Java

Java is an object-oriented, class-based, concurrent, secured and general-purpose computer-programming language.
 

What is Java

Java OOPs Concepts

• Java Object Class
• Java Inheritance
• Java Polymorphism
• Java Abstraction
• Java Encapsulation

Java String

• Immutable String in Java
• Java String compare
• String Concatenation in Java
• Substring in Java
• Java String class methods
• Java StringBuffer class
• Java StringBuilder class
• Difference between String and StringBuffer
• Difference between StringBuffer and StringBuilder
• How to create Immutable class?
• Java toString() method
• StringTokenizer in Java

Exception Handling

• Java try-catch block
• Java catch multiple exceptions
• Java Nested try block
• Java finally block
• Java throw exception
• Java Exception propagation
• Java throws keyword
• Difference between throw and throws in Java
• Difference between final, finally and finalize
• ExceptionHandling with MethodOverriding in Java
• Java Custom Exception

Java Inner Classes

• Java Member inner class
• Java Anonymous inner class
• Java Local inner class
• Java static nested class
• Java Nested Interface

Java Multithreading

• Multithreading in Java
• Life cycle of a Thread (Thread States)
• How to create thread
• Thread Scheduler in Java
• Sleep method in java
• Can we start a thread twice
• What if we call run() method directly instead start() method?
• The join() method
• Naming Thread and Current Thread
• Priority of a Thread (Thread Priority)
• Daemon Thread in Java
• Java Thread Pool
• ThreadGroup in Java
• Java Shutdown Hook
• How to perform single task by multiple threads?
• Java Garbage Collection
• Java Runtime class

Java Synchronization

• Synchronization in Java
• Synchronized block in java
• Static synchronization
• Deadlock in java
• Inter-thread communication in Java
• Interrupting a Thread
• Reentrant Monitor in Java

Java I/O
Java Serialization

• Serialization and Deserialization in Java
• Java Transient Keyword

Java Reflection

• Java Reflection API
• newInstance() method
• Understanding javap tool
• Creating a program that works as javap tool
• How to call private method from another class in java

Java Date and Time
Java Conversion
Collections in Java

• Java ArrayList class
• Java LinkedList class
• Difference between ArrayList and LinkedList
• Java List Interface
• Java HashSet class
• Java LinkedHashSet class
• Java TreeSet class
• Java Queue Interface
• Java Deque Interface
• Java Map Interface
• Java HashMap class
• Java LinkedHashMap class
• Java TreeMap class
• Java Hashtable class
• Difference between HashMap and Hashtable
• Java EnumSet class
• Java EnumMap class
• Java Collections class
• Sorting in Collection
• Java Comparable interface
• Java Comparator interface
• Difference between Comparable and Comparator
• Properties class in Java