Indeed, if a Java Map implementation allows for null values, ... I list the entire code listing for the MapContainsGet class here for completeness: MapContainsGet.java.

If this is an application requirement, the three best ways to solve the ‘multiple values per key in a map in Java’ problem are: Stick with the standard APIs and add a collection class like a ‘Vector’ ...

Nested classes are classes that are declared as members of other classes or scopes. Nesting classes is one way to better organize your code. For example, say you have a non-nested class (also ...