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import java.util.concurrent.TimeUnit;
class MyThread implements Runnable {
private Queue queue;
public MyThread(Queue queue) {
this.queue = queue;
}
@Override
public void run() {
try {
System.out.println(Thread.currentThread().getName() + " invode queue.print()");
this.queue.print();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public class SyncQueue {
public static void main(String[] args) throws InterruptedException {
Queue queue = new Queue();
for (int i = 0; i < 10; i++) {
new Thread(new MyThread(queue)).start();
TimeUnit.MILLISECONDS.sleep(100);
}
}
}
class Queue {
synchronized public void print() throws InterruptedException {
TimeUnit.SECONDS.sleep(3);
System.out.println(Thread.currentThread().getName() + " return");
}
}
Thread-0 invoke queue.print()
Thread-1 invoke queue.print()
Thread-2 invoke queue.print()
Thread-3 invoke queue.print()
Thread-4 invoke queue.print()
Thread-5 invoke queue.print()
Thread-6 invoke queue.print()
Thread-7 invoke queue.print()
Thread-8 invoke queue.print()
Thread-9 invoke queue.print()
Thread-0 return
Thread-9 return
Thread-8 return
Thread-7 return
Thread-6 return
Thread-5 return
Thread-4 return
Thread-3 return
Thread-2 return
Thread-1 return
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
class MyThread implements Runnable {
private Queue queue;
public MyThread(Queue queue) {
this.queue = queue;
}
@Override
public void run() {
try {
System.out.println(Thread.currentThread().getName()
+ " invode queue.print()");
this.queue.print();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public class SyncQueue {
public static void main(String[] args) throws InterruptedException {
Queue queue = new Queue();
for (int i = 0; i < 10; i++) {
new Thread(new MyThread(queue)).start();
}
}
}
class Queue {
private Lock lock = new ReentrantLock(true);
public void print() throws InterruptedException {
try {
lock.lock();
System.out.println(Thread.currentThread().getName() + " return");
} finally {
lock.unlock();
}
}
}
package com.zhyea.test;
import java.util.concurrent.TimeUnit;
class MyThread implements Runnable {
private Queue queue;
public MyThread(Queue queue) {
this.queue = queue;
}
@Override
public void run() {
try {
System.out.println(Thread.currentThread().getName() + " invode queue.print()");
this.queue.print();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public class MyTest {
public static void main(String[] args) throws InterruptedException {
Queue queue = new Queue();
for (int i = 0; i < 10; i++) {
new Thread(new MyThread(queue)).start();
}
}
}
class Queue {
synchronized public void print() throws InterruptedException {
TimeUnit.SECONDS.sleep(3);
System.out.println(Thread.currentThread().getName() + " return");
}
}
执行了一半我就停止运行了,也能说明问题了:
Thread-1 invode queue.print()
Thread-5 invode queue.print()
Thread-4 invode queue.print()
Thread-0 invode queue.print()
Thread-3 invode queue.print()
Thread-2 invode queue.print()
Thread-7 invode queue.print()
Thread-6 invode queue.print()
Thread-8 invode queue.print()
Thread-9 invode queue.print()