交替打印
作者：互联网
使用 condition 交替打印字符串 A、B、C
public class PrintTest {
private volatile static int num = 1;
private static ReentrantLock lock = new ReentrantLock();
private final static Condition conditionA = lock.newCondition();
private final static Condition conditionB = lock.newCondition();
private final static Condition conditionC = lock.newCondition();
public static void main(String[] args) {
Thread threadA = new Thread() {
@Override
public void run() {
try {
lock.lock();
while (num != 1) {
conditionA.wait();
}
num = 2;
System.out.println("A");
conditionB.signalAll();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
if (lock.isHeldByCurrentThread()) {
lock.unlock();
}
}
}
};
Thread threadB = new Thread() {
@Override
public void run() {
try {
lock.lock();
while (num != 2) {
conditionA.wait();
}
num = 3;
System.out.println("B");
conditionC.signalAll();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
if (lock.isHeldByCurrentThread()) {
lock.unlock();
}
}
}
};
Thread threadC = new Thread() {
@Override
public void run() {
try {
lock.lock();
while (num != 3) {
conditionA.wait();
}
num = 1;
System.out.println("C");
conditionA.signalAll();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
if (lock.isHeldByCurrentThread()) {
lock.unlock();
}
}
}
};
threadA.start();
threadB.start();
threadC.start();
}
}
输出
A B C Process finished with exit code 0
标签：Thread,lock,打印,private,交替,num,static,conditionA 来源： https://www.cnblogs.com/guanbin-529/p/16104672.html