Search:

when they press enter it should return them to the main menu to press a number again. The main menu method is app.displayMenus();

I don't know how to write it though because the else if statement before it confuses me on what to put in the while loops boolean expression
else if(option == 3)
{
while(?)
{
...

I am having trouble with returning to the main menu.

public static void main(String[] args)
{
Project4 app = new Project4();

//Display all Menu options
app.displayMenus();
//Asks...