JAVA PROGRAM • LEVEL 14 — FILE HANDLING & SERIALIZATION

Serialize and Deserialize an Object in Java

Learn serialize and deserialize an object in java with a complete, compiler-ready Java 17 example.

AdvancedSerializableObject streams

PROBLEM UNDERSTANDING

Input and expected output

Sample input
No input required
Sample output
Ravi 91

COMPLETE JAVA 17 PROGRAM

Complete Java 17 implementation

java-object-serialization.java
Open in compiler
import java.io.*;
record Student(String name,int mark) implements Serializable{}
class Main{public static void main(String[] args)throws Exception{try(ObjectOutputStream out=new ObjectOutputStream(new FileOutputStream("student.dat"))){out.writeObject(new Student("Ravi",91));}try(ObjectInputStream in=new ObjectInputStream(new FileInputStream("student.dat"))){Student student=(Student)in.readObject();System.out.println(student.name()+" "+student.mark());}}}

GUIDED CODE TOUR • NOT LIVE EXECUTION

Study the program line by line

Use the real compiler button above to run and debug with different inputs.

CURRENT STEP

Select Start to walk through the important lines.

SELECTED LINE

No line selected

EXPECTED OUTPUT FOR THE SAMPLE

Ravi 91
0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

  1. Initialize the deterministic sample values used for serialize and deserialize an object in java.
  2. Create the required object and apply Serializable and Object streams to its state or behavior.
  3. Print the final result and compare it with the documented sample output.

This Java 17 example demonstrates Serializable and Object streams through a complete, executable program. The values are intentionally small so students can trace each statement, verify the output, and then modify the example safely in the online compiler.

EFFICIENCY

Time and space complexity

Time complexity

O(n)

Auxiliary space

O(1)

DEBUGGING CHECKLIST

Common mistakes

Check this

Keep the class name Main and the entry method signature public static void main(String[] args) when using the online compiler.

Check this

Use Serializable with compatible Java types; Java checks types and method signatures at compile time.

Check this

Java is case-sensitive, and every statement that requires a semicolon must end with one.

Try it yourself

Practice: Run the program with the sample input, predict its output, and then test one boundary case of your own.