Source Code : ObjectInputStream, ObjectOutputStream and java.io.Serializable

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ObjectInputStream, ObjectOutputStream and java.io.Serializable

  

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

class Engine implements Serializable {
  private int numCylinders;

  Engine(int numCylinders) {
    this.numCylinders = numCylinders;
  }

  int getNumCylinders() {
    return numCylinders;
  }
}

class Car implements Serializable {
  private int numTires;

  private Engine e;

  private String name;

  Car(String name, int numTires, Engine e) {
    this.name = name;
    this.numTires = numTires;
    this.e = e;
  }

  int getNumTires() {
    return numTires;
  }

  Engine getEngine() {
    return e;
  }

  String getName() {
    return name;
  }
}

class Main {
  public static void main(String[] args) throws Exception {
    Car c1 = new Car("Some car", 4, new Engine(6));

    ObjectOutputStream oos = null;

    FileOutputStream fos = new FileOutputStream("car.ser");
    oos = new ObjectOutputStream(fos);

    oos.writeObject(c1);
    ObjectInputStream ois = null;

    FileInputStream fis = new FileInputStream("car.ser");
    ois = new ObjectInputStream(fis);

    Car c2 = (Car) ois.readObject();

    System.out.println("Number of tires = " + c2.getNumTires());
    System.out.println("Number of cylinders = " + c2.getEngine().getNumCylinders());
    System.out.println("Name = " + c2.getName());
  }
}

   
    
  

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