题解 | #参数解析#

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

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            String a = in.nextLine();
            process(a);
        }
    }

    private static void process(String str) {
        List<String> list = new ArrayList<>();
        for (int i = 0; i < str.length(); i++) {
            while (i< str.length() && str.charAt(i) == ' ') {
                i++;
                continue;
            }

            if (str.charAt(i) == '"') {
                int s = ++i;
                while (i< str.length() && str.charAt(i) != '"') {
                    i++;
                }
                String child = str.substring(s, i);
                list.add(child);
            } else {
                int s = i;
                while (i< str.length() && str.charAt(i) != ' ') {
                    i++;
                }
                String child = str.substring(s, i);
                list.add(child);
            }
        }

        System.out.println(list.size());
        for(String s : list) {
            System.out.println(s);
        }
    }
}