public class SynchronizedExample {
private int count = 0;
public synchronized void increment() {
count++;
}
public synchronized int getCount() {
return count;
}
}
public class ReentrantLockExample {
private int count = 0;
private Lock lock = new ReentrantLock();
public void increment() {
lock.lock();
try {
count++;
} finally {
lock.unlock();
}
}
public int getCount() {
lock.lock();
try {
return count;
} finally {
lock.unlock();
}
}
}
public class ReadWriteLockExample {
private Map<String, String> data = new HashMap<>();
private ReadWriteLock lock = new ReentrantReadWriteLock();
public void write(String key, String value) {
lock.writeLock().lock();
try {
data.put(key, value);
} finally {
lock.writeLock().unlock();
}
}
public String read(String key) {
lock.readLock().lock();
try {
return data.get(key);
} finally {
lock.readLock().unlock();
}
}
}
