从Java System.in发出读取输入

import java.util.Scanner;

public class ReadInput {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入一个数字：");
        int number = scanner.nextInt();
        System.out.println("您输入的数字是：" + number);
    }
}

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

public class ReadInput {
    public static void main(String[] args) {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        System.out.println("请输入一行文字：");
        try {
            String line = reader.readLine();
            System.out.println("您输入的文字是：" + line);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}