Convert Java to JavaScript instantly. Perfect for porting Java algorithms to web frontends, creating Node.js versions of Java services, or migrating desktop Java apps to web platforms.
Paste code in both editors to see differences
Hint: Paste original code on left, modified code on right, then click Compare to see differences highlighted.
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Converting Java to JavaScript brings enterprise Java logic to web platforms and Node.js. Our AI converter translates Java classes to ES6 classes, interfaces to duck typing patterns, and collections to JavaScript arrays/Maps/Sets. Perfect for creating web versions of Java desktop applications, porting business logic to Node.js microservices, implementing Java algorithms in browser JavaScript, or migrating from Java backends to serverless JavaScript functions. Handles Java-specific features like strong typing (removed or converted to JSDoc), checked exceptions (converted to try/catch), and access modifiers (converted to naming conventions or private fields).
Converts Java classes to JavaScript ES6 classes. Constructors map directly, public/private/protected become # private fields or naming conventions, extends/implements keywords work similarly, and static members use static keyword.
Transforms Java collections to JavaScript equivalents. ArrayList/LinkedList become Arrays, HashMap becomes Map or Object, HashSet becomes Set, and stream operations convert to array methods like map/filter/reduce.
Removes Java's static type system. Generic types are erased, interfaces become duck typing, type casts are removed, and compile-time type checking converts to runtime validation if needed.
Converts Java exceptions to JavaScript errors. Checked exceptions become regular Error throws, try/catch/finally works identically, custom exceptions convert to Error subclasses, and throws declarations are removed.
Java classes convert to JavaScript ES6 classes. Public/private modifiers become # private fields or conventions, constructors map directly, methods convert to class methods, and static members use the static keyword.
Java interfaces convert to TypeScript-style JSDoc annotations or are omitted in plain JavaScript. Interface contracts become duck typing, and implementations are verified at runtime if needed rather than compile-time.
Java generics are erased during conversion as JavaScript has no compile-time type system. Generic types become regular JavaScript code, type parameters are removed, and type bounds convert to runtime checks if necessary.
