class ShareResource {
private Integer number = 1;
private Lock lock = new ReentrantLock();
private Condition c1 = lock.newCondition();
private Condition c2 = lock.newCondition();
private Condition c3 = lock.newCondition();
public void print5() {
lock.lock();
try {
while (number != 1) {
c1.await();
}
for (int i = 1; i <= 5; i++) {
System.out.println(Thread.currentThread().getName() + ":" + i);
}
number = 2;
c2.signal();
} catch (Exception e) {
} finally {
lock.unlock();
}
}
public void print10() {
lock.lock();
try {
while (number != 2) {
c2.await();
}
for (int i = 1; i <= 10; i++) {
System.out.println(Thread.currentThread().getName() + ":" + i);
}
number = 3;
c3.signal();
} catch (Exception e) {
} finally {
lock.unlock();
}
}
public void print15() {
lock.lock();
try {
while (number != 3) {
c3.await();
}
for (int i = 1; i <= 15; i++) {
System.out.println(Thread.currentThread().getName() + ":" + i);
}
number = 1;
c1.signal();
} catch (Exception e) {
} finally {
lock.unlock();
}
}
public static void main(String[] args) {
ShareResource shareResource = new ShareResource();
new Thread(() -> {
for (int i = 0; i < 10; i++) {
shareResource.print5();
}
}, "A").start();
new Thread(() -> {
for (int i = 0; i < 10; i++) {
shareResource.print10();
}
}, "B").start();
new Thread(() -> {
for (int i = 0; i < 10; i++) {
shareResource.print15();
}
}, "C").start();
}
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