Arrays of Objects

Hello,

Why doesn't this flag a compilation error?

Thanks in advance for your help.

Because an array of anything is in itself an Object.

neither would this

It's because an object array is an object.

If I am reading the code correctly, you have an array of objects, o[], containing a single element. That element is an Object array of arrays.

I hate being only seconds late !! ;-)

I usually find Rob Prime is a few seconds ahead of me

Must be that delay for the information to cross the pond

.

Actually, come to think of it, I don't know if Rob lives across the pond or not....or, for that matter, if JR is hosted across the pond.......

I believe JR is located in the US of A, so both Campbell and me live across the great pond.

Thank You

I live near a tiny pond.

Hi, All.......

It's said that in K&B's book,

When you assign an array to a previously declared array reference, the array you're assigning must be the same dimension as the reference you're assigning it to. ...

int[] blots; int [][] squeegees = new int[3][]; blotts = squeegees; // NOT OK, squeegees is a two-d array of int arrays.

Then these line are wrong? .........

The bit about two-d is wrong. There is no such thing as a 2-D array in Java. Look at the Java™ Tutorials, where it says it's an array of arrays.
A reference must be declared and assigned the same type. An int[] is different from an int[][], but both count as objects. And an int isn't an object. You can assign squeegees[0] to blots (or vice versa) because they are both the same type, viz int[]. Both are however null in the code you quoted.

have a look here!

Abimaran Kugathasan wrote:have a look here!

Thank you. It is useful to quote such links.

Campbell Ritchie wrote:

Abimaran Kugathasan wrote:have a look here!

Thank you. It is useful to quote such links.

You are welcome!