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Thread Synchronization in Java

April 5, 2026

Thread Synchronization

Prevent race conditions when multiple threads access shared resources.

Synchronized Methods

public class Counter {
    private int count = 0;
    
    public synchronized void increment() {
        count++;
    }
    
    public synchronized int getCount() {
        return count;
    }
}

// Synchronized block
synchronized(this) {
    // Critical section
}

Key Points

  • synchronized ensures only one thread executes at a time.
  • Synchronized methods vs blocks (finer control).
  • Wait/notify for thread communication.
  • Deadlock risk with multiple locks.
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