Andreas questions

Andreas answers

• Java 8 rewriting a complex for loop using streams
• Put in the map if key exists and value is not null, else throw exception
• Select method based on field in class
• Printing the length of shortest way in maze
• Create object using of vs new
• Use Spring properties loading without initializing the Spring context
• How to implement method reference as a predicate?
• What is the difference between IntStream and Stream<Integer>? [duplicate]
• SQL Error : integrity constraint violation : foreign key no parent
• Unable to Reflectively Instantiate a "protected" class of an "opened" package, from another module