How do I use synchronized blocks in Java?

How do I use synchronized blocks in Java?

You can use synchronized blocks in Java to control access to a block of code by multiple threads. This ensures that only one thread can execute the block at a time.

Can you show me a code example?

Sure! Here's a simple example:

public class Counter {
    private int count = 0;

    public void increment() {
        synchronized(this) {
            count++;
        }
    }

    public int getCount() {
        return count;
    }
}

What happens if I don't use synchronized blocks?

If you don't use synchronized blocks, multiple threads may access and modify shared data simultaneously, leading to inconsistent or incorrect results.

Are there any alternatives to synchronized blocks?

Yes, alternatives include using ReentrantLock, ReadWriteLock, or higher-level concurrency utilities from the java.util.concurrent package.