public void first() {
try {
ThreadUtils.sleep(5000);
System.out.println("first");
sem1.release();
} catch (Exception e) {
e.printStackTrace();
}
}
public void third() {
try {
sem2.acquire();
sem2.release();
ThreadUtils.sleep(1000);
System.out.println("third");
} catch (Exception e) {
e.printStackTrace();
}
}
public void second() {
try {
sem1.acquire(); // since the CF alreay holds the sem1, this has to be wait
sem1.release();
ThreadUtils.sleep(3000);
System.out.println("second");
sem2.release();
} catch (Exception e) {
e.printStackTrace();
}
}