ZenCompiler provides an enterprise-ready online Java compiler powered by OpenJDK. Write, compile, and run Java applications featuring Object-Oriented Design, polymorphism, Java Collections Framework (ArrayList, HashMap, TreeMap, PriorityQueue), String operations (substring, indexOf, split, Integer.parseInt), for loops, do-while loops, switch statements, Streams API, lambdas, and multi-threaded concurrency patterns.
Built for high execution velocity, seamless STDIN interactivity, and zero configuration.
Modern OpenJDK compiler with full backward compatibility for Java 8, 11, and 17 syntax
Full Java standard library support including PriorityQueue, Math.random(), and String utilities
Interactive java.util.Scanner and BufferedReader terminal input support
Call stack and object heap execution visualizer for tracing OOP hierarchies and polymorphism
Automatic package and public class Main entry-point resolution
Compiled with javac and executed on 64-bit OpenJDK Linux container sandboxes with tuned JVM memory flags.
AP Computer Science curriculum, Java enterprise interview prep, LeetCode Java solutions, data structures implementation (priority queues, trees, graphs), and beginner Java syntax mastery.
Everything you need to know about compiling and executing Java on ZenCompiler.
Switch to another language sandbox with instantaneous execution.