Kannan Thangadurai questions

• 'gradlew eclipse' command is not working
• How lambda expression works with Predicate?
• Not able to register webhook via postman in twitter app
• Null value in method parameter [duplicate]
• 'jshell' is not recognized as an internal or external command
• Why does `System.out.println(null);` give "The method println(char[]) is ambiguous for the type PrintStream error"?

Kannan Thangadurai answers