java - StringIndexOutOfBounds by -3 -

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i have inherited project should work. however, original coder unavailable.

i'm getting stringindexoutofboundsexception.

the stack trace goes line: 

int lserver_num = integer.parseint(motd.substring(motd.indexof("-") + 1, motd.indexof(" ")));

suggestions?

you trying substring value greater string's length or less 0. if provide more code, easier diagnose problem exactly. haven't, have assume.

here example:

string test = "123-2 "; int = integer.parseint(test.substring(test.indexof("-") + 1, test.indexof(" "))); system.out.println(i);

when run it, prints out 2, no problem. if remove space string, gives me arrayindexoutofboundsexception: -5 dont know how arrives @ -5, can see string 5 characters long without space, guess defaults strings length if cant find character, maybe?

from this, have ask: sure string contains blank space or hyphen ?

check with

if (motd.contains(" ") && motd.contains("-")

also null check see if motd null first.


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