如何解决 java 中 hashmap 字符串拆分的数组索引越界异常？

Question

I am trying to put a text file into a hashmap with a while loop, and use string split to get the key value pairs. However, I keep getting Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 1 out of bounds for length 1.

package com.company;

import java.io.File;
import java.util.HashMap;
import java.util.Scanner;

public class Extract {
    public static void main(String[] args) throws Exception {
        Extract e = new Extract();
        HashMap<String, String> x = e.hashFile("locations.txt");
        x.get("name");

    }

    public HashMap<String, String> hashFile(String filename) throws Exception {
        HashMap<String, String> data = new HashMap<String, String>();

        Scanner in = new Scanner(new File(filename));
        String line;
        while (in.hasNext()) {
            line = in.nextLine();


            String[] keyvalue = line.split(":");
            keyvalue[1] = keyvalue[1].trim();


            data.put(keyvalue[0], keyvalue[1]); // this is where the exception is thrown from

        }


        in.close();
        return data;


    }


}

My text file locations.txt looks like:

name: Starting Point Park
exits: 1
exitDirection: E
description: You were just given your first cell phone as a birthday-present and you are at the park taking selfies. You choose your best-looking photo and upload it to your brand-new Instagram account. Suddenly, a white rabbit runs up and steals your phone and heads down a hole just big enough for you to fit in to. Instantly you panic and worry about the lost phone, not because it was a gift, but because you need to see how many likes your photo got.

Answer 1

Why not try the following to see what is going on? Catch the exception and print the string and the array.

        String[] keyvalue = null;
        try {
           keyvalue = line.split(":");
           keyvalue[1] = keyvalue[1].trim();

           data.put(keyvalue[0], keyvalue[1]); // this is where the exception is thrown from
        } catch (ArrayIndexOutOfBoundsException e) {
            System.out.println("line = " + line);
            System.out.println(Arrays.toString(keyvalue));
        }