Java Multithreading — Free Java Tutorial
Learn Java Multithreading in Java with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn Java Multithreading in Java with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
Java Multithreading in Java
Java supports multithreading natively — multiple threads run concurrently within the same process, sharing memory. This improves performance for I/O-bound tasks.
Create threads by extending Thread class or implementing Runnable interface (preferred — allows extending other classes). Java 8+ also uses lambda: new Thread(() -> {...}).
Synchronisation prevents race conditions — when multiple threads modify shared data simultaneously. Use synchronized keyword on methods or blocks to lock access.
The Executor framework (ExecutorService) manages thread pools efficiently. Better than creating threads manually. Use Callable and Future for threads that return values.
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