" is null 异常-6ren"> " is null 异常- 这个问题在这里已经有了答案: What is a NullPointerException, and how do I fix it? (12 个答案) 关闭去年。 我正在开发 JDA Discor-6ren">
个人中心
gpt4 book ai didi

java.lang.NullPointerException : Cannot read the array length because "" is null 异常

转载 作者：行者123 更新时间：2023-12-05 04:54:28 30 4
gpt4 key购买 nike

<分区>

我正在开发 JDA Discord Bot，每次运行它时，我都会收到此异常。

java.lang.NullPointerException: Cannot read the array length because "<local3>" is null
    at com.houseofkraft.handler.CommandHandler.scanIndex(CommandHandler.java:42)
    at com.houseofkraft.core.DiscordBot.<init>(DiscordBot.java:68)
    at com.houseofkraft.Stratos.main(Stratos.java:13)

我试图制作一个基本的命令处理程序，这里是它的代码:

 public void scanIndex(Index index) throws IOException, InvalidLevelException {
        String[] commandList = index.indexClass;

        for (String classPath : commandList) {
            if (classPath.startsWith("com.houseofkraft")) {

                String[] classPathSplit = classPath.split("\\.");
                String commandName = classPathSplit[classPathSplit.length-1].toLowerCase();

                commandPaths.put(commandName, classPath);
                DiscordBot.logger.log("Added " + commandName + " / " + classPath + " to path.", Logger.DEBUG);
            }
        }
    }

索引.java:

package com.houseofkraft.command;

public class Index {
    public String[] indexClass;

    public String[] getIndexClass() {
        return indexClass;
    }

    public Index() {
        String[] indexClass = {
                "com.houseofkraft.command.Ping",
                "com.houseofkraft.command.Test"
        };
    }
}

我不确定为什么会导致异常。谢谢!

编辑:这是我的 DiscordBot 代码

    public DiscordBot() throws IOException, ParseException, LoginException, InvalidLevelException {
        try {
            if ((boolean) config.get("writeLogToFile")) {
                logger = new Logger(config.get("logFilePath").toString());
            } else {
                logger = new Logger();
            }

            logger.debug = debug;

            info("Stratos V1");
            info("Copyright (c) 2021 houseofkraft");

            info("Indexing commands...");
            // Add the Commands from the Index
            commandHandler.scanIndex(new Index()); // here is the part that I call
            info("Done.");

            info("Connecting to Discord Instance...");
            jda = JDABuilder.createDefault(config.get("token").toString()).addEventListeners(new EventHandler(commandHandler)).build();

            if (jda != null) {
                info("Connection Successful!");
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

30 4 0
文章推荐： typescript - Record 和 [key : string]: type 之间的区别
文章推荐： heroku - 将信用卡添加到 Heroku
文章推荐： Docker 从 Artifactory 中拉出
文章推荐： image - Keras Graph 断开连接无法获取张量 KerasTensor 的值
行者123
个人简介

我是一名优秀的程序员,十分优秀！

滴滴打车优惠券免费领取
滴滴打车优惠券
全站热门文章
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com