Stuart Marks questions

Stuart Marks answers

• Combine values with Java8 stream
• How can I sum the values associated with a reoccurring key in a hashmap
• Why doesn't Java 21's EnumSet implement the new SequencedSet interface?
• How to use a lambda expression to pass a method as a parameter when calling another method?
• Old versus new foreach loop
• Java8: Why a lambda expression could do a logical and(or) with boolean
• Distinguish empty Stream, Stream of empty Optionals only, Stream with at least one non-empty Optional [duplicate]
• Replace a part of string in big array with replace method and Java 8
• Convert an entrySet to an array
• Usage of multiple inheritance in Java 8