import java.util.concurrent.locks.*;
class Counter {
private int count = 0;
private Lock lock = new ReentrantLock();
public void increment() {
lock.lock();
try {
count++;
} finally {
lock.unlock();
}
}
public int getCount() {
return count;
}
}
class Main {
public static void main(String[] args) {
Counter counter = new Counter();
Thread thread1 = new Thread(() -> {
for (int i = 0; i < 100; i++) {
counter.increment();
}
});
Thread thread2 = new Thread(() -> {
for (int i = 0; i < 100; i++) {
counter.increment();
}
});
thread1.start();
thread2.start();
try {
thread1.join();
thread2.join();
} catch (InterruptedException e) {
System.out.println("Threads interrupted.");
}
System.out.println("Counter value: " + counter.getCount());
}
}
