📖 What is this tool?
JSON to Java Generator converts JSON objects into Java POJO (Plain Old Java Object) classes with private fields, getters and setters. Instantly scaffold Java data models from any JSON structure without writing boilerplate manually.
💡 Example
Input
{"id":1,"name":"Alice","active":true}
Output
public class Root {
private int id;
private String name;
private boolean active;
// getters and setters...
}
🛠️ Common Use Cases
- Generate Java model classes from API responses
- Scaffold data objects from JSON samples
- Create POJOs for JSON deserialization
- Bootstrap Java projects with data classes
- Convert API documentation JSON to Java
❓ Frequently Asked Questions
What is a POJO in Java? ▾
A POJO (Plain Old Java Object) is a simple Java class with private fields and public getters/setters. It's the standard way to represent data in Java, especially for JSON serialization with libraries like Jackson or Gson.
How do I deserialize JSON into a Java POJO? ▾
Use Jackson: ObjectMapper mapper = new ObjectMapper(); MyClass obj = mapper.readValue(jsonString, MyClass.class); Or Gson: Gson gson = new Gson(); MyClass obj = gson.fromJson(jsonString, MyClass.class);
Does it handle nested objects? ▾
The generator handles flat objects. For nested objects, it identifies nested object types by key name and generates a type reference. Create separate classes for nested types manually.
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