Java Online IDE
Java, no JDK install needed.
Write Java programs and run them instantly in sandboxed containers. Full JDK with the standard library. No JAVA_HOME, no PATH, no IDE heavyweight.
Main.java
Features
Why YaliCode for Java
Full JDK
OpenJDK 21 with the complete standard library. Compile and run with one click.
Instant feedback
Pre-warmed containers compile and run your Java code in seconds. No IDE boot time.
Modern Java
Records, sealed classes, pattern matching, var — all the latest Java features work.
Share & fork
Share your Java programs with a URL. Anyone can view, fork, and run your code.
Use cases
What you can build
CS courseworkAlgorithm practiceOOP design patternsInterview prepLearning Java
Main.java
import java.util.*;
import java.util.stream.*;
public class Main {
public static void main(String[] args) {
var words = List.of("hello", "world", "java");
String result = words.stream()
.map(String::toUpperCase)
.collect(Collectors.joining(", "));
System.out.println(result);
}
}
Output:
HELLO, WORLD, JAVA
More languages
Not just Java.
YaliCode supports 24 languages and 14 frontend framework templates. Pick your stack.
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