1.LinkedBlockingDeque

public class LinkedBlockingDeque
     
      extends AbstractQueue
      
       implements BlockingDeque
       
        , Serializable
       
      
     

2.主要方法

• takeFirst()和takeLast()：分别返回类表中第一个和最后一个元素，返回的元素会从类表中移除。如果列表为空，调用的方法的线程将会被阻塞直达列表中有可用元素。
• getFirst()和getLast():分别返回类表中第一个和最后一个元素，返回的元素不会从列表中移除。如果列表为空，则抛出NoSuckElementException异常。
• peek()、peekFirst()和peekLast():分别返回列表中第一个元素和最后一个元素，返回元素不会被移除。如果列表为空返回null.
• poll()、pollFirst()和pollLast():分别返回类表中第一个和最后一个元素，返回的元素会从列表中移除。如果列表为空，返回Null。

public class Client implements Runnable {    private LinkedBlockingDeque
     
       requestList;    public Client(LinkedBlockingDeque
      
        requestList) {        super();        this.requestList = requestList;    }    @Override    public void run() {        for (int i = 0; i < 3; i++) {            for (int j = 0; j < 5; j++) {                StringBuilder request = new StringBuilder();                request.append(i);                request.append(":");                request.append(j);                try {                    requestList.put(request.toString());                } catch (InterruptedException e) {                    e.printStackTrace();                }                System.out.println("Clint: " + request + " " + new Date());            }            try {                TimeUnit.SECONDS.sleep(2);            } catch (InterruptedException e) {                e.printStackTrace();            }        }        System.out.println("Client: End");    }}
      
     

public class LinkedBlockingDequeMain {    public static void main(String[] args) throws Exception {        LinkedBlockingDeque
     
       list=new LinkedBlockingDeque
      
       (3);        Client client=new Client(list);        Thread thread=new Thread(client);        thread.start();            for (int i = 0; i <5; i++) {            for (int j =0; j <3; j++) {                String request=list.take();                System.out.println("Main:Request:"+request+" at "+new Date()+" Size "+list.size());            }            TimeUnit.MILLISECONDS.sleep(300);        }        System.out.println("Main:End");    }}