Home > Java > javaTutorial > What are the commonly used collection framework tools in Java function libraries?

What are the commonly used collection framework tools in Java function libraries?

WBOY
Release: 2024-05-04 18:03:01
Original
376 people have browsed it

Commonly used Java collection framework tools include List (sequential elements), Set (unique elements), Map (key-value pairs) and Queue (FIFO/LIFO). Example: You can convert a string array to a List and print it. For example, convert {"Alice", "Bob", "Carol", "Dave"} to [Alice, Bob, Carol, Dave] and print it.

Java 函数库中都有哪些常用集合框架工具?

Commonly used collection framework tools in Java function library

The Java collection framework provides rich interfaces and specific implementations for storing and operating data collections. Some common collection framework tools are listed below:

List

  • Allow duplicate elements
  • Maintain element insertion order
  • Commonly used implementations: ArrayList, LinkedList

Set

  • Duplicate elements are not allowed
  • Commonly used implementations: HashSet, TreeSet

##Map

    Storage The key-value pair
  • has a unique key, and the value can be repeated
  • Commonly used implementations:
  • HashMap, TreeMap

Queue

  • FIFO (first in, first out): The earliest inserted element is taken out first
  • LIFO (last in, first out) : The most recently inserted element is taken out first
  • Commonly used implementations:
  • ArrayDeque, LinkedList

Practical cases

Convert string array to List and print

// 创建一个字符串数组
String[] names = {"Alice", "Bob", "Carol", "Dave"};

// 将数组转换为 ArrayList
List<String> namesList = Arrays.asList(names);

// 打印 List 中的元素
for (String name : namesList) {
    System.out.println(name);
}
Copy after login

The above is the detailed content of What are the commonly used collection framework tools in Java function libraries?. For more information, please follow other related articles on the PHP Chinese website!

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template