本文整理匯總了Java中java.util.concurrent.BlockingQueue.peek方法的典型用法代碼示例。如果您正苦於以下問題：Java BlockingQueue.peek方法的具體用法？Java BlockingQueue.peek怎麽用？Java BlockingQueue.peek使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類java.util.concurrent.BlockingQueue的用法示例。
在下文中一共展示了BlockingQueue.peek方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: main
import java.util.concurrent.BlockingQueue; //導入方法依賴的package包/類
public static void main(String[] args) throws InterruptedException {
BlockingQueue<String> queue = new ArrayBlockingQueue<>(1);
queue.add("add");
//
String peek = queue.peek();
System.out.println(peek);
queue.poll();
boolean offer = queue.offer("offer");
if (!offer) {
System.out.println("it is't possible to do so immediately");
}
System.out.println(queue.take());
queue.put("put operation");
System.out.println(queue.take());
}
示例2: peek
import java.util.concurrent.BlockingQueue; //導入方法依賴的package包/類
/**
* Peek, like poll, provides no strict consistency.
*/
@Override
public E peek() {
BlockingQueue<E> q = this.getFirstNonEmptyQueue(0);
if (q == null) {
return null;
} else {
return q.peek();
}
}
示例3: headSlowTimeMills
import java.util.concurrent.BlockingQueue; //導入方法依賴的package包/類
public long headSlowTimeMills(BlockingQueue<Runnable> q) {
long slowTimeMills = 0;
final Runnable peek = q.peek();
if (peek != null) {
RequestTask rt = BrokerFastFailure.castRunnable(peek);
slowTimeMills = rt == null ? 0 : this.messageStore.now() - rt.getCreateTimestamp();
}
if (slowTimeMills < 0)
slowTimeMills = 0;
return slowTimeMills;
}