Reshma Bidikar

Java Blog

Core Java

• Java 17 Features
• Java 11 Features
• How to add days to a Date in Java
• How to read a file on the Classpath in Java
• Java Inheritance Interview Questions
• Difference between local, instance and static variables in Java
• Difference between Comparator and Comparable
• Difference between Module and Package
• What is the difference between iterator and splititerator
• Java Queue Interface Explained
• How to create a new file on the file system
• How to remove whitespaces from a String
• Constructors in inheritance
• How to check if a Date is before or after another Date
• How to add a number of days to a Date
• Iterator v/s Enumeration
• Java Method Overloading Explained
• How to sort a list in descending order
• Java varargs explained
• Java Try With Explained
• Java Callable Explained
• How to find the number of years between two Dates
• How to find the day of the week represented by a date
• Java final Keyword
• Java protected Keyword
• Java Treeset v/s Hashset
• Java super Keyword Explained
• Java Arrays Explained
• Java if-else
• How to count the number of vowels and consonants in a String
• How to find the number of digits in a String
• How to obtain a list of files in a folder
• How to sort a List of Objects using a Comparator
• How to find the largest number in an array
• Compile-time Polymorphism v/s Runtime Polymorphism
• Why is Java Platform-independent
• How to check if a number id even or odd
• How to convert a Java List to an Array
• How to reverse a set or List
• Java Autoboxing Explained
• Java Nested Classes Explained
• ArrayList v/s LinkedList
• How to calculate the sum of numbers in an array
• How to check if an input character is a vowel
• How to create a List without using list.add
• How to find if two lists are exactly the same
• How to Reverse a Sentence via Java
• How to Sort a List via Java
• NullPointerException Explained
• How to check if a file exists at the specified path
• How to check if a number is a prime number
• How to check if a String has digits in Java
• How to check if a String is a substring of another String
• How to convert a String to lowercase
• How to create a directory in Java
• How to create a new file in Java
• How to delete a file in Java
• How to delete a folder in Java
• How to find the count of each character in a String
• How to find the free space in a drive in Java
• How to find the total space in a drive in Java
• How to make a file read only in Java
• How to read a CSV file in Java
• How to remove a character from a String in Java
• How to rename a file in Java
• How to replace a String with another String
• How to split a String via Java
• Checked vs Unchecked Exceptions
• How are Java Strings Immutable
• How to convert a String to uppercase
• Java Constructors Explained
• Java Enumerations Explained
• Java Interfaces Explained
• String vs StringBuffer vs StringBuilder

Java 11 New Features

• Java 11 String Enhancements

Java 10

Java 10 time based release and versioning Java 10 Unmodifiable Collections Java 10 Type Inference

Java 9

• Java 9 New Features
• Java 9 Modules Introduction
• Creating a Module
• Java 9 Module Internals
• Java 9 ofnullable Stream Improvements
• Java 9 Stream API Iterate Method Example
• Java 9 Stream Dropwhile With Examples
• Java 9 Stream takeWhile With Examples
• Java 9 Private Interface Methods
• JShell in Java 9
• Collection Factory Methods in Java 9

Java 8 New Features

• Overview of new features in Java 8
• Java 8 Optional
• IntBinaryOperator
• Java 8 Parallel Streams
• putIfAbsent and getOrDefault Methods explained
• DoubleUnaryOperator in Java 8
• Java 8 Comparator Changes
• IntFunction in Java 8
• ToIntFunction in Java 8
• Java 8 DoubleToLongFunction Example
• Java 8 DoubleToIntFunction Example
• Java 8 DoubleBinaryOperator Example
• Java 8 LocalDateTime Class
• Java 8 LongSupplier Example
• Java 8 Stream API Distinct Example
• Java 8 Binary Operator Example
• Java 8 Map Compute Method Examples
• Java 8 DoubleFunction Example
• Java 8 SplitIterator
• Java 8 Collection Removeif Method
• Java 8 Iterator foreachremaning Method
• Java 8 DoubleSupplier Example
• Java 8 LocalTime Class Explained
• Java 8 Stream API allMatch Example
• Java 8 IntConsumer Interface
• Java 8 LongConsumer Example
• Java 8 Stream API Map Operation Example
• Java 8 LocalDate Explained
• Java 8 DoubleConsumer Example
• Stream API filter example
• Java 8 BiFunction Example
• Java 8 UnaryOperator Example
• Java 8 Stream API
• Java 8 Method Reference Operator Example
• Java 8 Stream API anyMatch Example
• Java 8 Lambda Expressions Explained
• Java 8 BiPredicate Example
• Java 8 For-each
• Java 8 Functional Interface Example
• Java 8 Biconsumer Interface Example
• Java 8 Consumer Interface Example
• Java 9 Default Methods in Interface Explained
• Java 8 Functional Interface
• Java 8 Static Interface Methods
• Java 8 IntSupplier Interface Example
• Java 8 LongPredicate Interface Example

Spring and Spring Boot

• Spring Boot Maven Plugin Explained
• How to create a JAR file from a Spring Boot Application using Maven
• How to use logging in Spring Boot
• How to use Flyway with SpringBoot
• How to create a SpringBoot Thymeleaf application
• How to create a SpringBoot REST Service with XML output
• How to create a Hello World SpringBoot Application
• SpringBoot Annotations Explained
• Spring Bean Scopes
• How Spring Works
• SpringBoot Starter Dependencies
• Spring Annotation Configuration Example
• Spring Initializr Explained
• Spring Java Configuration Example
• Spring XML Configuration Example
• Spring Framework What and Why
• Spring Modules Explained
• Spring Exception Handling
• Spring REST Client Using RestTemplate
• Spring ExceptionHandler annotation explained
• Spring RequestMapping,GetMapping, PostMapping Annotations
• Important Spring MVC Annotations
• How to Create a Spring REST Application
• Controller vs RestController in Spring
• How to create a HelloWorld Spring MVC Application
• How to create a SpringBoot REST Service and test it via Postman
• SpringBoot JPA Example
• SpringBoot What and Why

Jax-rs and REST

• What is REST API
• JSON Syntax and Benefits
• Jax-rs Exception Handling
• Jax-rs v/s Spring Rest
• Important Jax-rs annotations explained
• How to create a REST Service in Java using JAX-RS
• How to create a JAX-RS Jersey Client

Maven, Tomcat and Eclipse

• How to setup Tomcat in Eclipse
• Maven Clean Install Command Explained
• How to create a Maven Wen Project using Archetype Selection
• Maven Wrapper
• Tomcat Maven Plugin
• How to Deploy an Application in Tomcat in Eclipse
• How to create a Maven web project in Eclipse
• How to add Maven Dependencies via Eclipse

Docker

• Docker Introduction

Git and Github

• Git Branch and Fork Explained
• Git Commands CheatSheet
• How to Create a Remote Repository in Github
• Some Git Terminologies
• Git and Github Differences Explained
• How to Create a Local Repository in Git

JPA, Hibernate and JDBC

• JPA Interfaces Explained
• How to create a Standalone JPA Application
• Introduction to JPA
• Hibernate List Mapping
• Hibernate Collection Mapping
• JPA Hibernate Inheritance Mapping Strategies
• Hibernate HQL Syntax
• Automatic Dirty Checking in Hibernate
• How Hibernate SessionFactory Works
• Hibernate Association Mappings
• Hibernate Interfaces Explained
• Hibernate Caching Explained
• Hibernate Persistence Life Cycle
• Hibernate Save v/s saveorUpdate
• How to query a table via JDBC
• JPA vs Hibernate
• Statement vs PreparedStatement
• What is Hibernate Criteria API
• Difference Between save and persist in Hibernate
• JDBC vs Hibernate
• Update vs Merge in Hibiernate
• Difference between Get and Load in Hibernate

Unit Testing

• TestNG Annotation
• How to use TestNG with Maven and Eclipse

Swagger

• Introduction to Swagger

Python

• How to setup Pydev with Eclipse
• How to create a Python Program in Eclipse
• Python While Loop
• Python Function Arguments Explained
• Python Functions Part 1
• Reading User Input in Python
• Python Directory
• Python Tuples
• Python Lists and List Operations
• Python String Operations
• Python numeric and String Variables

Javascript

• Javascript Under the Hood