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80 lines (69 loc) · 2.05 KB
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package chapter04;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
/**
* 6-3
*/
public class ThreadState {
private static Lock lock = new ReentrantLock();
public static void main(String[] args) {
new Thread(new TimeWaiting(), "TimeWaitingThread").start();
new Thread(new Waiting(), "WaitingThread").start();
// 使用两个Blocked线程，一个获取锁成功，另一个被阻塞
new Thread(new Blocked(), "BlockedThread-1").start();
new Thread(new Blocked(), "BlockedThread-2").start();
new Thread(new Sync(), "SyncThread-1").start();
new Thread(new Sync(), "SyncThread-2").start();
}
/**
* 该线程不断的进行睡眠
*/
static class TimeWaiting implements Runnable {
@Override
public void run() {
while (true) {
SleepUtils.second(100);
}
}
}
/**
* 该线程在Waiting.class实例上等待
*/
static class Waiting implements Runnable {
@Override
public void run() {
while (true) {
synchronized (Waiting.class) {
try {
Waiting.class.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}
/**
* 该线程在Blocked.class实例上加锁后，不会释放该锁
*/
static class Blocked implements Runnable {
public void run() {
synchronized (Blocked.class) {
while (true) {
SleepUtils.second(100);
}
}
}
}
static class Sync implements Runnable {
@Override
public void run() {
lock.lock();
try {
SleepUtils.second(100);
} finally {
lock.unlock();
}
}
}
}