如何在Java中存储用户输入

import java.util.Scanner;

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

        System.out.print("请输入一个整数：");
        int num = scanner.nextInt();

        System.out.println("您输入的整数是：" + num);

        System.out.print("请输入一个浮点数：");
        double decimal = scanner.nextDouble();

        System.out.println("您输入的浮点数是：" + decimal);

        System.out.print("请输入一个字符串：");
        String str = scanner.nextLine();

        System.out.println("您输入的字符串是：" + str);
    }
}

import java.util.Scanner;

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

        System.out.print("请输入数组长度：");
        int length = scanner.nextInt();
        scanner.nextLine(); // 读取换行符

        int[] numbers = new int[length];

        for (int i = 0; i < length; i++) {
            System.out.print("请输入第 " + (i+1) + " 个数：");
            numbers[i] = scanner.nextInt();
            scanner.nextLine(); // 读取换行符
        }

        System.out.println("您输入的数组是：");
        for (int num : numbers) {
            System.out.print(num + " ");
        }
    }
}

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

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

        List<Integer> numbers = new ArrayList<>();

        System.out.println("请输入一组整数（输入-1结束）：");
        int input = scanner.nextInt();
        scanner.nextLine(); // 读取换行符

        while (input != -1) {
            numbers.add(input);
            input = scanner.nextInt();
            scanner.nextLine(); // 读取换行符
        }

        System.out.println("您输入的整数集合是：");
        for (int num : numbers) {
            System.out.print(num + " ");
        }
    }
}