不能从命令行运行我的程序 [英] Cant run my programme from command line

问题描述

我有一个main方法创建一个逻辑类的实例

I have a main method that creates an instance of a logic class

 public static void main(String[] args) {
        try {
            Logic logic = new Logic(args[0]);
            ....... do some stuff here

        } catch (Exception e) {
            System.out.println("Error Encountered Details: " + e);
        }
    }

事情是程序需要一个csv文件运行，我已经把它在与.jar文件相同的目录，但是当我从命令行运行我只是得到java.lang.arrayindexoutofbounds（0）错误

the thing is that the programme requires a csv file to run, i have put it in the same directory as the .jar file but when i run from the command line i just get java.lang.arrayindexoutofbounds(0) error

我做错了什么

感谢

推荐答案

看起来像：

java -cp {name_of_jar} {name_of_class} {name_of_csv}

您似乎没有提供.csv文件名（它将在 args [0] ）？

It looks like you're not supplying the .csv file name (which will go in args[0]) ?

上述假设主类未在.jar清单中定义。如果是，则使用：

The above assumes that the main class is not defined in your .jar manifest. if it is, then use:

java -jar {name_of_jar} {name_of_csv}

这是一个很好的做法，检查 args [] 数组btw并生成诸如缺少.csv文件名或类似内容的消息，以避免令人讨厌的异常/堆栈跟踪。

It's a good practise to check the args[] array for the required info, btw, and generate a message such as "Missing .csv file name" or similar to avoid a nasty exception/stack trace.

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