Java to Dart

Free Java to Dart Code Converter

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Transform your code from Java to Dart with our free AI-based code convertion tool. If you like what you see, we also create documentation for your code! We don't ever store your code or any representation of it in our databases, but it will be shared with the LLM of our choice for processing.

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How to convert from Java to Dart


As a proficient Java developer, transitioning to Dart can seem both intriguing and daunting. Dart, developed by Google, is gaining popularity, especially for Flutter app development. This guide aims to streamline your learning curve by focusing on a Free Java to Dart Code Converter methodology.

Understanding the Basics

Dart vs. Java: Key Differences

Before diving into code conversion, it's crucial to understand the core differences between Java and Dart.

  1. Syntax and Semantics: While both languages are object-oriented, Dart has a cleaner, more concise syntax.
  2. Type System: Dart offers both strong and weak typing through var and dynamic, whereas Java primarily uses strong typing.
  3. Null Safety: Dart has built-in null safety, reducing runtime errors.
  4. Concurrency Model: Dart uses asynchronous programming with async and await, unlike Java's more conventional thread-based model.

Setting Up Your Environment

To start converting Java code to Dart, ensure you have a compatible development environment:

  1. Install Dart SDK: Download and install Dart SDK from the official Dart website.
  2. IDE Support: Use an IDE like IntelliJ IDEA or Visual Studio Code, which offers excellent support for both Java and Dart.

Java to Dart: Data Types Conversion

Primitive Data Types

In Java:

int number = 10;
double value = 5.5;
String name = "Java";

In Dart:

int number = 10;
double value = 5.5;
String name = "Dart";

Notice how the basic data types remain largely the same but with simpler initializations.

Structural Components Conversion

Classes and Objects


public class Animal {
    String name;
    public Animal(String name) { = name;

    public void makeSound() {
        System.out.println("Animal sound");


class Animal {
  String name;

  void makeSound() {
    print("Animal sound");

Key Takeaways:

  • The public access specifier is not needed in Dart.
  • Dart uses the constructor shorthand for member initialization (Animal(

Functions and Methods

Defining Functions


public void greet(String name) {
    System.out.println("Hello, " + name);


void greet(String name) {
  print("Hello, $name");

Key Takeaways:

  • Dart uses string interpolation instead of concatenation.
  • Return type and method signature syntax are simpler in Dart.

Control Flow

Conditional Statements


if (age > 18) {
} else {
    System.out.println("Not an Adult");


if (age > 18) {
} else {
  print("Not an Adult");

Handling Collections

Lists and Maps


List<String> fruits = new ArrayList<>();


List<String> fruits = ["Apple", "Banana"];

Maps in Java:

Map<String, Integer> scores = new HashMap<>();
scores.put("Alice", 90);
scores.put("Bob", 85);

Maps in Dart:

Map<String, int> scores = {
  'Alice': 90,
  'Bob': 85,

Asynchronous Programming

Future and Async/Await

Java (Using CompletableFutures):

CompletableFuture.supplyAsync(() -> {
    try {
    } catch (InterruptedException e) {
    return "Done";


Future<String> fetchData() async {
  await Future.delayed(Duration(seconds: 1));
  return "Done";

Key Takeaway: Dart's async and await keywords provide a more readable and straightforward approach to handle future-based asynchronous operations.


Transitioning from Java to Dart requires a good understanding of syntactical and conceptual differences. With this guide, you have a structured approach to follow, enabling you to leverage a Free Java to Dart Code Converter methodology yourself. Practice by rewriting Java code snippets in Dart and consult the official Dart documentation for deeper insights.

So, get started, refine your skills in Dart, and embrace the smooth development experience it offers. Happy coding!

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