What is an 'ambiguous type' error in Java?

Question

In the following code, I get an error from the compiler on the last line that says: \'the type List is Ambiguous\' (on the line that attempts to define cgxHist list). What

Answer 1

java.awt.List

java.util.List

Both of these exist. You'll have to add the namespace in front to use one:

java.util.List cgxHist = new ArrayList();

If you don't, it doesn't know how to interpret the List: is it the awt one or util? Ergo: ambiguous.