array containing int strings

[ggalan]

when i have an array containing only int's i use

int arr[] = {43,56,76,8,65,76,2,31};

what if my array contains a mixture of elements like strings and arrays, how would i do this?

[sarevok9]

An array can only contain the type of element in it's declaration. You can make an array of strings and convert your integer values into strings.

Example
int arr[] = {43, 21, 11, 0, 17, 3};
String[] strArray= new String [6];
for (int i=0; i< arr.length; i++){
strArray[i] = Integer.toString(arr[i]);
}

[ggalan]

thank you. btw is there a difference where the brackets are placed?

String strArray[]= new String [6];
String[] strArray= new String [6];

[sarevok9]

thank you. btw is there a difference where the brackets are placed?

String strArray[]= new String [6];
String[] strArray= new String [6];

There most certainly is. It needs to be placed after the type of array you're making, example:
int [] xxxx ={0};
or
char[] xxxxxx = {'0'};

Otherwise you're telling it that you're making an array of the variable name, which is something you won't be getting into for a while yet.

[Fubarable]

when i have an array containing only int's i use

int arr[] = {43,56,76,8,65,76,2,31};

what if my array contains a mixture of elements like strings and arrays, how would i do this?

You could create an array of Object and fill it with Strings and with Integers, the object wrapper for ints, but I strongly urge you not to do this as there's rarely a need to do this and it often makes for a very fragile program design. Better to create an class that will hold your different data types and then create an array or collection of objects of this class.

[sunde887]

Everything I have ever read says different.

int[] arr = new int[5];
int arr[] = new int[5];

Are the same, you can test it by creating both and filling them.

[Fubarable]

thank you. btw is there a difference where the brackets are placed?

String strArray[]= new String [6];
String[] strArray= new String [6];

These are two ways of declaring the very same thing. Please ignore sarevok's well meaning but misguided information.

edit: as sunde has already stated above. Once again I'm too slow!

[sarevok9]

These are two ways of declaring the very same thing. Please ignore sarevok's well meaning but misguided information.

Hrm, odd, I'm just going by the way it was outlined in the arrays chapter in my Java book. Apologies about that.

[Fubarable]

Hrm, odd, I'm just going by the way it was outlined in the arrays chapter in my Java book. Apologies about that.

Double check your book please as this is important to know.


Also the information can be found in the Oracle Java tutorials array page, about half way down: http://download.oracle.com/javase/tu...ts/arrays.html


You can also place the square brackets after the array's name:

float anArrayOfFloats[]; // this form is discouraged

[ggalan]

so they are the same?

[pbrockway2]

sunde887++

To my eye at least, "int[] arr" is more readable: it says straight up that we are dealing with a (1-d) array of int. It is the more common form and the one that Eclipse uses by default when you autogenerate a main() method. But there is absolutely no difference, "int arr[]" is semantically identical and the concept of "an array of the variable name" (whatever that means) is not expressable in Java.

------

As a weird hangover from C, or for some other reason, the square brackets can also go after a method name. As in

int foo()[] {
    return null;
}

Again, rather unreadable and even rarer "in the wild".

[edit] very slow ;(

[ggalan]

interesting.
ive been using actionscript and some javascript and used to

int arr[] = {};

declaring the variable type then stating the arrays values

but if this seems more java correct then i will adjust

int[] arr = {};

[sunde887]

Think of it this way, the bracket stands for array so which sounds better

 
Type array named name
int[] varName

Or 

Type named name that is an array
int varName[]

[ggalan]

makes sense, thanks!
:)

[sunde887]

You are welcome. If you are satisfied, please mark your thread solved withthe thread tools at the top.

[ggalan]

1 last question, when you have a multidimensional array would the same apply?

 int[][] arr = {{8,9,10,11},{12,13,14,15}};

or

 int arr[][] = {{8,9,10,11},{12,13,14,15}};

[Fubarable]

1 last question, when you have a multidimensional array would the same apply?

 int[][] arr = {{8,9,10,11},{12,13,14,15}};

or

 int arr[][] = {{8,9,10,11},{12,13,14,15}};

Not sure what you're asking so I'll try to answer two possible questions:

Would both versions compile and run the same? The best and quickest way to find out is to test it in a small program.

Are the same design and style issues present? Yes.

[ggalan]

in terms of where the brackets are placed, in multidimensional arrays does it look more "proper" when brackets be placed right after the variable type as in

int[][] arr = {{8,9,10,11},{12,13,14,15}};

as apposed to placing it after the variable name

[Fubarable]

in terms of where the brackets are placed, in multidimensional arrays does it look more "proper" when brackets be placed right after the variable type as in

int[][] arr = {{8,9,10,11},{12,13,14,15}};

as apposed to placing it after the variable name

Yes, the same design and style considerations apply for multi-dimensional arrays.

[sunde887]

Also, if you do work with multi dimensional arrays think of it this way. It's a 1 d array where each element is another array.