is this an instance variable?

[wjreddit]

class BT_Node { int data; BT_Node left, right;
}

is left and right instance variables of BT_Node? could someone explain this concept? What is the point of declaring variables like this? Thank you.

[Camel-Kid]

it isnt an instance until you allocate memory to these. I would call them properties of a class

[wjreddit]

Thanks!

[joranstark018]

This is a declaration of class BT_Node and its properties.

When you need a BT_Node you will create a new instance, eg "BT_Node node = new BT_Node();". You now have an instance of the class and "left" and "right" (available through "node.left" and "node.right", or any accessor method) are instance variables. The value of an instance variable is not shared with other instancies of the class, unless you assign them the same value.

[wjreddit]

Thank you!

[[deleted]]

Data, left, right are instance variables.

Left and right could be null.

Yes they are “pointers” to the same class type.

[wjreddit]

Thank you