The PriorityQueue in Java is a datastructure, that sorts the elements it contains. Excerpt from the Javadoc: The elements of the priority queue are ordered ... ... <看更多>
jdk8u/jdk/src/share/classes/java/util/PriorityQueue.java ... A priority queue does not permit {@code null} elements. * A priority queue relying on natural ... ... <看更多>