Online Java Editor
Write and share Java in the browser, and collaborate on it live — nothing to install.
ShareCode gives you a browser-based Java editor with syntax highlighting and an instant shareable link. It's ideal when you need to look at Java together — an interview question, a class example, or a method you want reviewed — without anyone installing a JDK or opening a full IDE.
Open a code space, write or paste your Java, and share the URL. Collaborators edit alongside you in real time, with synchronized cursors, so a discussion about code happens on the code itself rather than over a laggy screen-share.
ShareCode is a collaborative editor rather than a Java compiler — it highlights and syncs your code but does not build or run it. That makes it the right tool when the goal is reading, writing, and discussing Java together, which is exactly what interviews, lessons, and reviews are about.
Why use an online Java editor?
Java's local setup is famously heavy: a JDK, a build tool, an IDE that indexes for a minute before it's useful. None of that is worth it to show someone a single class or talk through a method during an interview. A browser editor sidesteps the whole toolchain — the other person clicks a link and is reading your Java immediately, on whatever machine they have.
And because the space is live rather than a static paste, the reviewer or interviewer isn't a passive spectator. They can rename a variable, sketch an alternative, or drop in a follow-up method directly in the shared file, and you both see it happen. That interactivity is what makes it better than emailing a .java file back and forth.
Real-time collaboration
Edit the same Java file with a teammate or candidate, with live cursors and instant sync.
No JDK, no IDE
Everything runs in the browser. There's nothing to install before you can read or write Java together.
Instant shareable link
Each code space has a URL you can drop into chat or an interview invite — collaborators join with one click.
How to use the Java editor
Open a code space
Create a fresh space at its own URL with one click — no JDK, no IDE, no account.
Write or paste Java
Add your class or method and select Java from the language menu so the highlighting matches.
Share the link
Send the URL in an interview invite or a chat message; the recipient opens the same code instantly.
Review together
Both of you edit live — rename, refactor, or add a test case while you talk it through.
A Java starting point
public class Main {
public static void main(String[] args) {
System.out.println("Hello, world!");
}
}What it's great for
Coding interviews and screens
Share a link and have a candidate write a class or solve a problem live. Zero setup means the time goes to the problem, not to environment trouble, and you watch the approach unfold as they type.
Teaching object-oriented basics
Walk a class through inheritance, interfaces, or generics by editing real Java in front of them. It opens on any browser, so there's no lab setup to coordinate first.
Reviewing a class or method
Paste the code under discussion and annotate it together — the reviewer can suggest a change in place rather than describing it in a comment thread.
Sharing a reproducible example
Need to show the exact code behind a question? A link beats a screenshot because the other person can edit and extend it.
Frequently asked questions
Can I compile and run Java here?
ShareCode is a collaborative editor for writing and sharing Java, not a compiler — it highlights and syncs your code but does not run it. Browser execution is available for JavaScript only.
Is it good for interviews?
Yes — a shared link, live cursors, and zero setup make it a common choice for remote Java interviews and pair programming, where the focus is the candidate's approach rather than running the code.
Do collaborators need to install anything?
No JDK, no IDE, no account. Everything happens in the browser, so anyone with the link can read and edit your Java immediately.
Is it free?
Yes. Creating spaces, sharing links, and collaborating are free, with no charge for the people you invite.
Java snippets to try
Start writing Java now
A fresh code space, a shareable link, and real-time collaboration — in seconds.