
}

class MyClass implements Serializable {
   String s;
   int i;
   double d;

   public MyClass(String s, int i, double d) {
      this.s = s;
      this.i = i;
      this.d = d;
   }

   public String toString() {
      return "s=" + s + "; i=" + i + "; d=" + d;
   }
}