package Question16_3;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class Chopstick {
private Lock lock;
public Chopstick() {
lock = new ReentrantLock();
}
public boolean pickUp() {
return lock.tryLock();
}
public void putDown() {
lock.unlock();
}
}