说一下array list
时间: 2023-03-20 07:00:37 浏览: 66
Array List(数组列表)是一种数据结构,它基于数组并提供了动态扩展大小的能力。在 Array List 中,数组用于存储元素,而列表则提供了一个可以动态添加、删除、查找和排序元素的接口。Array List 中的元素可以是任何类型,包括基本类型和对象类型。与 Java 数组不同的是,Array List 允许添加和删除元素,而不需要手动移动元素。由于 Array List 基于数组,因此可以通过索引随机访问元素。Array List 是 Java 集合框架中的一种,也是 Java 开发中经常使用的数据结构之一。
相关问题
list和array list区别
list和array list都是Python中的数据结构,但是它们有一些区别。list是Python内置的一种数据类型,可以存储任意类型的数据,包括数字、字符串、列表等。而array list是Python标准库中的一种数据类型,它是基于数组实现的,只能存储同一种数据类型的元素。
另外,由于array list是基于数组实现的,因此在插入和删除元素时,需要移动其他元素,效率较低。而list则可以在任意位置插入和删除元素,效率较高。
array based list
An array-based list is a data structure that stores a collection of elements in an array. It provides a way to access elements in the list by their index position, and allows for adding, removing, and modifying elements.
In an array-based list, the elements are stored in contiguous memory locations, which means that elements can be accessed quickly by their index position. The array size is fixed at the time of creation, and the list size cannot exceed this limit. When elements are added or removed, the array may need to be resized, which can be a costly operation.
The advantage of an array-based list is that it provides constant-time access to elements by their index position. However, it may not be efficient for inserting or deleting elements in the middle of the list, as all the elements after the insertion or deletion point need to be shifted to make room or close the gap.
Overall, an array-based list is a simple and efficient data structure for storing a collection of elements, but its performance depends on the specific use case and the operations performed on the list.