newpqueue.emplace("Javatpoint");cout<<"newpqueue = ";while(!newpqueue.empty( ) ) {cout<< newpqueue.front() <<" "; newpqueue.pop(); }return0; } 输出: Javatpoint is a computer science portal 复杂度 对emplace_back 进行一次调用。 数据竞争 队列中存在的所有元素都被修改,因为添加了一个...
NotNull(ConcurrentLinkedQueue.java:920) at java.util.concurrent.ConcurrentLinkedQueue.offer(ConcurrentLinkedQueue.java:327) at java.util.concurrent.ConcurrentLinkedQueue.add(ConcurrentLinkedQueue.java:297) at com.javaTpoint.ConcurrentLinkedQueueRemoveAllExample3.main(ConcurrentLinkedQueueRemoveAllExample3.java...
at com.javaTpoint.ArrayBlockingQueueRemoveIfExample3.main(ArrayBlockingQueueRemoveIfExample3.java:15) 如果指定的 Predicate 过滤器为 null,它将为您提供 NullPointerException,如上例所述。
Exception in thread "main" java.lang.NullPointerException at java.util.TreeMap.put(TreeMap.java:563) at java.util.TreeSet.add(TreeSet.java:255) at com.javaTpoint.ConcurrentLinkedQueueRetainAllExample3.main(ConcurrentLinkedQueueRetainAllExample3.java:13) 相關...
at java.util.concurrent.ConcurrentLinkedQueue.offer(ConcurrentLinkedQueue.java:327) at java.util.concurrent.ConcurrentLinkedQueue.add(ConcurrentLinkedQueue.java:297) at com.javaTpoint.ConcurrentLinkedQueueForEachExample4.main(ConcurrentLinkedQueueForEachExample4.java:7)...
Exception in thread "main" java.lang.NullPointerException at java.util.Objects.requireNonNull(Objects.java:203) at java.util.AbstractCollection.removeAll(AbstractCollection.java:371) at com.javaTpoint.ArrayBlockingQueueRemoveAllExample3.main(ArrayBlockingQueueRemoveAllExample3.java:16)...
Exception in thread "main" java.lang.NullPointerException at java.util.Objects.requireNonNull(Objects.java:203) Total no:[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20] at java.util.Collection.removeIf(Collection.java:410) at com.javaTpoint.Conc...
at com.javaTpoint.ArrayBlockingQueueRetainAllExample3.main(ArrayBlockingQueueRetainAllExample3.java:15) 由於TreeSet 不允許空元素,所以它會給出 NullPointerException,如上所示。 注:本文由純淨天空篩選整理自Java ArrayBlockingQueue retainAll() Method。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或...