Error Message on Java Compiler

lad12

Exception in thread "main" java.lang.NullPointerException
at Directory.main(Directory.java:26)

Anyone know what the problem is....

Hobbes

The problem is in line 26 of Directory.java

beyond that you don't have enough information to supply a proper answer.

henbane

http://java.sun.com/j2se/1.4.2/docs/api/java/lang/NullPointerException.html probly doesn't help and awful lot but is as good a place as any to start.

Twould be a good idea to post a little code when you want answers to this kind of thing. Or possibly just go to java.sun.com first

lad12

On line 26 i use an array to read in information...

Array.get();

and in the method get i read in 2 strings and an int from the keyboard...can you read in 3 parts of information into 1 component of the array...

seamus

Doesn't seem to make a whole pile of sense.
Post up your whole code, so we have proper context.

henbane

Originally posted by lad12
Array.get();

Looks like i might be reaching a value larger than the size of the array.

and in the method get i read in 2 strings and an int from the keyboard...can you read in 3 parts of information into 1 component of the array...

If you have created a class with the relevant attributes and the array is of that type, it shouldn't be a problem.

Silent Bob

Originally posted by lad12
Exception in thread "main" java.lang.NullPointerException
at Directory.main(Directory.java:26)

Anyone know what the problem is....

It means you've tried to reference something that quite simply does not exist. The usual culprit is iterating over the end of an array, or trying to call a method on a reference which has been set to null.

MrPinK

I'm guessing you created an array of objects, but didn't initialise them. It's a little different than creating an array of primative types.

int[] Array = new int[10];
// that works fine alright

myObject[] Array = new myObject[];
// not done yet. You've only created the refs to the objects....
for(int i = 0; i < 10; i++)
   Array[i] = new myObject();
// now you have an created all the objects

This wouldn't happen to be a Joe Morris assignment, would it?