1) What is Java?
Java is a Programming Language as well as a Platform
Java is used every bit a programming to railroad train Software Applications, as well as It is used every bit Software Platform to run
Java Applications.
-----------------------------------------------
2) What is Core Java?
Java has 3 of import Editions
i. Java Standard Edition / Core Java (* Old mention J2SE)
ii. Java Enterprise Edition / Advanced Java (*Old mention J2EE)
iii. Java Micro Edition (* Old mention J2ME)
-----------------------------------------------
3) What are Java Language Basics?
i) Comments
ii) Data Types
iii) Modifiers
iv) Variables
v) Operators
vi) Flow Control (Contional, Loop, as well as Branching)
vii) Strings
viii) Arrays
ix) IO Operations, as well as File Handling
x) Methods (pre-defined, as well as User defined)
xi) Regular Expressions
xii) Exception Handling
xiii) Object Oriented progrramming
1) Inheritance
2) Polymorphism
3) Absrtaction
4) Encapsulation
-----------------------------------------------
4) How to Use Java?
Java is an Open Source Software as well as Platform independent,
For Software Development download as well as install JDK (includes JRE as well as JVM) Software,
For Run-time (to run Software Applications that developed inwards Java) download as well as install JRE (includes JVM)
Note: We tin run Java byte code on whatever supported platform.
-----------------------------------------------
5) What is Comment inwards Computer Programming?
Generally Comment is an English linguistic communication word, In reckoner programming nosotros purpose Comments for Code documentation,
> To brand the Code Readable
> To brand the Code disable from Execution.
-----------------------------------------------
6) What are Java Data Types?
A Data Type is a classification of the type of information that a variable or object tin concur inwards reckoner programming.
Java supports 2 categories of Data Types,
i) Primitive Data Types
ii) Reference Data Types.
-----------------------------------------------
7) What are Java Variables?
A named retention place to shop temporary information inside a program.
Java has 3 types of Variables,
i) Local Variables
ii) Instance Variables
iii) Class / Static Variables
-----------------------------------------------
8) What are Java Operators?
Operators are used to perform Mathematical, Comparison as well as Logical Operations.
Categories of Operators inwards Java
i) Arithmetic Operators
ii) Relational Operators
iii) Assignment Operators
iv) Bitwise Operators
v) Logical Operators
vi) Miscellaneous Operators
-----------------------------------------------
9) What are Java Control Flow Statements?
Java has Three Types of Control Flow Statements,
i) Conditional Statements
ii) Loop Statements
iii) Branching Statements
-----------------------------------------------
10) What are Java Methods?
Methods are likewise known every bit Functions.
> In Structured Programming (Ex: C Language) nosotros purpose Functions (Built-in as well as User defined)
> In Object Oriented Programming (Ex: Java Language) nosotros purpose Methods (Built-in as well as User defined)
Two types of Methods inwards Java
i) Built inwards Methods
Number Methods
Character Methods
String Methods
Array Methods etc...
ii) User defined Methods
Method amongst returning value
Method without returning whatever value.
-----------------------------------------------
11) What are Fundamentals of OOPS?
Four fundamentals of OOPS (Oriented Programming System) Concepts are,
i) Inheritance
ii) Polymorphism
ii) Abstraction
iii) Encapsulation
-----------------------------------------------