将字符串扫描到 ArrayList

Question

我想扫描一些字符串（不带 ,）并打印出来（带 ,）。我可以知道我应该如何更改我的代码吗？

Example: Test input: Apple Pen Water

Correct output: [Apple, Pen, Water]

Current code output: [Apple Pen Water]

import java.util.*;

class Main {
    public static void main(String[] args) {
        ArrayList<String> yourList = new ArrayList<>();
        Scanner sc = new Scanner(System.in);

        while(sc.hasNext()){
            yourList.add(sc.nextLine());
        }
        System.out.println(yourList);
        
    } 
 }

Answer 1

您将整行输入为单个字符串而不是单独的字符串：

while(sc.hasNext()){
    yourList.add(sc.next()); // next() instead of nextLine
}

Answer 2

如果要打印以逗号分隔的列表中的单词，请使用 String.join:

System.out.println(String.join(",", yourList));

将字符串扫描到 ArrayList

Scan string into an ArrayList

java

java.util.scanner