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Java Tutorial
- What is Java?
- History of Java
- Hello Java Program
- Features of Java
- Basic Syntax
- Java Setup
- Data Types in Java
- Java Variables
- Operators in Java
- JVM
- Java If-else Statement
- Switch Case Statement
- Java Loops
- Do-While Loop
- Java While Loop
- Continue Statement
- Break Statement in Java
- Constructors in Java
- Oops Concept in Java
- Features of OOPs
- Inheritance
- Exeception handeling
- Aggregation (HAS-A relationship) in Java
- Method Overriding in Java
- Method Overloading
- Java Static Keyword
- Java This Keyword
- Java Final Keyword
- Polymorphism
- Static Binding and Dynamic Binding
- Abstract class in Java
- Access Modifiers in Java
- Difference between abstract class and interface
- Interface in Java
- Garbage Collection in Java
- Java Package
- Encapsulation
- Serialization and Deserialization in Java
- Java Inner Classes
- Java Applets
- Multithreading in Java
- Thread Priorities in Java
- Thread Creation
- Inter Thread Communication
- Wrapper Classes in Java
- Java Input Output
- Java AWT Introduction
- Java Layout Manager
- Java Layout Policy
- Java AWT Events
- Collection Framework
- Collection Framework List Interface
- Swing in Java
- Swing Utility Classes
- Swing Layout Managers
- Java JDBC
- Hibernate Framework Overview – Architecture and Basics
Springboot
- Spring Environment Setup
- Spring Boot CRUD REST API Project using IntelliJ IDEA | Postman | MySQL
- Dockerizing Spring Boot Application | Spring Boot Docker Tutorial
- spring-boot-restapidocumentation with swagger
- Spring Boot HttpClient Overview
- Apache HttpClient POST HTTP Request Example
- Apache HttpClient PUT HTTP Request Example
- Apache HttpClient DELETE HTTP Request Example
- Apache HttpClient HTML Form POST Request Example
- Spring Boot JSP Exampl
- Deploying Spring Boot WAR file with JSP to Tomcat
- Spring Boot Annotations
- Spring Core Annotations
- Spring MVC Annotations with Examples
- Spring Scheduling Annotations
- Spring - Java-based Container Configuration
- Spring Java Based Configuration Example
Hibernate
- Hibernate 5 hello world
- Hibernate- One to One Unidirectional Mapping Annotation Example
- Hibernate - Batch Processing
- Hibernate - Interceptors
- Hibernate 5 - Create, Read, Update and Delete (CRUD) Operations Example
- Hibernate Transaction Management
- Hibernate One to Many Unidirectional Mapping Example
- Hibernate One to Many Bidirectional Mapping Example
- Hibernate Many to Many Annotation Mapping Example
- Hibernate Primary KeyJoin Column
- Hibernate First Level Cache with Example
- Hibernate XML Configuration Example with Maven + Eclipse + MySQL Database
- Hibernate Java Configuration Example
- JPA 2 with Hibernate 5 Bootstrapping Example
- JPA and Hibernate Cascade Types
- Hibernate/JPA - Primary Key Generation
- Hibernate 5 - Enum Type Mapping Example
- Hibernate Component Mapping
- Hibernate Object States – Transient,Persistent and Detached
- Hibernate 5 - Save an Entity Example
- Hibernate 5 - Persist an Entity Example
- Hibernate 5 - saveOrUpdate() Method Example
- Hibernate 5 - get(), load() and byId() Method Examples
- Hibernate 5 - merge() Example
- Hibernate 5 - Delete or Remove an Entity Example
- Hibernate 5 - load() Method Example
- Hibernate Session Interface Methods
- Hibernate Session.clear() Method Example
- Introduction Of Java strutes to Architecture
- Struts 2 - Architecture
- Struts 2 - Configuration Files
- Struts 2 - Actions
- Struts 2 - Interceptors
- Struts 2 - Results & Result Types
- Struts 2 - Value Stack/OGNL
- Struts 2 - File Uploading
- Struts 2 - Database Access
- Struts 2 - Validations Framework
JAVA FX
- JavaFX Tutorial
- Introduction to JavaFX Pane
- JavaFX Popup
- JavaFX group
- JavaFX Controller
- JavaFX Gradient Color
- JavaFXAnchorPane
- JavaFXTabPane
- JavaFX Scene
- JavaFX Stage
- JavaFXWebView
- JavaFX Timeline
- JavaFX Timer
- JavaFX Image
- JavaFX Background
- JavaFX dialog
- JavaFX Font
- JavaFXTextArea
- JavaFXObservableList
- JavaFX GUI
- JavaFX FXML
- JavaFXEventHandler
- JavaFXGradle
- JavafxScrollpane
- JavaFXAPI
Basic Syntax
About Java programs, it is paramount to remember the accompanying points.
- Class Names –
For all class names, the first letter ought to be in Upper Case. On the off chance that few words are utilized to structure the name of the class, every internal word’s first letter ought to be in Upper Case. For example, a common class name is as follows:
class Sample class
- Case Sensitivity –
Java is case sensitive, which implies that the identifier Hi and hi would have distinctive importance in Java.
- Method Names –
All system names ought, to begin with, a Lower Case letter. If a few words are utilized to structure the name of the method, then every internal word’s first letter ought to be in Upper Case. An example of this convention is following:
public void mysamplemethod ()
- Filename –
The name of the system record ought to precisely match the class name. At the point when you are saving the file, you ought to keep it utilizing the class name. Remember Java is case touchy and affix “.java” to the end of the name. If the document name and the class name don’t match your system won’t assemble.
Consider the example of a class name Sample. In this case, you must name the file as
sample.java.
- public static void main(string args[])
Java system handling begins from the main() function, which is a required piece of each Java program.
Java Keywords
Keywords, or we can say reserved words in Java. As a rule, these words cannot be used as names for variables or constants.
List of Java keywords
- abstract
- break
- boolean
- case
- byte
- char
- catch
- const
- class
- default
- continue
- double
- do
- enum
- else
- final
- extends
- float
- finally
- goto
- for
- implements
- if
- instance of
- import
- int
- long
- interface
- new
- native
- private
- package
- protected
- return
- public
- static
- short
- super
- strictfp
- synchronized
- switch
- throw
- this
- transient
- throws
- while
- try
- volatile
- void
Comments in Java
Just as in the case of C++ and C, Java supports two types of comments, namely, single-line comments and multi-line comments. The syntax for these types of comments are as follows:
Single line comment:
//
Multiple line comment:
/**/
The Java compiler simply ignores all characters that exist in the comments region.
Using Blank Lines:
Any line that is only composed of whitespace characters or comments is considered a blank line. These lines are just ignored by the compiler and are not included in the executable.
Inheritance:
Java supports inheritance. In other words, it is possible to derive one class from another class in this programming language. For instance, if you need to create a new class, which is an extension of an existing class, then you can derive this new class from an existing class. This allows the new class to access the elements already implemented in the existing class. In this case, the new class is called the derived class, and the current class is referred to as the super class.
Interfaces:
As mentioned previously, Java is all about the interaction between objects. How different objects communicate with each other is defined in what is called an ‘interface.’ Moreover, interfaces are also an essential aspect of the inheritance feature of java. As part of an interface, the methods that can be used by a derived or sub-class are declared. However, all the methods declared as usable for the subclass must be implemented in the subclass.
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