Beer Alcohol Content List

How I can do java prog requesting a list of liquorsfrom two below, and print the alcohol content of a drink.
The question I am trying to solve is the following. A waiter likes naughty trick your customers as many drunks pouring drinks containing two different liquors, in equal amounts in glass. Write a java program that calls for two spirits from the list below, then print the alcohol content of a drink. Suppose that: German beer is 4% alcohol is 7% alcohol wine is 12% alcohol bourbon whiskey is 40% alcohol rum is 60% alcohol is 77% alcohol water is 0% alcohol The bartender she is not exactly sober, so to allow the possibility that two liquids are the same. How I would appreciate having this problem solved.
u know the alcohol content of PC in the liquid. so avg. this is the output.
Diet Beer? Yep we have that!