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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