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39 lines
827 B
Kotlin
39 lines
827 B
Kotlin
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/**
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* File: queue.kt
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* Created Time: 2024-01-25
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* Author: curtishd (1023632660@qq.com)
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*/
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package chapter_stack_and_queue
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import java.util.*
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/* Driver Code */
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fun main() {
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/* 初始化队列 */
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val queue = LinkedList<Int>()
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/* 元素入队 */
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queue.offer(1)
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queue.offer(3)
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queue.offer(2)
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queue.offer(5)
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queue.offer(4)
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println("队列 queue = $queue")
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/* 访问队首元素 */
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val peek = queue.peek()
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println("队首元素 peek = $peek")
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/* 元素出队 */
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val pop = queue.poll()
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println("出队元素 pop = $pop，出队后 queue = $queue")
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/* 获取队列的长度 */
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val size = queue.size
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println("队列长度 size = $size")
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/* 判断队列是否为空 */
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val isEmpty = queue.isEmpty()
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println("队列是否为空 = $isEmpty")
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}
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