jdk1.5后增加的线程安全的队列ConcurrentLinkedQueue的用法

1.最简单的Helloworld.
需要注意的是这个size()也是不同步的，和list一样，要得到需要遍历一次。
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;


public class testConcurrentLinkedQueue {
   public static void main(String[] args) {
   Queue<String> queue=new ConcurrentLinkedQueue<String>();
   queue.add("aa");
   queue.add("bb");
   queue.add("cc");
   queue.add("dd");
   queue.add("ee");
   System.out.println(queue.poll());
   System.out.println(queue.poll());
   System.out.println(queue.poll());
   System.out.println(queue.poll());
   System.out.println(queue.poll());
   System.out.println(queue.poll());   
}
}
2.含有优先级的，缺点优先级越多，分支越多。
import java.util.PriorityQueue;
import java.util.concurrent.ConcurrentLinkedQueue;

public class PriorityQueueTest {

    public static void main(String[] args) {
        ConcurrentLinkedQueue<String> highPriority = new ConcurrentLinkedQueue<String>(); //高优先级
        ConcurrentLinkedQueue<String> lowPriority = new ConcurrentLinkedQueue<String>();  //低优先级
        
        highPriority.add("aaa");
        highPriority.add("bbb");
        highPriority.add("111");
        
        lowPriority.add("ccc");
        lowPriority.add("ddd");
        lowPriority.add("222");
        
        int i = 0 ,j = 0, k=0;
        while(true){
            while(true){
                if(!highPriority.isEmpty()){
                    System.out.print(highPriority.remove());
                    i++;
                    k++;
                    System.out.println(", i = "+i+", k="+k);
                    break;
                }
                if(!lowPriority.isEmpty()){
                    System.out.print(lowPriority.remove());
                    j++;
                    k++;
                    System.out.println(", j = "+j+", k="+k);
                    break;
                }
                break;
            }
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}