Array Issues

[Sharoo]

Hi everyone,
I just have a quick question that probably has a really simple answer too. I've only just begun using arrays and I was wondering if it was possible to have an array that has 5 values initialised but also has room for it to be expanded, for example 15 extra positions giving a total of 20 with the initialised values.
Thanks :)

[Norm]

What happens when you code it and compile it?

[Sharoo]

That's my problem, I'm not sure how I would code it.
I know that if I was just to make an array without any initialised values I would write
private int sandwichesPurchased[] = new int[20]; for example
and if I was to initialise values I would do this
private int sandwichesPurchased[] = {1,2,3 . . .};
but I'm not sure how I would incorporate the both of them into one.

[Norm]

Ask the compiler if your code is valid.

[Sharoo]

I complied it with this as the array
private int sandwichesPurchased[] = new int[20];
and there are no errors.

[Norm]

If the compiler doesn't complain, then it should work.

[Sharoo]

But when I compile this array
private int sandwichesPurchased[] = new int[20];
there are no values initialised in the array, all we know is that there are 20 positions in it.
I was wondering if I could make an array that has initialised values as well as space if other values were needed to be input in later.

[Norm]

I was wondering if I could make an array that has initialised values as well as space if other values were needed to be input in later.

Did you ask the compiler?

[Sharoo]

How do I ask the compiler? Sorry for my lack of knowledge

[Norm]

Type in a line of code and compile it.

[Sharoo]

I am not sure what I would put into so I could compile it.

[2by4]

That's my problem, I'm not sure how I would code it.
I know that if I was just to make an array without any initialised values I would write
private int sandwichesPurchased[] = new int[20]; for example
and if I was to initialise values I would do this
private int sandwichesPurchased[] = {1,2,3 . . .};
but I'm not sure how I would incorporate the both of them into one.

What do you mean incorporate both into one?

Are you trying to create an empty array which isn't empty? o_O

Or are you looking for something that is CONDITIONALLY empty?

And what do you mean by empty, exactly? What does an empty element point to?

[Junky]

Lucky for you I'm on leave in a few days and I'm feeling benevolent. Here's an early Christmas present.

int[] arr = {1,2,3,4,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};