Synchronizing Specific Object
Synchronizing on a Specific Object
The join() calls ensure that the main thread waits for both threads to finish before printing the result.We can use a separate lock object:
class Counter {
int count = 0;
private final Object lock = new Object();
void increment() {
synchronized (lock) {
count++;
}
}
}
public class SynchroObject_Lock_Demo {
public static void main(String[] args) throws InterruptedException {
Counter counter = new Counter();
Thread t1 = new Thread(() -> {
for (int i = 0; i < 1000; i++) {
counter.increment();
}
});
Thread t2 = new Thread(() -> {
for (int i = 0; i < 1000; i++) {
counter.increment();
}
});
t1.start();
t2.start();
t1.join();
t2.join();
System.out.println("Final count: " + counter.count);
}
}