Java

Stream

Lambda expression-2

Lambda expression-1

Runnable

Inner class

Map Interface

Comparable & Comparator(Interface)

Set Interface

Iterator

ArrayList & LinkedList

Stack & Queue

List Interface

collection framework

Generic

Dynamic loading

Class

Wrapper

String

Object-2

Object-1

JDBC

Interface

Abstract class

Down casting & instanceof

Polymorphism

Inheritance

ArrayList

System

object oriented programming

Java basic

Java environment