Are you tied to this library? Google Gson is very popular. I have myself not used it with Generics but their front page says Gson considers support for Generics very important.
Answer from Miserable Variable on Stack Overflow Top answer 1 of 3
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Are you tied to this library? Google Gson is very popular. I have myself not used it with Generics but their front page says Gson considers support for Generics very important.
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As others have hinted, you should consider dumping org.json's library. It's pretty much obsolete these days, and trying to work around its problems is waste of time.
But to specific question; type variable T just does not have any information to help you, as it is little more than compile-time information. Instead you need to pass actual class (as 'Class cls' argument), and you can then create an instance with 'cls.newInstance()'.
Baeldung
baeldung.com › home › java › different serialization approaches for java
Different Serialization Approaches for Java | Baeldung
July 18, 2025 - Java supports built-in serialization that is easy to use. JSON is preferable due to readability and being schema-less. Hence, both Gson and Jackson are good options for serializing JSON data. They are simple to use and well documented.
How to serialize to json?
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September 29, 2024Explain like i'm five - what is Serializable?
Please ensure that: Your code is properly formatted as code block - see the sidebar (About on mobile) for instructions You include any and all error messages in full You ask clear questions You demonstrate effort in solving your question/problem - plain posting your assignments is forbidden (and such posts will be removed) as is asking for or giving solutions. Trying to solve problems on your own is a very important skill. Also, see Learn to help yourself in the sidebar If any of the above points is not met, your post can and will be removed without further warning. Code is to be formatted as code block (old reddit: empty line before the code, each code line indented by 4 spaces, new reddit: https://i.imgur.com/EJ7tqek.png ) or linked via an external code hoster, like pastebin.com, github gist, github, bitbucket, gitlab, etc. Please, do not use triple backticks (```) as they will only render properly on new reddit, not on old reddit. Code blocks look like this: public class HelloWorld { public static void main(String[] args) { System.out.println("Hello World!"); } } You do not need to repost unless your post has been removed by a moderator. Just use the edit function of reddit to make sure your post complies with the above. If your post has remained in violation of these rules for a prolonged period of time (at least an hour), a moderator may remove it at their discretion. In this case, they will comment with an explanation on why it has been removed, and you will be required to resubmit the entire post following the proper procedures. To potential helpers Please, do not help if any of the above points are not met, rather report the post. We are trying to improve the quality of posts here. In helping people who can't be bothered to comply with the above points, you are doing the community a disservice. I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns. More on reddit.com
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April 26, 2024Videos
35:51
Serialize and Deserialize JSON using Jackson - YouTube
17:41
Mastering Java Reflection: Configuring Your JSON Serializer - Part ...
16:12
Mastering Java Reflection: Configuring JSON Serialization with ...
20:02
Java Reflection Serializer to JSON Series - Part 1 - YouTube
07:16
Java Tips and Tricks: Custom Serialization with @JsonSerialize ...
How to Properly Serialize JSON in Java Using ObjectMapper
Oracle
blogs.oracle.com › javamagazine › java-json-serialization-jackson
Efficient JSON serialization with Jackson and Java | javamagazine
Jackson can be used to automatically serialize this class to JSON so that it can, for example, be sent over the network to another service that may or may not be implemented in Java and that can receive JSON-formatted data.
Reddit
reddit.com › r/javahelp › how to serialize to json?
r/javahelp on Reddit: How to serialize to json?
September 29, 2024 -
Hi,
I use a library that uses a property name for getter methods (without get prefix - looks like a record but defined as a class)
and by default, Jackson does not serialize such classes. Is it possible to configure Jackson and make it work?
Here is my test:
static class User {
private int age;
User(int age) {
this.age = age;
}
public int age() {
return this.age;
}
}
@Test
public void DD1() throws JsonProcessingException {
ObjectMapper OBJECT_MAPPER = new ObjectMapper();
System.out.println(OBJECT_MAPPER.writeValueAsString(new User(2)));
} Top answer 1 of 3
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Jackson doesn't automatically recognise methods that don't follow get/is prefix convention. You can use annotations though. static class User { private int age; User(int age) { this.age = age; } @JsonProperty("age") public int age() { return this.age; } } That should do the trick...
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If you can't use annotations then your next step to investigate might be custom deserialisers https://www.baeldung.com/jackson-deserialization
Medium
medium.com › @bubu.tripathy › json-serialization-and-deserialization-in-java-2a3f08266b70
JSON Serialization and Deserialization in Java | by Bubu Tripathy | Medium
April 9, 2023 - We then call the `readValue()` method of the `ObjectMapper` class, passing in the JSON string and the class of the Java object we want to deserialize to. This method returns an instance of the Java class containing the deserialized data, which we then print to the console. Now let’s take a look at an example of using annotations to customize the serialization and deserialization of JSON data.
Spring
docs.spring.io › spring-boot › reference › features › json.html
JSON :: Spring Boot
Spring Boot also provides ObjectValueSerializer and ObjectValueDeserializer base classes that provide useful alternatives to the standard Jackson versions when serializing objects. See ObjectValueSerializer and ObjectValueDeserializer in the API documentation for details. The example above can be rewritten to use ObjectValueSerializer and ObjectValueDeserializer as follows: Java · Kotlin · import tools.jackson.core.JsonGenerator; import tools.jackson.core.JsonParser; import tools.jackson.databind.DeserializationContext; import tools.jackson.databind.JsonNode; import tools.jackson.databind.Se
Skillsoft
skillsoft.com › home › serialization in java: using json in java for serialization & parsing
Serialization in Java: Using JSON in Java for Serialization & Parsing - Java - BEGINNER - Skillsoft
The JavaScript Object Notation (JSON) format is a widely used data format for serializing the internal state of objects to a structured and human-readable format. Take this course to explore the org.json library, which offers powerful features and constructs for the serialization of Java objects ...
MojoAuth
mojoauth.com › serialize-and-deserialize › serialize-and-deserialize-json-with-java
Serialize and Deserialize JSON with Java | Serialize & Deserialize Data Across Languages
December 14, 2025 - Jackson stands out as a premier, high-performance Java library for handling JSON. Its core strength lies in its ability to seamlessly serialize Java objects into JSON strings and deserialize JSON back into Java objects.
CodeMiner42
blog.codeminer42.com › home › posts › serialization and deserialization in java using jackson a practical guide on how to serialize and deserialize objects to json in java using jackson.
Serialization and Deserialization in Java using Jackson A practical guide on how to serialize and deserialize objects to JSON in Java using Jackson. - The Miners
May 29, 2023 - Serialization is the process of converting the state of an object to a byte stream in a way that the byte stream can be reverted into a copy of the original object. Deserialization, as you may already have inferred, is the process of converting ...
CodeGym
codegym.cc › courses › java collections › serialization into json
Course Java Collections - Lecture: Serialization into JSON
We take ObjectMapper and pass it a string or a StringReader with JSON, as well as the class of the object to be deserialized. Then we call the readValue method, and as output we get a ready-made Java object with all of the data." "Well, that's exactly like deserialization in Java." "Almost. There are several requirements placed on objects serialized into, or deserialized from, JSON:"
Newtonsoft
newtonsoft.com › json › help › html › serializingjson.htm
Serializing and Deserializing JSON
For simple scenarios where you want to convert to and from a JSON string, the SerializeObject and DeserializeObject methods on JsonConvert provide an easy-to-use wrapper over JsonSerializer.
SSOJet
ssojet.com › serialize-and-deserialize › serialize-and-deserialize-json-in-java
Serialize and Deserialize JSON in Java | Serialize and Deserialize Data in Programming Languages
Easily serialize and deserialize JSON in Java with Jackson. Map Java objects to JSON and vice-versa for efficient data handling.
GeeksforGeeks
geeksforgeeks.org › java › serialization-and-deserialization-in-java
Serialization and Deserialization in Java - GeeksforGeeks
June 2, 2025 - Serializable Interface: If we want to make a class serializable, then it must implement the Serializable interface. This interface does not contain any methods or variables ( marker interface), but it gives a signal that the class is ready for serialization. Deserialization is the reverse process where the byte stream is used to recreate the actual Java object in memory.
DEV Community
dev.to › brunooliveira › practical-java-16-using-jackson-to-serialize-records-4og4
Practical Java 16 - Using Jackson to serialize Records - DEV Community
April 24, 2021 - Currently, using Java < 16 and Jackson, since records are not supported, the only way we have to serialize a Java object into JSON, is to use the Jackson object mapper, as follows:
GitHub
github.com › stleary › JSON-java › issues › 454
JSONObject and JSONArray should impliment Serializable · Issue #454 · stleary/JSON-java
December 14, 2018 - You can serialize objects that have JSON members. Consistency. Every data structure class (Map, List etc) in the java.* packets implements Serializable as to be flexible (most other classes in java.* also implement Serializable).
Author Tacodiva
Baeldung
baeldung.com › home › json › jackson › intro to the jackson objectmapper
Intro to the Jackson ObjectMapper | Baeldung
December 9, 2025 - The simple readValue API of the ObjectMapper is a good entry point. We can use it to parse or deserialize JSON content into a Java object. Also, on the writing side, we can use the writeValue API to serialize any Java object as JSON output.
TutorialsPoint
tutorialspoint.com › how-to-serialize-a-json-string-to-an-output-handler-in-java
How to serialize a JSON string to an Output Handler in Java?
We can serialize a JSON string to an Output Handler using the WriterOutputHandler class and it implements the OutputHandler interface. public class WriterOutputHandler extends Object implements OutputHandler · import java.io.*; import flexjson.JSONSerializer; import flexjson.OutputHandler; ...
Medium
medium.com › @AlexanderObregon › managing-json-serialization-with-spring-boot-and-jackson-f1fedb712bf3
Managing JSON Serialization with Spring Boot and Jackson
April 29, 2024 - Spring Boot, one of the most popular frameworks for building enterprise-grade applications in Java, comes bundled with a high-performance JSON processor, Jackson, which handles all the JSON serialization and deserialization operations behind the scenes.
Baeldung
baeldung.com › home › java › core java › introduction to java serialization
Introduction to Java Serialization | Baeldung
May 11, 2024 - Serialization is the conversion of the state of an object into a byte stream; deserialization does the opposite. Stated differently, serialization is the conversion of a Java object into a static stream (sequence) of bytes, which we can then ...
Reddit
reddit.com › r/javahelp › explain like i'm five - what is serializable?
r/javahelp on Reddit: Explain like i'm five - what is Serializable?
April 26, 2024 -
I just don't get it. I'm a junior and see it often in the codebase of the company i work at. Documentation says that it helps serialize and deserialize objects, but why does that need to happen using this interface? There are so many classes that do not implement Serializable, so what happens to them?
Head First Java book says that objects need to be serialized when data is sent over the network or saved to a disk. But there is serialization/deserialization happening to JSON objects for example when they're being sent from server to client and vice versa, and those classes do not implement Serializable.
So in which "special" scenario does one need/want to implement Serializable?
Top answer 1 of 7
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Serializable marks a java object as being able to be converted into another form in a way that is 'meaningful'. That form could be a JSON representation, or XML representation of the object, or Java binary representation. Once your Java object is in that form, you can then save that representation to disk, or send it over a network. So what makes Serializable special? Because not every object is able to be serializable (i.e. converted from a Java object, into, say JSON) or more precisely the transformed version of that object may not be in any way meaningful. For example, the Java Thread class is not Serializable because it makes no sense, for example, to convert it into JSON representation because it encapsulates an actual running java thread that is connected to an OS thread and a specific OS process. Converting the Thread object to a JSON representation loses that direct connection to something tangingle happening in the system. Another example would be an InputStream object, which typically encapsulates a 'stream' of bytes - and again serializing that class into an XML representation makes no sense conceptually and provides no value.
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Back in the "old days" of application servers Sun touted how you could have multiple machines connected together for the whole application. For example, three machines, web front end, database, and business logic. Java objects that were transferred between the machines needed to be serialized.