What does scan mean in java

The Scanner class in Java is an input processing class that allows developers to read data from different sources. It provides various methods for reading different types of data, such as nextInt(), nextDouble() and nextLine(). Uses include: 1. Reading user input from the console; 2. Reading data from files; 3. Extracting data from strings. Usage: Create a Scanner object and specify the input source; use the corresponding method to read data; close the Scanner object to release resources. Advantages: easy to use, supports multiple data types, and provides convenient input processing API.

Scanner class in Java

Scanner class in Java is an input Processing classes allow developers to easily read data from different input sources. It provides various methods, including nextInt(), nextDouble(), and nextLine(), for reading different types of data.

Purpose

##Scanner class is commonly used in the following scenarios:

Read user input from the console
• Read data from file
• Extract data from string

Use

To use

Scanner class, you need to follow the following steps:

Create a
1. Scanner object and specify the input source. For example:

Scanner scanner = new Scanner(System.in);

According to the data type, use the corresponding method to read the input. For example:

2. int age = scanner.nextInt();
   double weight = scanner.nextDouble();
   String name = scanner.nextLine();

After use, close the
3. Scanner object to release resources:

scanner.close();

Advantages

Using the

Scanner class has the following advantages:

Easy to use and understand
• Supports reading various data types
• Provides a convenient API to process input data

Example

Here is a simple example of reading user input:

Scanner scanner = new Scanner(System.in);

System.out.println("请输入你的姓名：");
String name = scanner.nextLine();

System.out.println("请输入你的年龄：");
int age = scanner.nextInt();

System.out.println("你的姓名是：" + name);
System.out.println("你的年龄是：" + age);

scanner.close();

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