java.lang.Array IndexOutOfBound sException

[oll3i]

i get
Exception in thread "main" java.lang.Array IndexOutOfBound sException: 2
at Producent.main( producent.java: 605)

when i run it from bat

@start "Supply Chain Management-Producer to Queue" run Producent queue1 queue2 queue3 queue4

maybe you will se something i dont see

public static void main(String[] args){
 
 
 
        if (args.length < 1 || args.length > 4) {
            System.out.println("usage: <destination> <destination> <destination> <destination>");
            System.exit(1);
        }else {Producent producent=new Producent(args[0],args[1],args[2],args[3]);}
         /// producent.close();
 
      }     
}
 

thank you

[oll3i]

yes it's Producent producent=new Producent(args[0],args[1],args[2],args[3]); causing the exception on line 607
weird
it works fine with 2 parameters
but i need four for the queues

[oll3i]

i bat i have 4 parameters
i checked it to be sure

[JosAH]

yes it's Producent producent=new Producent(args[0],args[1],args[2],args[3]); causing the exception on line 607 it worked fine with 2 parameters

Well, there you have your solution: you should pass four argument to your main()
method if your constructor expects four arguments; simple as that.

kind regards,

Jos

[blazedaces]

Well, there you have your solution: you should pass four argument to your main()
method if your constructor expects four arguments; simple as that.

kind regards,

Jos

He should still have error/exception handling if someone/him inputs less then 4 or maybe more arguments though right? ;)

-blazed

[oll3i]

it must be something wrong in bat file cos when i run it
>java Producent q1 q2 q3 q4 it works and app opens

[JosAH]

He should still have error/exception handling if someone/him inputs less then 4 or maybe more arguments though right? ;)

-blazed

Yep; if the constructor for that class demands four arguments the user better
supply them all four, no more and no less and the code should elegantly bail
out if any other number of arguments is supplied. That entire little problem is
so old; an args.length != 4 test is all that's needed in this example.

kind regards,

Jos

[r035198x]

it must be something wrong in bat file cos when i run it
>java Producent q1 q2 q3 q4 it works and app opens

You just run the bat file without supplying the arguments?

[oll3i]

no in bat i 'm passing four arguments that's why i dont know why it happens

[JosAH]

no in bat i 'm passing four arguments that's why i dont know why it happens

Use the "poor man's debugger": do this at the start of your main method:

System.out.println("nof args: "+args.length);
for (int i= 0; i < args.length; i++)
   System.out.println(i+": "+args[i];
 

and see what arguments are really passed to your main method. Always give
the bug less and less space to hide; finally you can pinpoint it and remove it.
Just guessing never helped anyone.

kind regards,

Jos

[blazedaces]

Use the "poor man's debugger": do this at the start of your main method:

System.out.println("nof args: "+args.length);
for (int i= 0; i < args.length; i++)
   System.out.println(i+": "+args[i];
 

and see what arguments are really passed to your main method. Always give
the bug less and less space to hide; finally you can pinpoint it and remove it.
Just guessing never helped anyone.

kind regards,

Jos

What's the "rich man's debugger" ?!

This is how I usually debug things...

-blazed