The dequeue method will also use method incrementIndex to add one to frontIndex (with wrap-around) before returning the value that was at the front of the queue. The other queue methods (empty and size) are the same as those methods for the Stack class -- they just use the value of the numItems field.
In other words, drinking alcohol is not entirely positive. Excessive drinking can cause increased risk of stroke, arrhythmia (irregular heartbeat), and heart muscle disease. Excessive calories that you can get from alcohol can raise your triglyceride (another kind of bad cholesterol). And the increased triglyceride can be potential to affect your LDL to rise.
Moderation depends on your gender. Men can enjoy two drinks per day, while women should limit themselves to one. Alcohol can increase low levels of HDL, or good, cholesterol. This cholesterol type clears excess LDL, or bad, cholesterol, from your blood, reducing your risk of heart attack and stroke.