Operators in Java

Operators in Java

What is operators?

Operators is a symbol and special type of functions which help to perform actions.

Example : 

Addition (+), 
Substraction (-), 
Multiplication (*)

There are following types of operators:

Arithmetic Operators

Assignment Operator

Bitwise Operators

Instance of operator

Interesting Questions

Logical Operators

Precedence and Associativity

Relational Operators

Shift Operators

Ternary Operator

Unary Operators

Data-Types

Data Types in Java

What is Data Types?

Data Types is associated with type of data. Data type is set limit of size and limit of values that can be stored. Data Type is only deciding behavior of variable like Numeric Data Type will not  act like String / Character data type.

There are two types of Data Types:

• Primitive Data Types
• Non-Primitive Data Types

Primitive Data Types:

Following are types of primitive data types-

• byte
• short
• int
• long
• float
• double
• boolean
• char

Non-Primitive Data Types:

Following are types of primitive data types-

• String
• Array

What is difference between Pascal Case and Camel Case ?

What is Pascal Case and Camel Case ?

There are two types of coding writing pattern.
1. Pascal Case 
2. Camel Case

Pascal Case: The first letter of every word in the identifier is upper case.

Example:
GetSchoolName 
GetTotalFeesByStudentRollNo

Camel Case: The first letter of the first word will be small in the identifier and next all word(s) first letter will be upper case. 

Example:

getSchoolName

getTotalFeesByStudentRollNo

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Naming Conventions in Java

Java naming conventions are very simple. Here we provide step by step java training. Following are naming conventions rules for followings:

• Class
• Interface
• Method
• Variable
• Package
• Constant

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Class: Class name should be start with the capital letter (Uppercase)  and followed by small letter(Lowercase) and next word first letter should be capital letter (Uppercase), without any white space (no-gap) between words. Write class name in Pascal case.

Example:

public class EmployeeDailyReport

{

  ///Code

}

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Interface: Interface name should be start with capital letter (uppercase) and followed by small letter (lowercase) and next word first letter should be capital letter (Uppercase), without any white space (no-gap) between words. Write interface name in Pascal case.

Example:

interface EmployeeBasicRule

{

  ///Code

}

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Method: Method name should start with small letter(lowercase) and with the first letter of next word in capital letter (uppercase). Write method name in Camel Case.

public void getEmployeeNetSalary

{

   //code

}

Java Class, Interface, Package, Constant, Variable Naming Conventions

Variable : For writing variable name you should follow the following rules:

• Write in very short names.
• Should not start with underscore or any special characters.
• Should not start with numeric character.
• It should start with Character.
• Don't use reserve keywords in Variable name.

Example:

string FullName

Java Naming Conventions 

Package: Package name should be write in small letter (lowercase). Package name should be separated with .(dot) . Package name should have main title / department name. Like Sales, Purchase, HR because package is grouping of classes, interfaces.

Example:

package com.Employee.Attendance

Constant in Java YCMOU

Constant: Constant name should be start in capital letter (uppercase). Constant name should be separated with _ (underscore).

Example:

static final int Max_Salary = 45000;

Variable and Naming Rules

What is Identifiers in java?

What is Identifiers?
Name of Class , Variable  and methods, functions called Identifiers.

Variable in Java

What is Variable? A variable is thing which created and stay in memory and it contain a data value.




Naming rules in Java:
All variable/class name (identifiers) should start with alphabet letter, an underscore _ or dollar  $ sign.

After the first character variable can have numeric character.
No space or special characters are allowed.

Java reserved keyword cannot be used as variable name.

Example:
Valid Variable Name
SchoolName
_schoolName
School_Name
School12Name


Not Valid Variable Name
12SchoolName 
(SchoolName)

What is JDK, JRE and JVM?

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What is JDK ?

Java Development Kit (JDK). A key component for building java applications.
Heart of Java application development.

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What is JRE?

Java Runtime Environment (JRE). Its helpful and provide to only environment to run the code not for development / coding in Java.

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What is JVM?

Java Virtual Machine (JVM). Its responsible for exceute the program. JVM work as per "Write once, run everywhere". JVM required to run program on any device.

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Difference in the working of C++ and Java

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Difference in the working of C++ and Java?

C++	JAVA
Support multiple inheritances.	Does not support multple inheritances.
Support pointer mechanism.	Does not support pointer mechanism.
Use only compiler.	Use compiler and interpreter both.
Support both Method Overloading and Operator Overloading.	Support Method Overloading but no operator overloading.
Based on C language.	Based on C and C++ language.
Execute code directly.	Execute code with the help of JVM (Java Virtual Machine).
Support GOTO statement.	Does not support GOTO statement.
Used CIN  for input and COUT for output .	Used System.In for Input and System.Out.println for output.

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YCMOU P131 BCA Course Detail

YCMOU P131 BCA Course Detail

BCA - P131  - Course Detail

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YCMOU FYBCA - First Year Bachelor Computer Application Syllabus

YCMOU FYBCA syllabus is very simple and easy to learn. 

YCMOU FYBCA Syllabus
CODE	SUBJECT NAME		THEORY / PRACTICAL
AEC001	English Communication	Semester - 1	THEORY
CMP501	Mathematics	Semester - 1	THEORY
CMP502	Problem Solving using Computers	Semester - 1	THEORY
CMP503	Programming using C++	Semester - 1	THEORY
CMP701	Lab: Mathematics	Semester - 1	PRACTICAL
CMP702	Lab: Problem solving using Computers	Semester - 1	PRACTICAL
CMP703	Lab: Programming using C++	Semester - 1	PRACTICAL
Semester - 2
ENV121	Environmental Studies	Semester - 2	THEORY
CMP504	Statistics	Semester - 2	THEORY
CMP505	Data Structure using C++	Semester - 2	THEORY
CMP506	Computer Networks	Semester - 2	THEORY
CMP704	Lab: Statistics	Semester - 2	PRACTICAL
CMP705	Lab: Data Structure using C++	Semester - 2	PRACTICAL
CMP706	Lab: Computer Networks	Semester - 2	PRACTICAL

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YCMOU SYBCA - Second Year Bachelor Computer Application Syllabus

YCMOU SYBCA syllabus is very simple and easy to learn. 

CODE	SUBJECT NAME		THEORY / PRACTICAL
ICT151	IT and E-Learning Skills	Semester - 3	THEORY
CMP507	Operating System	Semester - 3	THEORY
CMP508	Web Technologies	Semester - 3	THEORY
CMP509	Database Management System	Semester - 3	THEORY
CMP707	Lab: Operating System	Semester - 3	PRACTICAL
CMP708	Lab: Web Technologies	Semester - 3	PRACTICAL
CMP709	Lab: Database Management System	Semester - 3	PRACTICAL
Semester - 4
OPN272	Financial and Investment Skills	Semester - 4	THEORY
CMP510	Computer System Architecture	Semester - 4	THEORY
CMP511	Software Engineering	Semester - 4	THEORY
CMP512	Java	Semester - 4	THEORY
CMP710	Lab: Computer System Architecture	Semester - 4	PRACTICAL
CMP711	Lab: Software Engineering	Semester - 4	PRACTICAL
CMP712	Lab: Java	Semester - 4	PRACTICAL

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YCMOU TYBCA - Third Year Bachelor Computer Application Syllabus

YCMOU TYBCA syllabus is very simple and easy to learn. 

CODE	SUBJECT NAME		THEORY / PRACTICAL
CMP332	Quantitative Aptitude	Semester - 5	THEORY
CMP513	E-Commerce Technologies	Semester - 5	THEORY
CMP514	Advance JAVA	Semester - 5	THEORY
CMP515	Linux Administration	Semester - 5	THEORY
CMP713	Lab: E-Commerce Technologies	Semester - 5	PRACTICAL
CMP714	Lab: Advance JAVA	Semester - 5	PRACTICAL
CMP715	Lab: Linux Administration	Semester - 5	PRACTICAL
Semester - 6
OPN273	Personality and Career Skills	Semester - 6	THEORY
CMP516	Android Programming	Semester - 6	THEORY
CMP517	PHP Programming	Semester - 6	THEORY
CMP716	Lab: Android Programming	Semester - 6	THEORY
CMP717	Lab: PHP Programming	Semester - 6	PRACTICAL
CMP801	Project : BCA	Semester - 6	PRACTICAL

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