Full Stack Java Developer Course | Session - 2 | Programming Concepts | rajonlinetrainings

Summary

In this full stack Java course, the instructor outlines the curriculum covering Java SE for desktop apps, web technologies like HTML, CSS, JavaScript, and frameworks such as Hibernate and Spring. The course also includes advanced topics like microservices and real-time tools like Maven, GitHub, and Postman. The session emphasizes the importance of understanding programming concepts like variables, data types, and methods before diving into Java. The instructor introduces the class structure, timing, and the recording process, setting the stage for a comprehensive learning experience.

Takeaways

• 😀 The course covers full stack Java development, including Java SE for standalone applications, web technologies like HTML, CSS, JavaScript, and advanced topics like Java EE with servlets and JSP.
• 👨‍💻 The course introduces two significant frameworks: Hibernate for database interaction and Spring for comprehensive web application development, including Spring Core, Spring Data, Spring MVC, and Spring Boot.
• 🌐 The curriculum also includes learning about web services and microservices using Spring Boot, which are crucial for building scalable and maintainable applications.
• 🛠️ Real-time tools such as Maven for dependency management, GitHub for version control, and Postman for API testing are part of the course to equip students with industry-standard tools.
• ⏰ The course is structured with a duration of approximately 55 hours, conducted from Monday to Friday at 7 PM IST, with each class lasting up to one hour.
• 🔗 Students are provided with a consistent meeting link to join the classes throughout the week, and recordings are shared for future reference.
• 💡 The importance of understanding programming concepts before delving into specific languages like Java is emphasized to ensure a smooth learning curve.
• 📝 Comments are introduced as a way to document code, making it understandable and maintainable for other programmers or for future reference.
• 🔑 Keywords in programming languages are highlighted as reserved words that have special meanings to the compiler or interpreter.
• 📚 Variables are explained as named memory spaces used to store data, with data types defining the kind of data a variable can hold, such as integers, floats, or strings.
• 📋 The process of declaring variables is outlined, which involves specifying the data type and variable name, essential for allocating memory and defining how data is stored and manipulated.
• 📚 Methods or functions are introduced as sub-programs designed to perform specific tasks, with a focus on how to define, call, and return values from methods, including the concept of return types.

Q & A

What is the main purpose of the course 'Full Stack Java'?

The main purpose of the 'Full Stack Java' course is to cover various aspects of Java programming, including Java SE for standalone applications, web technologies for UI design, Java EE for web applications, and learning important frameworks like Hibernate and Spring.

What does Java SE stand for and what type of applications is it used for?

Java SE stands for Java Standard Edition. It is used for developing standalone or desktop applications such as a calculator, notepad, or paint programs.

Can you list some of the web technologies covered in the 'Full Stack Java' course?

Some of the web technologies covered in the course include HTML, CSS, JavaScript, XML, JSON, TypeScript, and Angular.

What is Java EE and how does it differ from Java SE?

Java EE stands for Java Enterprise Edition. It is used for developing web applications, unlike Java SE which is for standalone or desktop applications. The course discusses servlets and JSP as part of Java EE.

What are the two important frameworks that will be learned in the 'Full Stack Java' course?

The two important frameworks that will be learned are Hibernate and Spring.

What is the significance of the Spring framework in the course?

The Spring framework is significant as it is used for developing web applications and understanding web services concepts. It includes modules like Spring Core, Spring Data, Spring MVC, and Spring Boot.

What real-time tools will be covered in the course to aid in development?

The course will cover real-time tools such as Maven, GitHub, and Postman to aid in the development process.

What is the duration of the 'Full Stack Java' course?

The duration of the course is approximately 55 sessions.

What is the schedule for the 'Full Stack Java' classes?

The classes are held from Monday to Friday at 7 pm IST.

What is the importance of understanding programming concepts before diving into a programming language like Java?

Understanding programming concepts is crucial as it provides a foundational knowledge that makes it easier to learn any programming language, including Java.

What is a program in the context of programming?

A program is a collection of statements used to perform a specific task, such as calculating the area of a rectangle or finding the net salary of an employee.

Why are comments important in programming?

Comments are important in programming because they help document the code, making it understandable to other programmers or even to oneself in the future.

Outlines

00:00

📚 Course Overview and Java Full Stack

The script introduces a full stack Java course, emphasizing the curriculum's comprehensive nature. It begins with Java SE for standalone applications like calculators and notepads, then moves into web technologies including HTML, CSS, JavaScript, XML, JSON, TypeScript, and Angular. Advanced Java EE is covered for web applications, with a focus on servlets and JSP. Frameworks like Hibernate and Spring are also discussed, with Spring's sub-modules such as Core, Data, MVC, and Boot being highlighted. The course also touches on real-time tools like Maven, GitHub, and Postman. The class schedule is detailed, with sessions from Monday to Friday at 7 pm IST, and recordings are promised to be shared post-class.

05:02

💡 Understanding Programming Concepts

This section aims to lay a foundation in programming concepts before delving into specific languages like Java. The importance of understanding programming fundamentals is stressed, as it eases the learning process of any new language. The script defines a program as a collection of statements designed to perform specific tasks, such as calculating areas or handling data operations. It introduces the concept of comments in code, which are essential for documentation and clarity, and differentiates between single-line and multi-line comments. Keywords, which are reserved words understood by the programming language, are also explained, with examples provided.

10:05

🔑 Key Programming Constructs: Variables and Data Types

The paragraph delves into the concept of variables as memory space identifiers used to store data. It explains how variables are named and their role in holding data like employee numbers or names. Data types are introduced as classifications for the kind of data a variable can store, such as integers, strings, or floats. The importance of declaring variables with their data types before use is emphasized, ensuring the correct allocation of memory space. The paragraph also touches on the syntax for declaring variables in programming languages, illustrating with examples and reinforcing the need for a semicolon at the end of each statement.

15:07

🛠 Methods and Functions in Programming

This section explains methods and functions as sub-programs designed to perform specific tasks. It uses the example of calculating the area of a rectangle to illustrate how methods are defined and called. The paragraph clarifies the role of arguments and parameters in methods, and how they are used to pass data required for the task. The concept of the return type is introduced, explaining how it dictates the data type of the result that a method returns. The difference between a method that returns a value and one that does not (void) is also discussed, highlighting the importance of understanding method return types before beginning Java programming.

20:07

🔍 Deep Dive into Methodology and Function Types

The final paragraph focuses on the intricacies of methods, emphasizing the return type and how it defines what a method outputs. It uses the area calculation method as an example to explain the process of defining, calling, and returning values from methods. The paragraph also clarifies the use of the 'void' keyword when a method does not return any value. The instructor reassures that these concepts will be revisited with examples and assignments, encouraging students to grasp the basics before moving on to Java. The session ends with an invitation for questions and a预告 of the next class, which will begin with an introduction to Java.

Keywords

💡Java SE

Java SE, or Standard Edition, is the core Java platform that provides the foundation for developing and deploying Java applications. In the video, Java SE is mentioned as the starting point for learning Java, emphasizing its role in developing standalone or desktop applications. Examples given include a calculator, notepad, and paint programs, which are typical uses of Java SE in creating desktop software.

💡Web Technologies

Web Technologies refer to the various tools and languages used to create websites and web applications. The script discusses HTML, CSS, JavaScript, XML, JSON, TypeScript, and Angular as part of web technologies. These technologies are crucial for front-end development, which is the visual and interactive aspect of web applications, and they form the basis for the UI design portion of the course.

💡Java EE

Java EE, or Enterprise Edition, is an extension of the Java SE platform that provides a comprehensive set of services for developing large-scale, multi-tiered, scalable, reliable, and secure server-side applications. In the context of the video, Java EE is mentioned as being used for developing web applications, with servlets and JSP (JavaServer Pages) being key components discussed.

💡Frameworks

Frameworks in the video refer to pre-written code libraries that provide a structure for developing applications. Two important frameworks mentioned are Hibernate and Spring. These frameworks are used to simplify and standardize the development process, making it easier to build robust and maintainable applications. The Spring framework, in particular, is highlighted for its use in web services and its various modules like Spring Core, Spring Data, and Spring MVC.

💡Real-Time Tools

Real-Time Tools are software utilities that aid in the development process by providing real-time feedback or automation. The video mentions Maven, GitHub, and Postman as examples. These tools are used for dependency management (Maven), version control and collaboration (GitHub), and API testing (Postman), respectively, and are integral to modern software development practices.

💡Programming Concepts

Programming Concepts are the fundamental ideas and principles that underlie all programming languages. The video emphasizes the importance of understanding these concepts before delving into specific languages like Java. Basic concepts such as comments, variables, data types, and methods are discussed as essential building blocks for any programmer, regardless of the language they choose to work with.

💡Comments

Comments in programming are annotations or notes that are included in the source code but are ignored by the compiler or interpreter. They are used to explain the code, making it easier to understand for other programmers or for future reference. The video explains two types of comments: single-line comments (denoted by //) and multi-line comments (enclosed within /* and */), which are used to document the program and aid in readability.

💡Keywords

Keywords in programming are reserved words that have special meanings to the programming language and cannot be used as identifiers. The video provides examples of keywords such as 'int', 'float', 'if', 'else', 'while', and 'class'. These words are essential as they define the syntax and structure of the language, and understanding them is crucial for writing valid and syntactically correct code.

💡Variables

Variables in programming are used to store data values. The video explains that variables are named memory spaces where data can be held for later use. Variables are crucial for manipulating data within a program, and they are defined with a specific data type. Examples given in the script include 'employee number', 'student name', and 'salary', illustrating how variables are used to hold different types of data.

💡Data Types

Data Types define the kind of data a variable can hold. The video distinguishes between several data types, such as 'int' for integer values, 'float' for decimal numbers, and 'string' for text. Understanding data types is important because it dictates what operations can be performed on the data stored in a variable and how much memory will be allocated for it.

💡Methods

Methods, also known as functions, are blocks of code designed to perform a specific task. The video explains how to define a method with a name, a pair of parentheses for parameters, and a body enclosed in curly braces. Methods can take input, process it, and optionally return a value, which is demonstrated with the example of a method to calculate the area of a rectangle. Methods are fundamental to modular programming, allowing for code reuse and organization.

Highlights

Introduction to Full Stack Java course content, including Java SE for standalone applications, web technologies like HTML, CSS, JavaScript, and enterprise Java with servlets and JSP.

Emphasis on learning important frameworks like Hibernate and Spring, which are crucial for web application development.

Explanation of the Spring framework's modules, including Spring Core, Data, MVC, and Boot, which are essential for understanding web services and microservices.

Introduction to real-time tools like Maven, GitHub, and Postman, which are vital for modern software development.

Course duration and schedule details, with classes from Monday to Friday at 7 PM IST, lasting up to one hour.

The importance of understanding programming concepts before delving into specific languages like Java.

Definition of a program as a collection of statements designed to perform specific tasks.

Explanation of comments in programming, their types, and their role in documenting code for better understanding and maintenance.

Introduction to keywords in programming languages, which are reserved words understood by the language.

Discussion on variables as memory spaces with names to store data, and their importance in programming.

Explanation of data types, which determine the type of data a variable can hold, such as integer, float, and string.

How to declare variables in programming, including the syntax and rules involved.

The concept of methods or functions in programming, which are sub-programs used to perform specific tasks.

Detailed walkthrough of defining a method, including its name, parameters, and the process of calling the method.

Understanding the return type of a method, which dictates the data type of the value returned by the method.

The difference between a method with a return type and a method with a void type, indicating whether a method returns a value or not.

Reiteration of the importance of grasping basic programming concepts before proceeding to Java technology.

Transcripts

this conference will now be recorded

so in the last class we have just seen

the demo part of our course

full stack Java

so just have given the contents what we

are going to discuss let me recap those

contents here like initially we go with

code Java even we call it as Java SC

stands for standard edition

the mean use of going with code Java is

used to develop

and alone

or desktop applications

to developer Standalone or a descriptive

applications

some of the examples of a discrete of

applications are like a calculator

notepad paint Microsoft but all this

comes under desktop applications

okay the next one is we go with the web

Technologies

even we call it as UI design or front

end design

here we go with the contents like HTML

PSS

JavaScript

XML

Json

typescript

and angular

the next one Advanced Java

even we call it as Java e stands for

Enterprise Edition

where it is used to develop

web applications it's for web

applications and the contents what we

discuss over here is servlets and JSP

ASP stands for Java server pages

and extend very very important category

that is Frameworks

and here we are going to learn two

important Frameworks one is hibernate

framework

and one more spring framework

in framework

if

before we go to Spring framework when we

discuss web services as we use this web

services Concept in Spring framework and

in this spring framework we'll be making

use of the we'll be learning the models

like spring core or bin module

bring davo module

where we discuss three sub models like

spring jdbc

okay

in data module

next one we go with the spring MVC

module

which is mainly used to develop web

applications

to develop web applications then even we

discuss one more very very important one

spring board module

it will be going finally

with

rest module

using springboard

next one will be even going with micro

services

using springboard

the next category is Real Time tools

so where we will be learning some of the

real-time tools like

maven

GitHub

Postman like this

okay the duration of our codes the

duration of our course goes with God

approximately 55 x maximum 55 x and the

time of our class is Monday to Friday

at 7 pm ist

I Friday at 7 pm I stay in the class

will go for maximum one hour

okay and what are the go to meeting link

you are having you can use the same link

to join for this complete week

right

now

the class is getting recorded that

recordings will be shared to you after

the class it's a regular process

yeah any questions anyone up to your

right

so today let us move to the today's

topic

before we enter into any programming

languages like C or C plus plus or

java.net or python whatever it may be

every programmer should have a basic

idea on programming Concepts

so if you are having some basic idea and

programming Concepts entering into any

programming language will be easy for us

so the objective today is will be

understanding the programming Concepts

so that from the next class we can enter

into Java technology very easily

so today it is understand the

programming Concepts

uh

before we enter into this what we are

going to write is program so let us

understand what we say program

how to define a program is like a

program

is a collection of statements

collection of statements used to do

a specific task

is it to do what a specific task we

write some statements mainly use it to

perform some tasks

the examples of task like

finding area of a rectangle

finding total marks of his student

finding net salary of an employee adding

a book to the library

depositing amount in the bank

adding an item into the cart

booking a movie ticket like this this

all things are called as task to do that

we have to write some statements that

set of statements only with Yes program

so when you are writing the program we

make use of some of the concepts like

the first one let us understand about

comments

let us understand about comments

so

what is this comment is like whenever we

are writing a program

your program should be understood by

other people also other programmers are

also will check our program and they

will be elaborating our programmer they

may add some more code to our program

right

now so what are the programs we write in

order to make our program to be

understoodable understandable by other

programmers or even our self in feature

we have to document that that

documentation we do by using comments so

you can say comment or use it

comments are used to document a program

to document a program and ignored by

kept programming language

by the programming language okay wearing

two types of comments

telling two types of comments

they are

single line comment

and multi-line comment

multiply comment so when we go for

single line we use the symbol slash

slash or multi-lane we use the symbol

slash tuck and end with again star slash

Tech example

you can say slash slash to find area of

a rectangle

one more example for multi-line class

star to find

cross salary

and net salary

of an employee

this is what multi-line comment for

single end value slash slash slash star

and end with second star slashes

multiplayer this is mainly for what to

document your program you are

elaborating more what you are doing

inside the program and this is ignored

by the language

the next one is keyword

when you take any programming language

like C C plus plus java.net python there

will be some words which are understood

by the language automatically

those words only we call it as keywords

those words only we say keywords so you

can see a keyword

is a result word

or predefined but

whose meaning

is known to the

language directly

language will understand these words

automatically

some of the examples of keywords are

like in

float

if

else

care

while

to

per

class

public

await like this these are some more some

of the examples of events where many

programming language supports

that the next one is a variable

the next one is what variables

the meaning of variable is like

the meaning of variable is

whenever you want to store some data

like example if I want to store

I want to store like employee number we

required some memory space if I want to

store some employee number may require

some memory space if you want to store

something like salary we require some

memory space if you want to store

something like name may require some

memory space to store the data the names

what you are giving to the memory spaces

to store the data these names only we

call them as what variables

these names only be called variable

so how to define a variable is like a

variable is an

identifier

which allocates

which allocates some memory space

allocation memory space

so like examples you can say employee

number

student name

a salary

item price like this these are some of

the examples of variable names

the next 10 one more very very important

one here is data type

so the meaning of data type is like once

we allocate memory space for variable

like example h

so when we say h what type of data we

store in h like example 20 so a numeric

value without a decimal point we call it

as integer

equal integer if we take like name

so in name we generally store a value of

some collection of characters collection

of alphabets

then we call it as what string we call

string

next one for example if you want to

store something like height

if you want to store something like

height so in height we generally store

something like 5.9 so a numeric value

with a decimal point and we call it test

float

we call it as what float type so the

meaning of data type is like once we

allocate memory space for variable what

type of dot you want to store in the

allocated variable that only we call

data type

so you can define a data type like

type of data

a variable holds

variable holes is called as

data type

the profit and available holes is called

a spot data type

some of the examples of data type like

in

there

float string like this string means

collection of characters

collection of characters only makes a

string

so whatever I am discussing everything

will be redised once again once we enter

into the Java Basics so we'll be

learning the Java syntaxes there

the next important one is

Declaration of variable

Declaration of variable

so whenever we want to store some data

into the variable

we need to allocate memory for it

so in order to allocate memory space for

variable we need to declare it so what

is the meaning of Declaration is in

order to

allocate

memory space

path variable

we need to

declare the variable

you need to declare the variables the

syntax of declaring variable is the

meaning of syntax is like rules of the

language

on the top here programming language

like grammaticals so that syntax of

declaring variable is we have to provide

the data type then variables like

variable one comma available to comma

like that variable n

most of the programming languages like C

C plus plus java.net every statement we

end with semicolon

like example

in say int a comma B so A and B are

variables of type integer means in A and

B we can store only integer values

character C

float f

string name like this

in order to allocate memory space for

variables we have to declare the

variable without declaring the variable

we cannot use that variables in our

program

right

clear everyone any questions obtained

clear

right

no

let us move to the next one this is the

next and very very important event that

is Method or function

for the meanings method or function in

Java we call it test method in CC plus

plus we call it as function that's only

the difference

so how to define is a method is a sub

program

a Methodist but it is a sub program

which is used

to do a specific task

a part of program is only amended

like example

like example

we want to find area of a rectangle so

in order to find area of a rectangle we

are going to define a method like area

rate

we are going to define a method like

area Vector so if you are having some

basic idea on Excel also you might have

used some functions in Excel like some

average count those functions those only

we call methods are function okay

that now the task is what year we want

to find what area of a rectangle then

I'm going to define a method area right

and here we have to end with parenthesis

so when we see some word after that when

we see parenthesis that means it is a

then we go with open and close curly

braces

this is the way how method looks name of

the method then parenthesis then open

and close curly press

that in order to find area of a

rectangle what data do we require

in order to find the area of a rectangle

what data do we require what's the

formula for area of rectangle

length

yeah lengthen bits and what's the

formula length interpret will give area

so what is the data required to perform

area rate task length and breadth so

that input what we require to perform

this task that we have to pass in

between this parenthesis like this

intellin comma int directly

right

so this length and breadth are variables

even we call them as arguments and we

have to provide the data type before the

variable

okay then only it is going to allocate

memory space for your variable so this

length and breadth

and convert are arguments

or even be called parameters

now now in order to find area of a

rectangle I am taking a variable area

and the formula is part length into

breadth

since we are using the variable area so

to allocate memory for area we have to

declare it so declare before using the

variable

now so what is the value of area it's

going to multiply length and breadth now

so this code whatever you are rating we

call it as defining the method

defining the method means we are writing

the code inside the method now let us

call the method

calling the method

whenever you want to call method we have

to do like this area right and we have

to pass the values 10 comma 5.

now what is going to happen this 10 will

come and store into length variable if I

will commence store into relative

variable

then what will be the value of area now

what's the value of area now

t

50 right the value of 80 is 50. this

result whatever we got this result

whatever we want we got this result we

want to give it back to this method you

want to give it back here how to give it

back is

by using the keyword written and we have

to pass the name of the variable written

area so this 50 the result will come and

store into this method now and you can

even store it into some other variable

and print here

if you print a what value it's going to

print 50 for us so this is called as

defining the method means writing the

code inside the method this you are

calling the method when you call the

method we pass the values then what are

the result we get that result if I want

to give it back to the method we are to

use what keyword written and give that

value back that I am storing into a and

when I print it we get 50.

no

this area whatever you are returning

what is the data type of this area

what is the data type of area variable

and

integer right what is the data type of

area variable integer so before the

method name we have to mention the data

type what you are returning

this whatever you are mentioning the

data type before method name this we

call it as a written type this word is

important for me

this is the main reason why I'm

discussing this concept here the meaning

of method written type

so what are the value are going to

written the value whatever you are

giving outside of your method

so what are the value or returning we

have to mention the data type of that

variable before the method name this

only be called written type

so what is the written type

the written type of

area estimated

area direct method is integer

if we take the same method

if you take the same method

but you are not I don't want to return

the value of area outside I want to

print over here only I want to print

area here only so you are not using

written keyword

you are not using written keyword to

written the value of your result I want

to print over there only you want print

here only then since you are not

returning any value outside of your

method then here we are taking as a

keyword void

that is a given what void void means no

written type

no written type so this wide body is

important for us before we enter into

Java

so mainly to discuss about wide keyword

only I have taken this concept called as

method or function

so don't worry on this too much now just

a basic idea just remember the terms

just remember the terms

what we use in the programming languages

like the meaning of

comments

the meaning of comments then the meaning

of keywords

the meaning of variables

the meaning of data type

how to declare the variable what is

Method or function and how to define and

the concept of written type

so if you are not giving any value

outside of your method then we have to

provide the written type as what void

World means no written type so this are

the basic concepts required

before we enter into Java

however I am going to discuss all these

Concepts once again so many times lot of

example programs we are going to do by

using all these Concepts so many

examples

so where I will be even giving

assignments triggered to you to do the

task everything I'll be taking care once

we start with the basics part

right

any questions anymore

no

all right

so in the next class I'll be entering

into Java where I'm going to start off

with Java introduction