Will using the volatile keyword ensure correct incrementing of a counter in a multithreaded environment?

The volatile keyword in Java guarantees visibility of variable changes between threads but does not ensure atomicity of operations.

Incrementing a counter (counter++) is a compound operation (read, increment, write) that is not atomic.

Therefore, using volatile for a counter in a multithreaded environment does not guarantee correct incrementing and can lead to lost updates.

For correct incrementing in a multithreaded environment, you should use:

• AtomicInteger from the java.util.concurrent.atomic package:

import java.util.concurrent.atomic.AtomicInteger;

AtomicInteger counter = new AtomicInteger(0);
counter.incrementAndGet();

• or synchronization (synchronized) around the increment operation.

Thus, volatile is not suitable for correct counter incrementing in a multithreaded environment.