Using Java8 -
To Build: Compile the three classes Coin.java, CoinCombination.java, and CombinationMain.java
To Run: Main method is in CombinationMain.java and it expects one parameter, the currencies to use. If no argument is given, it will default to "Quarter,4,Dime,10,Nickel,20,Penny,100".
example: java CombinationMain Coin,1.5,Arrowhead,3,Button,150
Alternatively: You can open the project structure in Eclipse or similar IDE and run CombinationMain from there