遍历一个输入值，为啥我的数组越界了

Question

代码如下：
package com.StringLearn;

import java.util.Scanner;

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

    System.out.println("input your number:");
    String line= sc.nextLine();

    //定义三个变量，初始值都是0
    int number=0;
    int Bigcharacter=0;
    int Smallcharacter=0;

    //获取每一个字符串
    for (int i=0;i<=line.length();i++){
        char ch=line.charAt(i);

        //做判断
        if (ch>='A' && ch<='Z'){
            Bigcharacter++;
        }else if(ch>='a' && ch<='z'){
            Smallcharacter++;
        }else if(ch >='0' &&ch<='9') {
            number++;
        }
    }
    System.out.println("大写："+Bigcharacter);
    System.out.println("小写："+Smallcharacter);
    System.out.println("数字："+number);
}

}

Answer 1

应该是i<line.length()啊，因为下标从0开始，所以最后一个字符的坐标是长度-1