How do you create a priority queue for integers? By default, how are elements ordered in a priority queue? Is the element with the least value assigned the highest priority in a priority queue?

How do you modify the code in the MutilpleBallApp program to remove the first ball in the list when the button is clicked?

Implement the moveDisks method in Listing 18.8 using a stack instead of using recursion.

Can the EvaluateExpression program evaluate the following expressions "1+2", "1 + 2", "(1) + 2", "((1)) + 2", and "(1 + 2)"?

How do you create an instance of Stack ? How do you add a new element to a stack? How do you remove an element from a stack? How do you find the size of a stack?

How do you create a list from an array of objects?