importorg.apache.commons.collections4.queue.CircularFifoQueue; 1. 然后,我们可以创建一个CircularFifoQueue对象,并指定队列的最大容量。 CircularFifoQueue<Integer>queue=newCircularFifoQueue<>(5); 1. 在上面的示例中,我们创建了一个最大容量为5的CircularFifoQueue对象。接下来,我们可以使用add方法向队列中添加...
Design your implementation of the circular queue. The circular queue is a linear data structure in which the operations are performed based on FIFO (First In First Out) principle and the last position is connected back to the first position to make a circle. It is also called "Ring Buffer"...
once the queue becomes full, we cannot insert the next element even if there is a space in front of the queue. But using the circular queue, we can use the space to store new values.
offer(element); } // 出队操作:当队列空时会阻塞 public synchronized T dequeue() throws InterruptedException { while (queue.isEmpty()) { wait(); // 如果队列为空,则等待 } if (queue.size() == capacity) { notifyAll(); // 如果队列已满且有线程在等待入队,则唤醒它们 } return queue.poll(...
might well be easier and cleaner to implement--as well as more efficient--if thePoint's instance variables were directly available to theRectangleclass. Outside of the geometry package, however, the details of implementations are hidden from the rest of the world, giving you the freedom to ch...
We could override the locale for the whole program — or we could just use formatting, as described in the next topic, Formatting. Formatting Stream objects that implement formatting are instances of either PrintWriter, a character stream class, or PrintStream, a byte stream class. Note: The ...
Queue<Customer>expressLane=newCircularArrayQueue<>(100);expressLane.add(newCustomer("Harry")); With this approach, if you change your mind, you can easily use a different implementation. You only need to change your program in one place -- in the constructor call. If you decide that a Li...
ConcurrentCircularArrayQueue(int capacity) { int actualCapacity = Pow2.roundToPowerOfTwo(capacity); mask = actualCapacity - 1; buffer = CircularArrayOffsetCalculator.allocate(actualCapacity); } /** * @param index desirable element index * @param mask (length - 1) * @return the offset...
package com.daley.circularqueue;import java.util.Scanner;publicclassCircularQueue{publicstaticvoidmain(String[]args){//测试一把System.out.println("测试数组模拟环形队列的案例~~~");// 创建一个环形队列CircularArrayqueue=newCircularArray(4);//说明设置4, 其队列的有效数据最大是3charkey=' ';// 接收...
Use the atomic method computeIfAbsent of ConcurrentHashMap to do compound logic operations to determine whether the Key has Value. If it does not exist, put the result of the Lambda expression running into the Map as Value, that is, create a new LongAdder object, and finally return Value....