Java Serialization import java.io.*; public class SerializeDemo { public static void main(String [] args) { //Serialization = The process of converting an object into a byte stream. // Persists (saves the state) the object after program exits // This byte stream can be saved as a file or sent over a network // Byte stream can be saved as a file (.ser) which is platform independent // (Think of this as if you're saving a file with the object's information) // Steps to Serialize // --------------------------------------------------------------- // 1. Your class should implement Serializable interface // 2. add import java.io.Serializable; // 3. FileOutputStream fileOut = new FileOutputStream(file path) // 4. ObjectOutputStream out = new ObjectOutputStream(fileOut); // 5. out.writeObject(objectName) // 6. out.close(); fileOut.close(); // --------------------------------------------------------------- //Deserialization = The reverse process of converting a byte stream into an object. // (Think of this as if you're loading a saved file) // Steps to Deserialize // --------------------------------------------------------------- // 1. Your class should implement Serializable interface // 2. add import java.io.Serializable; // 3. FileInputStream fileIn = new FileInputStream(file path); // 4. ObjectInputStream in = new ObjectInputStream(fileIn); // 5. objectNam = (Class) in.readObject(); // 6. in.close(); fileIn.close(); // --------------------------------------------------------------- // important notes 1. children classes of a parent class that implements Serializable will do so as well // 2. static fields are not serialized (they belong to the class, not an individual object) // 3. Fields declared as "transient" aren't serialized, they're ignored // 4. the class's definition ("class file") itself is not recorded, cast it as the object type // 5. serialVersionUID is a unique version ID //SerialVersionUID = serialVersionUID is a unique ID that functions like a version # // verifies that the sender and receiver of a serialized object, // have loaded classes for that object that are compatible // Ensures object will be compatible between machines // Number must match. otherwise this will cause a InvalidClassException // A SerialVersionUID will be calculated based on class properties, members, etc. // A serializable class can declare its own serialVersionUID explicitly (recommended) User user = new User(); user.name = "Bro"; user.password = "I

By far, Bro Code has the most succinct, and clearest explanations of Java on KZfaq! No more than needed, no less than required. Good job!

such an amazing tutorial! I was having some trouble working with SQL databases and had to resort to serialization for my cs project, saved my life!

Clear how-to and break down, still technical but not boring! Thanks Bro Code!

This is the guy who needs support! Thanks this tutorial was the best Bro!

This is the only channel on KZfaq I literally feel I must comment on every time I watch , else I'm a bad guy XD Your videos are great ... Seriously !!

You explain it better than my teacher bro. Thank you.

Absolute the best serialization tutorial video I have ever watched! Thank you

Best explanation I ever had for this topic! Thank you! Can't believe this is on youtube!

Came back to rewatch the video and brush up on that topic. Thanks, Bro!

Top video. Very informative, and easy to follow as usual. Thanks Bro.

wanted to learn this for a save function, tysm bro

I have a Software Engineer interview in 2 days, and I never knew what Serializing and Deserializing actually meant in Java, until now. THANKS A TON Bro!

You're a champ bro! Tried to create a savefile through parsing the objects variables and then reread them and create through it the new objects. This is way easier. Thanks!

Hey bro, thanks a lot for your amazing videos! I just want to add another detail: if a class has fields that are other custom-made classes, then these classes ALSO have to implement Serializable

Thank you so much for these videos!

Bro, this is getting serioulized 💕

Thanks Bro!.. for the new video!

Legend. Solo carrying My Butt through advanced programming

Your videos are very very helpful but its been a while that you did not post anything about Java, your community is waiting and thank you for that

Dope tutorial! Helped me for an exam!

thankz bro amazing way to teaching keep it up !!!

TYVM Bro code! You are superb!

very detail and easy to understand

Great

thanks for this amazing video !

Helpful video, thank you.

Very complicated, good job

The perfect video for the topic!

Great video. All doubts clear.

Nice! Thanks Bro!

Awesomely great

Nice

Bro, I need a teacher like him in my classes

Good work bro

great stuff, way more complete than what the teacher explained in class lmao

Guys, make sure your package file need to be the same in both the serialization folder and deserialization, then you won't get ClassNotFoundExpection for this. And bro you your video is fantastic. Love from China

great video thank you 👍

Another great video as always

Great job bro:)

Nice tutorial

Thanks Bro.

Great video as the rest you've made.

great

good job

NOTE Converting an object into a byte stream = serialization Converting a byte stream into an object = deserialization

U re legend thanks so much 🙏

Love you, bro

good tutorial

Thanks mate

Tremendo!

Hey you. If you find this video helpful, pls make sure to like, comment,and subscribe if you want to become a fellow bro. Is that spells right? Because I can speak this sentence in my dream. It’s so familiar.

Thanks

Is there anyone here have this problem? "Exception in thread "main" java.lang.NullPointerException: Cannot invoke "Object.getClass()" because "user" is null" When I try to separate serialize and deserialize into 2 projects like in the video, serialize project works fine but deserialize project gives this error. And when I put serialize and deserialize in the same file, it works perfectly. If you know how to fix this problem, please help me!

nc one

13:42 (Part 2)

you are the besst!

thank you bro

thanks bro

I really want to get started into coding, but don’t know where to start! Could I get any pointers?

what is the difference if i store data into json file farmat? i found another youtuber said that serialization is a process to convert data from RAM into string format like json, so that it can be stored and send to your friends, etc. Is he correct?

thankyouuuu

Need series on Android app development bro !

when i try to make deserialization i got this message( class libraryBook cannot be cast to class java.util.ArrayList)

Please, please, please make a video on ML or Neural net, please teach how to make a very simple neural net in *JAVA* Even if you suck at those ML things, please figure it out, and make a tutorial on it, pleaseeeeeee

when u get no thumbs down, u can be sure u did good

Very helpful video, thanks. If I knew about this, i wouldn't have to create .txt files using damn FileWriter and split them using _ and . When I wanted to read them, I split the entire long character string using split() method, which resulted in countless problems and headaches, as you can imagine lol.

84th. Thank you, ma Bro Sensei

hey, thanks for the tutorial , however I have a little problem , whenever I use ObjectOutPutStream or InputStream I get an exception wether it was out.writeObject or in.readObject I imported everything and I made sure the error was from those statments when I surrounded them with a try statment please help

hello Bro code Iam your Subscriber can you please upload a video on Annotations because of iam confusing about it

I love you bro

keep on getting ClassNotFoundException error.

ywaah!

liked commented subscribed

Getting the Classcastexception in my Deserialization package... IDE says everything is correct tho it is not printing the values.. any solutions? Please🥺

I am getting java.lang.ClassCastException. It says that both the user classes are in an unnamed module of loader 'app'. What does it mean? A solution to my problem would be great. Thanks.

saved my life

I had a problem when I was doing this in VS Code. The software makes packages for both serialization and deserialization folder in the code, which if removed I couldn't run in the VS Code. But even after following Bro's code step by step, I faced the error :- Exception in thread "main" java.lang.ClassCastException: class broCode.Serialization.User cannot be cast to class broCode.Deserialization.User (broCode.Serialization.User and broCode.Deserialization.User are in unnamed module of loader 'app'). This was very annoying cause I followed step by step. So Stack said that I can change the medium of file I'm saving on to something like a JSON file. But if it can work for bro, it can for us. Thus did it without VS Code the manual way by notepad and cmd prompt (also removed the part of packages, even tho both the code lay in different folder) it worked. Typing all of this for anyone who faces Class Cast Exception.

bro doesnt link git but pastes Code into comments. 👌💪

Where do you work Bro ?

حرفيا ابونا

Is it possible to save the file as ".txt" instead of ".ser"?

Oh no how do you know my password?:D Thanks for the video, helps so much with Java test prep:)

why I am getting error = >Exception in thread "main" java.lang.ClassCastException

beast 🫶

13:12 "To something secure such as *password123* "

*insert The prophecy is true meme clip*

source code please !!! BRO

bro code

"something secure like... password123" 😆😆

: )

statistics

doesn't work :(

Thanks so much!

Comment

13:10 update the password to something secure 😂😂

Nice