为什么我的变量不是从用户输入中存储的？JAVA

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入一个值:");
        String userInput = scanner.nextLine();
        System.out.println("你输入的是: " + userInput);
        scanner.close();
    }
}

int number = scanner.nextInt(); // 读取整数

// 确保不要在其他地方关闭System.in

try {
    int number = scanner.nextInt();
} catch (InputMismatchException e) {
    System.out.println("请输入一个整数");
    scanner.next(); // 清除错误的输入
}

BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String userInput = reader.readLine();