Home Java javaTutorial How to assign values ​​using enumeration types in Java

How to assign values ​​using enumeration types in Java

Jan 31, 2024 pm 06:33 PM
java enumeration type key value pair Settings

How to assign values ​​using enumeration types in Java

What is an enumeration type?

The enumeration type (enum) is a special data type in the Java programming language, used to represent a set of predefined constants. Each constant in an enumeration type represents a possible value of that type.

How to set values ​​using enumeration types?

To set a value using an enumeration type, you can use a constant of the enumeration type. Constants of enumeration types can be accessed through the dot operator (.). For example, if you have an enumeration type named Color that contains three constants: RED, GREEN, and BLUE, then You can set the value of the variable color of type Color as follows:

Color color = Color.RED;
Copy after login

Common usage of enumeration types

Enumeration Types have many common uses in Java programming, some of which include:

  • represents a set of predefined constants.
  • Control program flow.
  • As a data structure.
  • Stored as key-value pairs.

Advantages of Enumeration Types

There are many advantages to using enumeration types, some of which include:

  • Readability powerful. Constant names in enumeration types are often intuitive, which makes the code easier to read and understand.
  • High security. Constants in enumeration types are compile-time constants, which means they cannot be modified while the program is running. This helps prevent errors and unexpected behavior.
  • Strong scalability. Enumeration types can be easily extended by simply adding new constants.

Disadvantages of enumeration types

There are also some disadvantages to using enumeration types, some of which include:

  • Performance overhead. Enumerated types have a higher performance overhead than primitive types such as int and String.
  • Memory overhead. Enumerated types take up more memory space than primitive types.

Conclusion

Enumeration types are a very useful tool in Java programming. They can be used to represent a predefined set of constants, to control program flow, as data structures, and as key-value stores. Enumeration types have the advantages of high readability, high security, and strong scalability, but they also have disadvantages such as performance overhead and memory overhead. When using enumeration types, you need to weigh these advantages and disadvantages to determine whether they are suitable for your application.

Specific code example

// 定义一个名为 Color 的枚举类型
enum Color {
  RED,
  GREEN,
  BLUE
}

// 使用 Color 枚举类型设置变量的值
Color color = Color.RED;

// 打印变量的值
System.out.println(color); // 输出:RED
Copy after login

In this example, we define an enumeration type named Color, which contains three constants : RED, GREEN and BLUE. We then set the value of the variable color using the Color enumeration type. Finally, we print the value of the variable color.

The above is the detailed content of How to assign values ​​using enumeration types in Java. For more information, please follow other related articles on the PHP Chinese website!

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

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Chat Commands and How to Use Them
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Break or return from Java 8 stream forEach? Break or return from Java 8 stream forEach? Feb 07, 2025 pm 12:09 PM

Java 8 introduces the Stream API, providing a powerful and expressive way to process data collections. However, a common question when using Stream is: How to break or return from a forEach operation? Traditional loops allow for early interruption or return, but Stream's forEach method does not directly support this method. This article will explain the reasons and explore alternative methods for implementing premature termination in Stream processing systems. Further reading: Java Stream API improvements Understand Stream forEach The forEach method is a terminal operation that performs one operation on each element in the Stream. Its design intention is

What is the method of converting Vue.js strings into objects? What is the method of converting Vue.js strings into objects? Apr 07, 2025 pm 09:18 PM

Using JSON.parse() string to object is the safest and most efficient: make sure that strings comply with JSON specifications and avoid common errors. Use try...catch to handle exceptions to improve code robustness. Avoid using the eval() method, which has security risks. For huge JSON strings, chunked parsing or asynchronous parsing can be considered for optimizing performance.

How to Run Your First Spring Boot Application in Spring Tool Suite? How to Run Your First Spring Boot Application in Spring Tool Suite? Feb 07, 2025 pm 12:11 PM

Spring Boot simplifies the creation of robust, scalable, and production-ready Java applications, revolutionizing Java development. Its "convention over configuration" approach, inherent to the Spring ecosystem, minimizes manual setup, allo

What are the best practices for converting XML into images? What are the best practices for converting XML into images? Apr 02, 2025 pm 08:09 PM

Converting XML into images can be achieved through the following steps: parse XML data and extract visual element information. Select the appropriate graphics library (such as Pillow in Python, JFreeChart in Java) to render the picture. Understand the XML structure and determine how the data is processed. Choose the right tools and methods based on the XML structure and image complexity. Consider using multithreaded or asynchronous programming to optimize performance while maintaining code readability and maintainability.

Java Program to insert an element at the Bottom of a Stack Java Program to insert an element at the Bottom of a Stack Feb 07, 2025 am 11:59 AM

A stack is a data structure that follows the LIFO (Last In, First Out) principle. In other words, The last element we add to a stack is the first one to be removed. When we add (or push) elements to a stack, they are placed on top; i.e. above all the

How to distinguish between closing a browser tab and closing the entire browser using JavaScript? How to distinguish between closing a browser tab and closing the entire browser using JavaScript? Apr 04, 2025 pm 10:21 PM

How to distinguish between closing tabs and closing entire browser using JavaScript on your browser? During the daily use of the browser, users may...

What is the process of converting XML into images? What is the process of converting XML into images? Apr 02, 2025 pm 08:24 PM

To convert XML images, you need to determine the XML data structure first, then select a suitable graphical library (such as Python's matplotlib) and method, select a visualization strategy based on the data structure, consider the data volume and image format, perform batch processing or use efficient libraries, and finally save it as PNG, JPEG, or SVG according to the needs.

Comparing Two ArrayList In Java Comparing Two ArrayList In Java Feb 07, 2025 pm 12:03 PM

This guide explores several Java methods for comparing two ArrayLists. Successful comparison requires both lists to have the same size and contain identical elements. Methods for Comparing ArrayLists in Java Several approaches exist for comparing Ar

See all articles