getting compile error for diamond operator in idea ide
You need to set the project language level (default for all modules) and the module(s) language level
diamond-operator
What is the diamond operator in Java? [duplicate]
Don’t worry. It’s not an evil. It’s feature of Java 7. The purpose of the diamond operator is to simplify instantiation of generic classes. For example, instead of List<Map<Integer,Set<String>>> p = new ArrayList<Map<Integer,Set<String>>>(); with the diamond operator we can write only List<Map<Integer,Set<String>>> p = new ArrayList<>(); If you want to know more about it and … Read more
What is the point of the diamond operator () in Java?
The issue with List<String> list = new LinkedList(); is that on the left hand side, you are using the generic type List<String> where on the right side you are using the raw type LinkedList. Raw types in Java effectively only exist for compatibility with pre-generics code and should never be used in new code unless … Read more