sfiss questions

sfiss answers

• Why is lambda return type not checked at compile time?
• Parsing Date in UpperCase to LocalDate
• Generate an infinite Stream<Integer> containing the integers (0, 1, -1, 2, -2, 3, -3, ...)
• Collectors.toMap write a merge function on a different attribute of object than the one which is not used as value
• Generating equals/hashCode implementation but without a call to superclass, even though this class does not extend java.lang.Object
• How to configure Jackson to convert all fields of a type to another type?
• How can I find out which method a lambda applies to? [duplicate]