ansaurus

Question

2d String Array NullPointerException (java)

Answer 1

+10 A:

String[][] addressData - this is just declaration, you have to create actual object String[][] addressData = new String[size][size];

Btw, There is no 2d arrays in java String[][] is an array of arrays of strings

Luno 2009-11-23 21:29:09

Thanks for the reply, when I set a size to the 2d array it will work yet I don't want a limit on the size of the 2d array. It could range for just a few piece of data to thousands so I don't want a limit or null values. Is there any way around this?

Student01 2009-11-23 21:36:46

If you don't want to fix the size, make it an array of Lists instead of a 2D-array.

ammoQ 2009-11-23 21:39:28

@Student01: The only way around it is not using arrays. You can use a list of lists of strings.

sepp2k 2009-11-23 21:40:17

As I wrote, it's not 2d array but array of arrays. You have to give a size when creating an array, so you have to do:String[][] array = new String[Size][]; - it'll create an array of String[] type with length = size filled with nulls, but you can put arrays with different length into it, for example:array[0] = new String[10];array[1] = new String[50];etc

Luno 2009-11-23 21:41:16

ammoQ - you Can't make array of lists ( at least when using generics ). It's imposible to make an array of generic types

Luno 2009-11-23 21:41:49

ok thanks for the help, I am going to try implementing a lit of string instead. Cheers

Student01 2009-11-23 21:52:58

Answer 2

A:

How to set data and get data? from a string 2d array what methods are there?

Rida Mayram 2010-04-23 16:41:00

ansaurus

tags:

views:

answers:

2d String Array NullPointerException (java)

related questions