UrbanPro

Learn Java Training from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Search in

Explain the purpose of the ObjectInputStream and ObjectOutputStream classes.

Asked by Last Modified  

2 Answers

Learn Java

Follow 2
Answer

Please enter your answer

The ObjectInputStream and ObjectOutputStream classes in Java are part of the Java Input/Output (I/O) system and are used for reading and writing objects, respectively. These classes are primarily designed for object serialization, which is the process of converting an object's state into a byte stream...
read more

The ObjectInputStream and ObjectOutputStream classes in Java are part of the Java Input/Output (I/O) system and are used for reading and writing objects, respectively. These classes are primarily designed for object serialization, which is the process of converting an object's state into a byte stream and reconstructing the object from that byte stream. Serialization is essential for scenarios like storing objects in files, sending objects over a network, or saving object states between different program executions.

  1. ObjectOutputStream:

    • Purpose: This class is used to serialize objects. It takes an object and writes its state to a stream in a platform-independent and standardized format.
    • Methods: The key method is writeObject(Object obj), which writes the specified object to the underlying stream.
    import java.io.Serializable;

    public class MyClass implements Serializable {
    // Class members and methods
    }

  • ObjectInputStream:

    • Purpose: This class is used to deserialize objects. It reads a byte stream and reconstructs the original object, restoring its state.
    • Methods: The primary method is readObject(), which reads the next object from the input stream and returns it as a generic Object. The caller must cast the returned object to its appropriate type.
    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("data.ser"));
    MyClass obj = (MyClass) ois.readObject();
    ois.close();

It's important to note that for an object to be serializable, its class must implement the Serializable interface. This interface acts as a marker, indicating that the class can be serialized. If a class does not implement Serializable, an exception (NotSerializableException) will be thrown at runtime.

Here's a simple example of a serializable class:

java
import java.io.Serializable;

public class MyClass implements Serializable {
// Class members and methods
}

These classes are powerful tools for handling object persistence and communication in Java, allowing objects to be easily saved, transmitted, and reconstructed.

 
 
 
read less
Comments

Wroking in IT industry from last 15 years and and trained more than 5000+ Students. Conact ME

ObjectInputStream reads objects, ObjectOutputStream writes objects; facilitate object serialization/deserialization in Java.
Comments

Related Questions

What is IBM RAD(Rational Application Developer)?
RAD means Rational Application Developer for WebSphere Software accelerates the development and deployment of Java, Java EE, Web 2.0, mobile, OSGi, portal and service-oriented architecture (SOA) applications....
Ashish
Is JAVA training only for technical students or a non-technical student also may join?
Any Body can Learn Programming Language.It All depends upon the learning of basics and all.Basics actually makes the thing different.
Vikrant
0 0
6

How to prepare for CORE JAVA for Android Developement?

Core Java is required for basic understanding of inheritance , AWT with button action programs, library usage etc then after u can genrate your logic with additional topics of Android
Rishabh
0 0
6
What are the technologies to learn for a Java backend developer?
For a Java Backend Developer learn 1. Java EE or Spring Framework 2. DBMS(Database Management System) 3. Spring Boot 4. Web Services 5. ORM( Object-Relational Mapping) 6. Version Control Systems(like...
Ankita
0 0
5

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Observer Pattern in Java.
As I was going through the different source code files of the Java Util package, I found the implementation of the Observer Pattern ( see the Gang of Four books for more information on this pattern) in...

Tips for Entry Level Java Job Seeker
3 steps you should take to make a break as a Java developer: Step 1: Invest in improving your job hunting skills encompassing interviewing, networking, and resume writing skills. Step 2: Keep applying...
A

Akshay Shende

1 0
0

jOOQ 3.10 Supports JPA Attribute Converter
One of the cooler hidden features in jOOQ is the JPADatabase, which allows for reverse engineering a pre-existing set of JPA-annotated entities to generate jOOQ code. For instance, you could write these...

Demand of java in industry
Java is one of the widest use language in the industry all around the world As in software market more than 80% software, platform developed using java. Java comes in three flavours:- j2se for window based...

Prashant Tomer

0 0
0

Try to clear up the basics, if basics are clear then you can go ahead with any difficult problem
Hey guys, To all the students i just want to convey that just clear up your basics so that they can help you solve anyu problem and you would achieve a great success. Regards, Ishani Chakraborty

Recommended Articles

In the domain of Information Technology, there is always a lot to learn and implement. However, some technologies have a relatively higher demand than the rest of the others. So here are some popular IT courses for the present and upcoming future: Cloud Computing Cloud Computing is a computing technique which is used...

Read full article >

Designed in a flexible and user-friendly demeanor, Java is the most commonly used programming language for the creation of web applications and platform. It allows developers to “write once, run anywhere” (WORA). It is general-purpose, a high-level programming language developed by Sun Microsystem. Initially known as an...

Read full article >

Java is the most commonly used popular programming language for the creation of web applications and platform today. Integrated Cloud Applications and Platform Services Oracle says, “Java developers worldwide has over 9 million and runs approximately 3 billion mobile phones”.  Right from its first implication as java 1.0...

Read full article >

Java is the most famous programming language till date. 20 years is a big time for any programming language to survive and gain strength. Java has been proved to be one of the most reliable programming languages for networked computers. source:techcentral.com Java was developed to pertain over the Internet. Over...

Read full article >

Looking for Java Training Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

Looking for Java Training Classes?

The best tutors for Java Training Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Learn Java Training with the Best Tutors

The best Tutors for Java Training Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more