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DATA TYPES IN JAVA PROGRAMMING – tccicomputercoaching.com

In this article we will learn about the java data types.

Variable is a memory location where we can store the data. There are three types of variables: local, instance and static. There are two types of data types in java, primitive and non-primitive.

Data Types in Java

In general every programming language is containing three categories of data types. They are

  • Fundamental or primitive data types
  • Derived data types
  • User defined data types.

datatype-in-java

Primitive data types

Primitive data types are those whose variables allows us to store only one value but they never allows us to store multiple values of same type. This is a data type whose variable can hold maximum one value at a time.

Data Type Default Value Default size
boolean false 1 bit
char ‘\u0000’ 2 byte
byte 0 1 byte
short 0 2 byte
int 0 4 byte
long 0L 8 byte
float 0.0f 4 byte
double 0.0d 8 byte

 

The Java programming language is statically-typed, which means that all variables must first be declared before they can be used. This involves stating the variable’s type and name, as you’ve already seen:

int gear = 1;

int a;  // valid

a=10;  // valid

User defined data types

User defined data types are those which are developed by programmers by making use of appropriate features of the language.

In java both derived and user defined data type combined name as reference data type.

Student  s = new  Student();

Integer Data Type:

Data Type Size Range
1 Byte 1 + 127 to -128
2 Short 2 + 32767 to -32768
3 Int 4 + x to – (x+1)
4 Long 8 + y to – (y+1)

 

Char Data Type

 
Data Type Size(Byte) Range  
Char 2 232767 to -32768  

Float Data Type

Data Type Size Range Number of decimal places
Float 4 +2147483647 to -2147483648 8
Double 8 + 9.223*1018 16

Boolean Data Type

Boolean data type takes zero bytes of main memory space because Boolean data type of java implemented by Sun Micro System with a concept of flip – flop. A flip – flop is a general purpose register which stores one bit of information (one true and zero false).

Default Values

It’s not always necessary to assign a value when a field is declared. Fields that are declared but not initialized will be set to a reasonable default by the compiler. Generally speaking, this default will be zero or null, depending on the data type. Relying on such default values, however, is generally considered bad programming style.

User Defined Data Type:

Typedef

A typedef associates a name with another data type. Here is the syntax of an IDL typedef:

typedef type identifier;

The type can be any basic IDL data type, a user-defined data structure

typedef int unit;

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In Ahmedabad Find Out The Java Learning Centre

Welcome to TCCI-Tririd Computer Coaching Institute. We are a Gujarat (India) based Computer coaching institute at Ahmedabad and we focus on providing best teaching to students through different learning method/media. we try our best to give best quality education without any burden at efficient cost.

online-java-coaching-tcci

We teach following topics in Java course:

  1. Basic Introduction to Java
  2. Object Oriented Programming
  3. Basic Data types and Variables
  4. Modifier Types
  5. Operators
  6. Loop controls
  7. Decision Making
  8. Arrays and String
  9. Methods
  10. Inheritance
  11. Interface
  12. Package
  13. Polymorphism
  14. Overriding
  15. Encapsulation
  16. Abstraction
  17. Exception

Course duration: Daily/4 days/3 Days/2 Days.

Class Mode: Theory with Practical.

Lecture Timing: At student’s convenience.

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What is method overriding in Java? – tccicomputercoaching.com

When method of child class redefines the method of parent class then it is called method overriding in Java.

method-overriding-in-Java_simple

Overriding is done so that a child class can give its own implementation to a method which is already provided by the parent class. In this case the method in parent class is called overridden method and the method in child class is called overriding method.

A method can only be written in Subclass not in same class. The argument list should be exactly the same as that of the overridden method. The return type should be the same or a sub type of the return type declared in the original overridden method in the super class. A method declared final cannot be overridden.

Example:

1. class Human

2. { public void eat()

3. { System.out.println(“Human is eating”); }}

4. class Boy extends Human

5. { public void eat()

6. { System.out.println(“Boy is eating”); }

7. public static void main( String args[])

8. { Boy obj = new Boy(); obj.eat(); }}

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Loop in C Language – tccicomputercoaching.com

What is Loop in Programming?

To write once, but execute more than one time is called Loop in Programming. This will save time of developer to write n time.

Loop-C-Language_simple

3 type of Loop:

  • for
  • while
  • do-while

We see one by one in detail.

There are 3 sections in each loop:

there is loop variable i/j

1. initialization i=1 or i=10

2. condn check i<=10 or i>=1

3. update (++ or –) i=i+1 or i++ i–

e.x. We want to print 10 time “hello world”. Then what is the syntax in coding?

Let us see.

1. for loop

for (i=1;i<=10;i++)

{

Printf (“hello world\n”);

}

Here, all 3 sections are in same statement. First initialization executed always. Then control goes to the condition checking. If condition is true then only control entered into the loop and statement inside the loop will be executed. Then control goes to the updating, again condition checking , and same process will continue until condition will be false.

2. While Loop

i=1;

while(i<=10)

{
printf (“hello wolrd\n”);

i++;

}

Here , initialization is outside of Loop. Then control goes to the condition checking. If condition is true then only control entered into the loop and statement inside the loop will be executed. Then control goes to the updating, again condition checking , and same process will continue until condition will be false.

3. do -while Loop

i=1;

do

{

printf (“hello wolrd\n”);

i++;

} while (i>=10);

Here, also initialization is outside of Loop. But in this Loop condition is last , so control direct enter into the loop and one time statement inside the loop will be executed. Then updating and last control rich to the condition checking. If condition is true then control again entered into the loop , and process will be continue until condition will be false.

Thus , Do – While loop is different than previous two loop. Here condition is last , so , if condition is false yet output will execute one time. When in previous two loop condition is false then output will not execute once.

Second difference is : in do-while there is semi colon at last.

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Our course include all Computer course, Web Designing Course , Project Training, Basic Computer Course, Programming Course etc.

We have team of qualified and experienced Faculties who teach all important
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Basic Structure of C Programming – tccicomputercoaching.com

Following structure helps programmer to develop code easily in C Programming.

Basic-Structure-of-C_simple

1. documentation

2. directive preprocessor

stdio.h

(printf-scanf) #include<stdio.h>

conio.h

(clrscr – getch)

3.#define (optional)

4. global declaration(optional)

5. void main()

{ —-execution start

int a,b; ——————>1. declaration part

clrscr();

__________________>2. executable part

getch();

}—-execution complete

6. userdefined fn()

{

process……

…………

}

Hope this will help every learner.

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What is Hibernate in Java?-tccicomputercoaching.com

Hibernate is an open-source Object-relational mapper solution in Java. It is lightweight and overcomes all the shortcomings that we face while working with JDBC.

Hibernate-in-Java_simple

It provides a framework for mapping an object-oriented domain model to a relational database. … Hibernate also provides data query and retrieval facilities.

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Learn Coding in C at TCCI-tccicomputercoaching.com

Introduction:

Initially , C was designed to implement the Unix operating system. But because of flexibility of its use for memory management C programming language is so popular and used so widely .

Learn-Coding-C_Simple (1)

C language is a building block for many other currently known languages. C language has variety of data types and powerful operators. D

Riding on these advantages, C became dominant and spread quickly beyond Bell Labs replacing many well-known languages of that time, such as ALGOL, B, PL/I, FORTRAN, etc. C language has become available on a very wide range of platforms, from embedded microcontrollers to supercomputers.

Use of C:

Operating System

Mobile and Computer Game

Networking

Embedded System

Benefits :

-It can be used for low-level programming, such as scripting for drivers
and kernels and it also supports functions of high-level programming
languages, such as scripting for software applications etc.

– C is highly portable.

-C language has a rich library which provides a number of built-in
functions.

C implements algorithms and data structures swiftly.

C is a structured programming language which allows a complex program to be
broken into simpler programs called functions.

C language is case-sensitive which means lowercase and uppercase letters
are treated differently.

C program is basically a collection of functions that are supported by the C library this makes us easier to add our own functions to C library. Due to the availability of large number of functions, the programming task becomes simple.

There are only 32 keywords in ANSI C and its strength lies in its built-in functions. Several standard functions are available which can be used for developing programs.

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Programming Languages taught at TCCI:

We teach various Programming Languages like C, C++, Java, Python, Database Management, Python, Data Structure HTML,CSS, Java Script, .Net , PHP, System Programming Compiler Design, Boot Strap, Angular Js etc. online and offline both.

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What Are The Data Types Available In Python? tccicomputercoaching.com

Data Types in Python :

To differentiate data into different categories we have Data Types.

Data-Types-Python_simple

Here is the list of most commonly used built-in types that Python supports:

Immutable built-in datatypes of Python

  • Numbers
  • Strings
  • Tuples

Mutable built-in datatypes of Python

  • List
  • Dictionaries
  • Sets

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How Does Python Handle Memory Management? tccicomputercoaching.com

Python uses private heaps to maintain its memory. So the heap holds all the Python objects and the data structures. This area is only accessible to the Python interpreter; programmers can’t use it.

And it’s the Python memory manager that handles the Private heap. It does the required allocation of the memory for Python objects.

Python-Handle-Memory-Mana_simple

 

Python employs a built-in garbage collector, which salvages all the unused memory and offloads it to the heap space.

Python is most popular Language in present time.

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What is JavaFX? tccicomputercoaching.com

What is JavaFX?

JavaFX stands for Java “special EFF-ECTS” as FX is normally the abbreviation given to special effects mostly sound or visual. JavaFX is a Java  library using which you can develop Rich Internet Applications.

_JavaFX_simple

Why is used JavaFX?

JavaFX is a framework for the GUI with several benefits, including animations and CSS integration.

JavaFX is a Java library used to build Rich Internet Applications. The applications written using this library can run consistently across multiple platforms. The applications developed usingJavaFX can run on various devices such as Desktop Computers, Mobile Phones, TVs, Tablets, etc.

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