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Java in 7 Minutes ? - read the full article about java development, Development and from CodeWithHarry on Qualified.One
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Java is a high level, class based, object oriented programming language which was made by James Gosling in 1995 It is a general purpose programming language which was designed to Write once and compile, And to run it in different platforms It was based on the WORA principal, which refers to "Write once, Run anywhere" Java creators wished that people never had to compile the code a multiple times They just have to compile the code once and then they can easily run it on different platforms So that people dont face any problems.
Because it was made by James Gosling for Sun microsystems, He was also known as "The Father of Java" There was an Oak Tree just outside the office of James Gosling Thats why he named this language as "Oak" But later it was named "GreenTalk" Later on it was named "Java", after the Indonesian Coffee which was liked by many people Sun Microsystem approached ECBA and ISO And asked them to make a standard for JAVA But Sun microsystem themselves rejected this idea And Javas standard was not found.
JAVA was the proprietary language of Sun Microsystem Developers were still able to write Java codes for free Then how was Sun microsystem able to earn money? Sun microsystem was able to earn money by selling the Java Enterprise product.
When Java was developing, C and C++ were the most popular programming languages.
Gosling wanted Java to be a very easy and productive language even for the developers, who were already coding in C and C++.
Thats why the Java syntax was kept very close to the syntax of C and C++.
Java was originally made for the Digital Cable Industry, it was made for the TV but finally this idea was also rejected because Java was a very advanced language for Digital Cable Industry at that time.
Java was primarily made by keeping five goals in mind, which are present on your computer screen.
Java became popular with time, Java received a lots of love from the users, And android apps were also being made using Java which increased its popularity.
And finally in todays date, Java is still a very popular programming language.
Javas further development timeline is present on your computer screen So this was about the development and history of Java, now lets move towards the syntax and learn how to write a Java code "Hello World Program" can be written in Java in this way, here public is a access modifier which means this function can be accessed by anyone "Static" means its not necessary to make the object of this class to run this method "Void" means this method does not return anything And "main" means the main method, which means the execution of this particular program starts from here, String args, which are visible here, is used for command line arguement The source code of java is first compiled into bytecode using JAVAC compiler once this complier generates the Bytecode, then the Bytecode can be carried in any computer or any mobile phone, it is a platform independent Bytecode which runs similarly across devices this Bytecode is executed by Java Virtual Machine depending on the platform Comments are the texts which are ignored by Java Single line comments in Java are written in this way And Multi Line Comments in Java are written in this way Java is Statically Typed, which means you have to specify the type of variable which you want to make Java has eight different Data Types which are present on your screen Operators in Java can be written in this way User Input in Java can be accepted in this way You can print anything in Java using "System.out.println" in this way You can make Strings in Java somehow in this way There are some amazing methods which are used to manipulate the Strings in Java Some of the important methods of Strings are present on your screen To write the Conditions in Java, you can use "If-Else Statement", "If" denotes a boolean or a condition that is evaluated in Boolean, if this condition is true, the code inside the "If" is executed, and if it is false, then the code inside "Else" is executed you can also create an "If-Else" ladder in this way a very similar thing to "If-Else" is the "Switch Case Statement" which execute some block of code based on a Variable Syntax of "Switch Case Statement" is present on your screen Mainly three types of Loops are used in Java 1. Do-While Loop; 2. While Loop; and 3. For Loop, there is one "For Each Loop" The "For Loop" syntax in Java is used in this way, "For Each Loop" syntax in Java is used in this way, "While Loop" syntax in Java is used in this way, And "Do While Loop" syntax in Java is used in this way In Java you can use Arrays to store more than one Variables You can use the Syntax and some of the methods of Arrays in this way When any type of loop is running and it encounters a break statement, it will stop there Somewhat like this And if you write "continue" inside the loop, as soon as "continue" encounters, the current iteration of the loop is skipped Java is an object oriented programming langugage and it includes the concepts of class and object Any type of code that you write in Java, it is written under a class "Method" is a function that is written under a class, and you can invoke method using objects In Java Contructors can be written in this way You can make a "child class" of a particular "class" Which means that it will inherit all the properties of the Parent Class into the Child Class and the methods will also be inherited According to some rules, the inheritance code of Java is present on your screen You can override the Methods in Java, Which means if you want to change a Method in the Child Class, that was present in the Parent Class Then you can use the Method Overriding in this way Java programming includes the concept of "Abstraction" Abstraction means you can hide the implementation details In Java, Abstract Method is the method where there is no implementation And Abstract Class is the Class which can have Abstract Method as well as few Non Abstract Method There is a concept of "Interfaces" in Java Programming According to which you can assign specification to a Class Like what should the class implement and what methods will it implement This is a method of achieving Abstraction in Java programming So this was the Syntax about Java programming, I hope you have quickly learnt and understood a lot about Java Programming I will put the Cheat Sheet of Java in the description And I have made a few courses on Java Programming, I will provide those links in the description as well I want you all to access my notes on Java as I have provided handwritten notes in my Java Course You should access the course And I hope you can learn a lot about Java Programming from that course Thats it for the video guys! Thank You so much guys for watching this video and I will see you guys next time
CodeWithHarry: Java in 7 Minutes ? - Development