java - 数组的简单 for 循环问题

Question

这是我现在的代码

for (int i = 0; i <= listOfPeople.length; i++){
    String name = scnr.nextLine();
    System.out.println("Person " + (i + 1) +  ": ");
    listOfPeople[i] = name;
}

人员列表是一个正确声明的字符串列表，其长度为用户发送的值。发生的错误是当我运行程序时，我得到这个:

Person 1: 

Jordan

Person 2: 

Jordan

Person 3:

Jordan

Person 4: 

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 3
    at RGG.main(RGG.java:20)

我不太确定哪里出了问题，但我尝试删除 for 循环声明中的 =，然后得到以下输出:

Person 1: 

Jordan

Person 2: 

Jordan

Person 3: 

第三个提示后，代码继续，我不能在那里输入任何内容。有谁知道会发生什么？提前致谢!

Answer 1

删除 =在这个表达式中 i <= listOfPeople.length; .它导致您访问不存在的数组元素。

for (int i = 0; i < listOfPeople.length; i++){
        String name = scnr.nextLine();
        System.out.println("Person " + (i) +  ": ");
        listOfPeople[i] = name;
}

完整示例:

public class PersonArrayTest {

    public static void main(String[] args) {
        String[] listOfPeople = new String[5];
        assign(listOfPeople);
        System.out.println(Arrays.toString(listOfPeople));
    }

    public static void assign(String[] listOfPeople) {

        Scanner scnr = new Scanner(System.in);
        for (int i = 0; i < listOfPeople.length; i++) {
            String name = scnr.nextLine();
            System.out.println("Person " + (i) + ": ");
            listOfPeople[i] = name;
        }
    }
}