⚔️ Runnable vs Callable

Understanding Java Concurrent Interfaces

When to use Runnable vs Callable for multithreading

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🎯 About

Explore the differences between Runnable and Callable interfaces in Java concurrent programming.

📊 Comparison

Feature	Runnable	Callable
Return Value	void	V (Generic)
Exception	No checked exceptions	Can throw exceptions
Method	run()	call()
Package	java.lang	java.util.concurrent
Use with	Thread, ExecutorService	ExecutorService only

💻 Examples

// Runnable - No return value
Runnable task = () -> System.out.println("Running");
new Thread(task).start();

// Callable - Returns value
Callable<Integer> task = () -> 42;
Future<Integer> future = executor.submit(task);
int result = future.get();

🛠️ Technologies

Java | Concurrency | ExecutorService | Future

📬 Contact

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Keywords: Java Runnable Callable Multithreading Concurrency Future ExecutorService