public class C {
public static void main(String[] args) {
Data3 data = new Data3();
new Thread(()->{
for (int i = 0; i < 10; i++) {
data.printA();
}
},"A").start();
new Thread(()->{
for (int i = 0; i < 10; i++) {
data.printB();
}
},"B").start();
new Thread(()->{
for (int i = 0; i < 10; i++) {
data.printC();
}
},"C").start();
}
}
class Data3{
private Lock lock = new ReentrantLock();
Condition condition1 = lock.newCondition();
Condition condition2 = lock.newCondition();
Condition condition3 = lock.newCondition();
private int number = 1;
public void printA() {
lock.lock();
try {
while (number != 1) {
condition1.await();
}
System.out.println(Thread.currentThread().getName() + "-->A");
number = 2;
condition2.signal();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
lock.unlock();
}
}
public void printB() {
lock.lock();
try {
while (number != 2) {
condition2.await();
}
System.out.println(Thread.currentThread().getName() + "-->B");
number = 3;
condition3.signal();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
lock.unlock();
}
}
public void printC() {
lock.lock();
try {
while (number != 3) {
condition3.await();
}
System.out.println(Thread.currentThread().getName() + "-->C");
number = 1;
condition1.signal();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
lock.unlock();
}
}
}
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