packages annotations multithreading generic-programming stream-api java-swing stringbuffer exception-handling string-in-java java-awt random-access-file collection-in-java file-handing-in-java interface-impliments-in-java stream-class wild-card-in-java super-extends-class autoboxing-unboxing input-output-stream-in-java eventhandling-eventlistener

jdbc inheritance generics abstraction oop-principles polymorphism encapsulation uml-diagrams exception-handling layered-architecture nested-class type-casting abstract-classes dynamic-arrays wrapper-class autoboxing-unboxing input-output-stream-in-java