LinkedBlockingQueue的学习

package example;

import java.util.Iterator;

import java.util.concurrent.LinkedBlockingQueue;

import java.util.concurrent.TimeUnit;

public class LinkedBlockingQueueTest {
public static void test(){
LinkedBlockingQueue<String> queue=new LinkedBlockingQueue<String>();
queue.offer("1");
queue.offer("2");
queue.offer("3");
queue.offer("4");
Iterator<String> iterator=queue.iterator();
System.out.println("初始队列");
while (iterator.hasNext()) {
System.out.println(iterator.next());
}

queue.poll();//取走队头，非阻塞
System.out.println("取走一个后队头为："+queue.peek());
queue.poll();//取走队头，非阻塞
queue.poll();//取走队头，非阻塞
queue.poll();//取走队头，非阻塞
String re1=queue.poll();//取走队头，非阻塞,没有就返回null
System.out.println("re1: "+re1);
try {
String result=queue.poll(4, TimeUnit.SECONDS);//等待4秒，如果没取到返回null
System.out.println("等待4秒后result:"+result);
queue.offer("5");
result=queue.take();//取走队头，阻塞方式,如果没取到一直等待
System.out.println("take result: "+result);
} catch (InterruptedException e) {
e.printStackTrace();
}
iterator=queue.iterator();

while (iterator.hasNext()) {
System.out.println(iterator.next());
}

}
/**
* @param args
*/
public static void main(String[] args) {
test();
}

}