java - 我可以在不使用循环的情况下从Java中的单行输入读取多个整数吗

Question

我在寻找一段代码来将一堆整数读入列表时遇到问题，我尝试了这个但没有成功:

public static void main(String[] args){
    int[] a = in.readInts(); //in cannot be resolved
    StdOut.println(count(a)); //StdOut cannot be resolved
}

你能帮我吗？

Answer 1

尝试此示例代码，看看它是否适合您。

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

public class Main {
    public static void main(String[] args) {
        int amount = 3; // Amount of integers to be read, change it at will.
        Scanner reader = new Scanner(System.in);
        System.out.println("Please input your numbers: ");

        int num; // integer will be stored in this variable.
        // List that will store all the integers.
        ArrayList<Integer> List = new ArrayList<Integer>();
        for (int i = 0; i < amount; ++i) {
            num = reader.nextInt();
            List.add(num);
        }
        System.out.println(List);
    }
}

控制台中输入 1 2 3 的代码产生:

Please input your numbers:
1 2 3 
[1, 2, 3]