How to use this developer tool
- Enter fields as one type-and-name pair per line.
- Choose the Java template type.
- Enter a valid package name.
- Run Generate Java.
- Copy or download the generated ClassName.java file.
#138 · Programming Languages Developer Tool
Java Generator
Generate copy-ready Java classes, records, interfaces, enums, utility classes, exceptions, and POJOs from validated package, class, and field definitions. Code generation runs locally and downloads as a correctly named .java file.
Developer Input
Source codeAd space
What this developer tool does
It validates identifiers, parses field lines, and generates deterministic Java source for common class patterns. The class name is read from the first field comment directive or defaults to GeneratedModel.
Validate package and fields → select template → generate declaration → add fields and methods → format output → set .java filename.
Use a first line such as // Class: User to define the class name. Records require Java 16 or later.
Example
Input
// Class: User String name int age
Output
public class User {
private String name;
private int age;
}Tips for better output
- Use // Class: Name as the first line.
- Use valid Java identifiers for field names.
- Review equals/hashCode needs separately for domain models.
FAQ
How do I generate a Java class with getters and setters?
Choose POJO, enable getters and setters, and enter one field per line.
How can I create a Java POJO online?
Choose POJO and provide the package, class directive, and fields.
How do I generate a Java record from field names?
Choose Record. The generator creates record components from valid field lines.
Can I generate a Java builder pattern automatically?
This version focuses on common core templates; use the POJO output as a base for a project-specific builder.
How do I create a Java class from package and field inputs?
Enter the package and fields, optionally set // Class: Name, then generate the source.
Related developer tools
Supported templates
| Class | Fields and optional methods |
|---|---|
| POJO | Constructor and accessors |
| Record | Compact immutable data carrier |
| Utility | Final class with private constructor |