unknown -size initialization of an array

[bela]

hello,

may I know the method to create an array with unknown size?
in C , one can go for malloc.
what is the method in java?

regards,
bela

[Nepomuk]

hello,

may I know the method to create an array with default size?
size is unknown to me initially.

regards,
bela

I don't think, there is a default size for arrays in Java initially, but you can always do something like this:

int defaultSize = 10;
int size;
// try to get the size from somewhere, if no size is given, set size = defaultSize
int[] array = new int[size];
 

Greetings,
Nepomuk

[bela]

I don't think, there is a default size for arrays in Java initially, but you can always do something like this:

int defaultSize = 10;
int size;
// try to get the size from somewhere, if no size is given, set size = defaultSize
int[] array = new int[size];
 

Greetings,
Nepomuk

thank you.
I'm sorry, I want to say array of unknown size.
in C, using malloc, we can assign memoey,
how can we do this in java?
regards

[Nepomuk]

thank you.
I'm sorry, I want to say array of unknown size.
in C, using malloc, we can assign memoey,
how can we do this in java?
regards

I'm not familiar with C, but as far as I know, C (and C++) are much less strict when it comes to arrays than Java. If you want a Collection, which you can change the size of, use a Vector. It will automatically adjust it's size to what you enter into it. Otherwise, it's not much different to an array.

Greetings,
Nepomuk

[r035198x]

thank you.
I'm sorry, I want to say array of unknown size.
in C, using malloc, we can assign memoey,
how can we do this in java?
regards

Use arraylist instead. Array length is fixed in java and should be specified when the array is initialized.

[bela]

I'm not familiar with C, but as far as I know, C (and C++) are much less strict when it comes to arrays than Java. If you want a Collection, which you can change the size of, use a Vector. It will automatically adjust it's size to what you enter into it. Otherwise, it's not much different to an array.

Greetings,
Nepomuk

Thank you.
Its working.

regards,
bela

[bela]

Use arraylist instead. Array length is fixed in java and should be specified when the array is initialized.

yes, it also working.
thank you.
regards,
bela

[r035198x]

I hope you googled for ArrayList vs Vector.

[Nepomuk]

I hope you googled for ArrayList vs Vector.

I have now... learned something again! :-)

Greetings,
Nepomuk

[bela]

I hope you googled for ArrayList vs Vector.

Yes, me too.

regards,
bela