Complete List of Core Java Topics

Core Java

• History and Introduction of Java
• Java Features
• Comparison with C and C++
• JDK, JRE, JVM, JIT
• Installation
• Java
• Java Editor
• Eclipse IDE
• Environment variable setup
• JAVA_HOME
• classpath
• Basic Program - Hello Java!
• Command Line
• Java Editor
• Eclipse IDE
• Comments
• Single Line
• Multi Line
• Java Identifiers
• Java Keywords
• Java Naming Conventions
• Datatypes
• Primitive Data Types ( Range, Size & Default Value)
• Reference/Object Data Types
• Java Literals
• Commands
• javac
• java
• javap
• javapackager
• javaws
• jconsole
• jmap
• jhat
• jinfo
• javadoc
• Object, Class and Package
• Variable
• Local Variables
• Class Variables (Static Variables)
• Instance Variables (Non-Static Variables)
• Unicode System
• Escape Sequence Characters
• Fields
• Methods
• Casting
• Implicit/Explicit
• Up-casting/Down-casting
• Operators
• Assignment
• Relational
• Arithmetic
• Conditional
• Logical
• Bitwise
• instanceof
• Operator Precedence
• Operator Associativity
• Control Statements
• Selection/Decision-Making Statement
• if
• if-else
• if-elseif-else
• switch
• Loop/Iteration Statement
• for
• while
• do-while
• for-each
• Branching/Jump Statement
• break
• labelled break
• continue
• labelled continue
• return
• Command Line Arguments
• Array
• Var-Args
• Enum Data Type
• Modifiers
• Access Modifiers
• Non-Access Modifiers
• OOPS Concepts and their implementation in Java
• Association
• Aggregation
• Abstraction
• Encapsulation
• Polymorphism
• Compile time
• Runtime
• Inheritance
• Relationship
• IS-A
• HAS-A
• Cohesion
• Coupling
• Constructor
• Default Constructor
• Parameterized Constructor
• Constructor Overloading
• Constructor Chaining
• Wrapper Classes
• Auto-Boxing ( Boxing, Un-Boxing)
• Initializer Block
• Instance Initializer Block
• Static Initializer Block
• Order of Execution
• Inheritance
• Single Level
• Multilevel
• Hierarchical
• Multiple (not supported by Java)
• Hybrid ( not supported because this is one of the type of Multiple Inheritance) 
• Overloading and its rules
• Overriding and its rules
• Covariant Return Type
• Keywords
• this
• refer current class instance variable in constructor
• invoke current class constructor
• invoke current class method
• this keyword as an argument in method
• this keyword as an argument in object creation
• used to return current class instance
• abstract
• Abstract Classes
• Abstract Methods
• super
• super is used to refer immediate parent class instance variable.
• super() is used to invoke immediate parent class constructor.
• super is used to invoke immediate parent class method.
• final
• Final Variable
• Final Method
• Final Class
• static
• Static Variable
• Static Method
• Static Import
• volatile
• transient
• strictfp
• extends
• extends for class
• extends for interface
• implements
• import
• Interfaces
• Functional Interfaces (New in Java 8)
• Marker Interfaces
• interface v/s abstract class
• Concrete Class
• POJO Class
• Constructor concept for abstract class and interface
• String Handling
• String Pool
• String Class
• StringBuffer Class
• StringBuilder Class
• CharSequence
• StringTokenizer
• Assertion
• Thread & Concurrency
• Defining, Instantiating and Starting threads
• Thread States
• Thread Properties
• Thread Priorities
• Interrupting Threads
• Multi-Threading
• Using Thread Dump
• Locks
• Deadlock
• Inter-Thread Communication
• Worker Thread
• Daemon Thread
• join() method
• wait(), notify(), notifyAll() methods
• sleep() method
• Synchronization (block & Method)
• Concurrent API (java.util.concurrent)
• Blocking Queue
• Thread Pool
• Thread Safe collection
• Callables and Futures
• Fork/Join
• Executor
• Synchronizers
• Exception
• Exception Hierarchy
• Compile-time and Runtime Exception
• Checked and Unchecked 
• try, catch, finally, throw, throws
• try with resources (new in Java 7)
• multi-catch (new in Java 7)
• Exception overriding
• User Defined Exception
• JVM thrown exception
• Programmatically thrown exception
• Nested Classes
• Static Nested Class
• Inner Classes
• Regular Inner Class
• Method Local Inner Class
• Anonymous Inner Class
• Serialization and Deserialization
• Important Package
• java.lang
• java.util
• java.math
• Object class and its methods
• Regular Expressions
• Collection
• hashCode() and equals()
• Iterator and ListIterator
• Enumeration
• List
• ArrayList
• Vector
• LinkedList
• Stack
• Set
• HashSet
• LinkedHashSet
• TreeSet
• SortedSet
• NavigableSet
• EnumSet
• Map
• HashMap
• Hashtable
• TreeMap
• LinkedHashMap
• SortedMap
• NavigableMap
• Queue
• PriorityQueue
• Deque
• ArrayDeque
• Utility Classes
• Collections
• Arrays
• Ordered and Sorted Collections
• Comparator and Comparable interfaces
• Properties class
• fail-fast and fail-safe properties
• Diamond Syntax (new in Java 7)
• Backed Collection
• Thread Safe Collection
• CopyOnWriteArrayList
• ConcurrentHashMap
• CopyOnWriteArraySet
• Synchronized Wrappers
• Unmodifiable wrappers
• Collection Related Exception ( i.e. ConcurrentModificationException )
• Cloning
• Reflection
• Class Loaders
• I/O and NIO API
• RMI
• Generics
• Data Formatting
• Date and Calender classes
• Numbers and Currencies
• Parsing
• Tokenizing
• Formatting
• Internationalization and Localization
• Resource Bundles
• Annotations
• Memory Management
• Garbage Collection
• Heap Size
• Stack Size
• Java Start-up Args
• JDBC
• GUI - Swing, AWT, Applet
• Design Patterns
• Creational Design Pattern
• Factory Pattern
• Abstract Factory Pattern
• Singleton Pattern
• Prototype Pattern
• Builder Pattern
• Structural Design Pattern
• Adapter Pattern
• Bridge Pattern
• Composite Pattern
• Decorator Pattern
• Facade Pattern
• Flyweight Pattern
• Proxy Pattern
• Behavioral Design Pattern
• Chain Of Responsibility Pattern
• Command Pattern
• Interpreter Pattern
• Iterator Pattern
• Mediator Pattern
• Memento Pattern
• Observer Pattern
• State Pattern
• Strategy Pattern
• Template Pattern
• Visitor Pattern
• Lambda Expressions (new in Java 8)
• Different ways to create Java Objects
• New major features in each Java release
• Java 4
• Assertion
• Java 5
• for-each loop
• varargs
• static import
• Autoboxing and Unboxing
• Enums
• Covariant return type
• Annotation
• Generics
• Java 6
• JDBC 4.0
• Rhino (Java Script Engine)
• Console class
• Java 7
• Diamond Operator
• Using String in switch statement
• Automatic Resource Management
• Numeric literals with underscores
• Multi-catch feature
• New File API (NIO2.0)
• Working with path
• File change notification
• Fork and Join
• Supporting Dynamism
• invokedynamic
• java.lang.invoke
• Java 8
• Lambda Expressions
• Stream Collection Types (java.util.stream)
• Functional Interface (java.util.function)
• Nashorn - node.js on JVM
• Date/Time Changes (java.time)
• Type annotation
• Default Methods