The size of an array

I have created an integer array, i want to store the size of the array in a variable (for an insertion sort). But i get an error when i do the following code.

Code:

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int[] myArray;
int lastPos = myArray.length();

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The error is "cannot perform length() on an integer array" (or something similar to that, i'm not at my computer now so i cant see the error).

What is the problem?

The array hasn't been initialised.
int[] a = new int[3];

Quote:

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Originally Posted by DeadEyes

The array hasn't been initialised.
int[] a = new int[3];

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How can i initialise an array that i dont know the size of, also can i change the size at a later time? I dont want to use an ArrayList (these are dynamic, size isn't a problem with these).

You can add to the array any time you want.
But you can't assign the length to a variable until it has a value

Quote:

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Originally Posted by ComputerJy

You can add to the array any time you want.
But you can't assign the length to a variable until it has a value

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So if for example i assign 10 spaces for the array when i initialise it, can i then add more spaces once there is data in the array without losing the data?

Quote:

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Originally Posted by x-ice

So if for example i assign 10 spaces for the array when i initialise it, can i then add more spaces once there is data in the array without losing the data?

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Normally for a dynamically sized list, you would use one of the many Collection classes, like ArrayList for instance.

Quote:

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Originally Posted by x-ice

So if for example i assign 10 spaces for the array when i initialise it, can i then add more spaces once there is data in the array without losing the data?

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You can use arrays concatenation any time, without losing data