Add method of an array

does anyone know how to write an add method of an array?

You can not add methods to an array like you can with a class.

Please explain what you are trying to do.

box class

item array
int numItem


i want to write a add method in the main argument which would add an item in the box and increase the numItem

box.add(item1);
box.add(item2);

etc

how do i make it so the item1 would be at location 0 in the array item2 would be at location 1

how do i initialize the item array in the box class?

Your question leaves many things undefined and unanswerable.
What class is the box variable? Does it have an add() method? Where does the add method put the value that is passed to it?
Where are the variables: item1 and item2 defined?

You should initialize the variable: array before you put it into the box. If array has a null value that is what the box's add() method will receive.

solved

Have you got your answer and solved your problem?

solved

Describe what the method should do in small simple steps.
What does it need to do with the argument that is passed to it?

the method should ad the item into the box array and increase the numItem

box array size is the actual numItem

so if no item is add the box array is size 0
item1 is added the box array size is 1
and so on so forth

That looks like a start.
Also you need to define the array and give it some slots so you can add to it.
Your constructor sets the array to null instead of defining it with some size.
Why not define an array with some empty slots so you will be able to put items into it in the add method?

solved

This replaces the existing array with a new array. The contents of the old array is lost.

You can not change the size of an array. You must create a large enough one in the constructor. The add method should add items to the existing array.

If the array is full when add is called, then add must create a new larger array, copy the contents of the existing array to it and replace the existing array with the new array.

You must post the code that you are compiling. The code you have posted so far does not make sense. The variable names and the class names are changing from post to post.

problems solved