


Use java's Scanner.next() function to read user-entered strings from the console
Use java's Scanner.next() function to read user input strings from the console
In Java programming, it is often necessary to read user input from the console. The Scanner class is one of the commonly used tools in Java to obtain user input from the console. The Scanner class provides several methods for reading user input, one of the most commonly used is the next() function.
next() function is used to read the string entered by the user from the console. The read range is the characters from the current position to the next space or newline character, and then the read characters String returned.
The following is a sample code that demonstrates how to use the next() function to obtain the string entered by the user from the console:
import java.util.Scanner; public class UserInputExample { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.println("请输入您的姓名:"); String name = scanner.next(); System.out.println("请输入您的年龄:"); int age = scanner.nextInt(); System.out.println("您的姓名是:" + name); System.out.println("您的年龄是:" + age); } }
In the above sample code, we first create a Scanner object scanner, which will read user input from standard input (System.in).
Then, we get the string entered by the user from the console by calling the scanner.next() function and store it in a string variable named name.
Next, we get the integer entered by the user from the console by calling the scanner.nextInt() function and store it in an integer variable named age.
Finally, we print the obtained name and age to the console.
It should be noted that the next() function can only read the string before the next space or newline character. If you need to read the entire line of input, you can use the nextLine() function.
In addition, it is necessary to note that the data type entered by the user matches the expected data type, otherwise an exception may be thrown. In the sample code above, we used the nextInt() function to read the age, so the user input should be an integer.
To summarize, using the next() function of the Scanner class can easily read the string entered by the user from the console. In practical applications, we can use different Scanner functions to read different types of data as needed. I hope this article helps you understand how to use the next() function to read user-entered strings from the console.
The above is the detailed content of Use java's Scanner.next() function to read user-entered strings from the console. For more information, please follow other related articles on the PHP Chinese website!

Start Spring using IntelliJIDEAUltimate version...

When using MyBatis-Plus or other ORM frameworks for database operations, it is often necessary to construct query conditions based on the attribute name of the entity class. If you manually every time...

Java...

How does the Redis caching solution realize the requirements of product ranking list? During the development process, we often need to deal with the requirements of rankings, such as displaying a...

Conversion of Java Objects and Arrays: In-depth discussion of the risks and correct methods of cast type conversion Many Java beginners will encounter the conversion of an object into an array...

Solutions to convert names to numbers to implement sorting In many application scenarios, users may need to sort in groups, especially in one...

Detailed explanation of the design of SKU and SPU tables on e-commerce platforms This article will discuss the database design issues of SKU and SPU in e-commerce platforms, especially how to deal with user-defined sales...

How to set the SpringBoot project default run configuration list in Idea using IntelliJ...


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Dreamweaver Mac version
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

WebStorm Mac version
Useful JavaScript development tools