How to read input string data in java

The methods for reading string data in Java are: Scanner class: parsing basic types and strings. BufferedReader class: Read text and split it. Console class: Convenient reading of console input (Java 9 only).

Java reads input string data

Java provides a variety of methods to read input String data, including:

1. Scanner class

The Scanner class is one of the most common ways to read text input. It provides a set of methods for parsing primitive types and strings.

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        // 创建 Scanner 对象
        Scanner scanner = new Scanner(System.in);

        // 从控制台读取字符串
        String input = scanner.nextLine();

        // 打印输入的字符串
        System.out.println(input);
    }
}

2. BufferedReader class

The BufferedReader class can be used to read text from a character input stream (such as the console). It provides a set of methods for reading lines and delimiters.

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) throws IOException {
        // 创建 BufferedReader 对象
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        // 从控制台读取字符串
        String input = reader.readLine();

        // 打印输入的字符串
        System.out.println(input);
    }
}

3. Console class

The Console class provides a convenient method to read console input, which was introduced in Java 9.

import java.util.Console;

public class Main {
    public static void main(String[] args) {
        // 获取 Console 对象
        Console console = System.console();

        // 从控制台读取字符串
        String input = console.readLine();

        // 打印输入的字符串
        System.out.println(input);
    }
}

These methods can effectively read input string data. Which method is chosen depends on the specific requirements of the application and the environment.

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