Adding Element To ArrayList Not Working

Ive set up a list to when a user creates an element it will be added to the entire list, but when i return to the main menu the Element isnt added.

Here is the code

public void setElement(int atomicNum, Element e){
if (ElementHasData(atomicNum) == false) {
if(atomicNum < MAX){
list[atomicNum] = e;
atomicNum++;

[Code] ...

Here is what the code intiates

~MAIN MENU~
Please select an option you wish to activate
1) Print All Elements
2) Print One Specific Element
3) Add an Element
4) Edit an Element

3
What is the atomic number of the Element you would like to add
Numbers only valid 1-113
1
Enter element name
Hydrogen
Enter element Symbol
H
What is the Elements weight
1.01
NEW ELEMENT ADDED!

[Code] ....

~MAIN MENU~

Please select an option you wish to activate
1) Print All Elements
2) Print One Specific Element
3) Add an Element
4) Edit an Element

But then after i try to print the specific element

~MAIN MENU~
Please select an option you wish to activate
1) Print All Elements
2) Print One Specific Element
3) Add an Element
4) Edit an Element
2
What is the atomic number of the Element
1
that element does not exist would u like to create this element Enter yes or no