Nikolai Shevchenko questions

Nikolai Shevchenko answers

• Alternative to ApplicationContext.getBean() in Spring
• "JSON parse error: Cannot construct instance of (although at least one Creator exists): cannot deserialize from Object value - SpringBoot
• Get value from Map of Map of Map without null pointer exception
• Why does List.addAll of a reversed subList of the list cause a ConcurrentModificationException [duplicate]
• What is the best way of defining key for @Cacheable annotation for Spring
• Build predicates for a postgres jsonb column with criteria builder using JPA criteria
• How to use MapStruct for different data types?
• Add WHERE IN clause to JPA Specification
• Advantage of lateinit over null initialization in java?
• Java 8 Map Reduce on HashMap as lambda