Maurice Perry questions

Maurice Perry answers

• OOP-Design for validating user input
• ANTLR v4, JavaLexer and JavaParser returning null as parse tree
• Why does changing the type lead to different usage of members?
• Parsing SQL query in Java
• Deserialize into Map<String, String> with Jackson
• How to create recursive tree-like data structure in java using Map<String, T>?
• Java: Zipinputstream to Zipoutputstream leads to "end-of-central-directory signature not found" Error
• How to properly synchronize two threads
• Initialize variable by evaluating lambda directly
• What is the difference between <? extends Base> and <T extends Base>?