在理解起始索引和子字符串如何工作方面几乎不需要帮助[重复]

这是我的密码

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

    System.out.print("Type a word: ");
    String userWord = reader.nextLine();

    System.out.print("Length of the first part: ");
    int userLength = Integer.parseInt(reader.nextLine());

    System.out.println("Result: " + userWord.substring(0, userLength));
}

结果:

Type a word: hellothere
Length of the first part: 3
Result: hel

开始索引从0开始计数,对吗?那么结果不应该打印“地狱”吗?

1=e

2=l