The code that examines all the strings in the input source and determines how long the longest string (or strings are) is the following:
total = 0;
% initial value is zero, in every while loop it will be incremented
while(input.hasNextInt()){
total += input.nextInt( );
}
Answer:
EventHandler
Explanation:
In order to do this the programmer needs to use the EventHandler class. This class allows the computer to listen for certain user actions such as pressing a button. Using this on a button would then allow the programmer to specify what they want to happen when the user clicks the button or performs a certain action. For example, in this scenario, the programmer would program an EventHandler so that when the button is clicked it saves the input to a variable and changes the input field to the next option.