neko/src/test/java/com/neko/NekomimiApplicationTests.java

package com.neko;

import org.springframework.boot.test.context.SpringBootTest;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;

@SpringBootTest
class NekomimiApplicationTests {

    public static void main(String[] args) {
        String s = "1234,";
        List<String> l = Arrays.asList(s.split(","));
        for(String ss:l){
            System.out.println(ss);
        }
        System.out.println(l.size());
    }

}