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.
The incidence of heart disease in those who drink moderate amounts of alcohol (no more than two drinks per day for men or one drink per day for women) is lower than in nondrinkers. However, with increased intake of alcohol, there are increased health dangers including high blood pressure, obesity, stroke.