How does switch expressions behave in multithreaded code?

Switch expressions in Java are designed to provide a more concise and readable way of handling multiple conditions. In multithreaded code, the behavior of switch expressions is similar to traditional switch statements. However, special attention must be given to the synchronization of shared resources to avoid race conditions and ensure thread safety.

When using switch expressions inside multithreaded contexts, it’s crucial to understand that all threads can simultaneously evaluate the switch expression based on their own context. If they manipulate shared variables, it may require synchronization to maintain data integrity.

Here is an example illustrating a switch expression in a multithreaded environment:

public class SwitchExample { public static void main(String[] args) { Runnable task = () -> { int condition = (int) (Math.random() * 3); String result = switch (condition) { case 0 -> "Zero"; case 1 -> "One"; case 2 -> "Two"; default -> "Unknown"; }; System.out.println(Thread.currentThread().getName() + " - Condition: " + condition + ", Result: " + result); }; Thread thread1 = new Thread(task); Thread thread2 = new Thread(task); thread1.start(); thread2.start(); } }

Java switch expressions multithreading thread safety synchronization race conditions

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