How to eat carriage return in java

The best practice for handling carriage return characters is: 1. Use the nextLine() method of the Scanner class; 2. Use the readLine() method of the BufferedReader class; 3. Use regular expressions \r\n to match the return Cart and newline character combination.

Best practices for handling carriage returns in Java

The carriage return (CR) character in Java The Chinese representation is '\r'. It is commonly used for line breaks in Windows systems. For reading data in a text file or from the terminal, the carriage return character is encountered.

The best practice for handling carriage returns

The best practice for handling carriage returns is:

• Use the Scanner class : Scanner class provides the nextLine() method, which can read the entire line (including carriage return characters) and return a string.
• Use the BufferedReader class: BufferedReaderThe class also provides the readLine() method, which can read the entire line, but it will not return car character.
• Use regular expressions: You can use regular expressions \r\n to match carriage return and line feed character combinations. This is convenient when reading data from text files, since both Windows and Unix systems use this combination as a newline character.

Sample Code

The following sample code demonstrates how to use the Scanner class to read lines containing carriage return characters:

<code class="java">import java.util.Scanner;

public class ReadWithScanner {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        // 读取一行，包括回车
        String line = scanner.nextLine();

        // 打印输入的行
        System.out.println(line);
    }
}</code>

The following example code demonstrates how to use the BufferedReader class to read a line containing a carriage return character:

<code class="java">import java.io.BufferedReader;
import java.io.FileReader;

public class ReadWithBufferedReader {

    public static void main(String[] args) {
        try {
            // 打开文件
            BufferedReader reader = new BufferedReader(new FileReader("myfile.txt"));

            // 读取一行（不包括回车）
            String line = reader.readLine();

            // 打印输入的行
            System.out.println(line);

            // 关闭文件
            reader.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}</code>

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