Atul Palandurkar

Archive for the ‘Java Tutorials’ Category

NetBeans IDE How-to : Atul Palandurkar : Packt Publishing, UK

NetBeans IDE How-to : Atul Palandurkar : Packt Publishing, UK

I was asked to write a book for Java Application Development using NetBeans IDE by PACKT Publishing, UK which is one of the leading technology books publishers in world. It will be a great experience to work with the great publishing house and their team. Thanks a lot Packt & Team.

I know, Java and NetBeans community will definitely accept the book with a grand welcome. The book is intended for Java Developers who are not aware of NetBeans IDE or those who have experience of Java development but have not used NetBeans for development of Java applications. This book can be refered by novice also to learn Java and Java application development using NetBeans IDE very easily.

My outline (contents) was selected out of few other authors and then after we signed the contract, now the book is complete and very soon the book will hit the market in different formats by the publisher in March 2013.

I just love it, I have tried my best in writing this book and to make it easier for novice to experts. It was a great pleasure working with Packt Team.

You will learn many things from this book such as :

  • Use NetBeans IDE for Java technologies
  • Develop a HelloWorld application with NetBeans IDE
  • Explore the layout of NetBeans IDE
  • Develop different Java applications in NetBeans
  • Use the Visual Designer
  • Design Java projects
  • Develop web applications using NetBeans IDE
  • Add and handle images in your application
  • Write interfaces in NetBeans IDE
  • Handle exceptions in NetBeans IDE
  • Deploy UI applications

You can pre-order the book to avail 80% discount. Instead of Packt Publishing the NetBeans IDE How-to book is also available on Amazon, Amazon UK, Barnes & Noble, Safari Books Online too.

You can buy and download the book in different formats such as e-book (pdf), e-pub, kindle book, etc.

Buy NetBeans IDE How-to Book

I hope you will like the book. After reading, please mail me your reviews.

About these ads

Hey friends,

Many students & professionals were asking that how they can change the font size in Eclipse.

 

Here is the way to change the font size in Eclipse :

  • Go to Window Menu Preferences > General > Appearance > Colors and Fonts
  • Then to change the font size : Go to Java > Java Editor Text Font > Edit
  • Now set the font & font size you wish, done.

 

See Video Tutorial for above :

Enjoy Coding!

Free Source Code

Free Source Code

Objectives :
* How to write Hello World in Java?
* How to write Hello World in C?
* How to write Hello World in PHP?
* How to write Hello World in C++?
* How to write Hello World in JavaScript?
* How to write Hello World in HTML?
* How to write Hello World in CSS?
* How to write Hello World in COBOL?

Java

class HelloWorld
{
public static void main(String args[])
{
System.out.println(“Hello World!”);
}
}

C

#include
#include
void main()
{
clrscr();
printf(“Hello World!”);
getch();
}

C++

#include
#include
void main()
{
clrscr();
cout<getch();
}

CSS

body:before
{
content: “Hello World”;
}

COBOL

****************************
IDENTIFICATION DIVISION.
PROGRAM-ID. HELLO ENVIRONMENT DIVISION.
DATA DIVISION.
PROCEDURE DIVISION.
MAIN SECTION.
DISPLAY “Hello World!”
STOP RUN
****************************

HTML

<html>
<head>
<title>Hello World Example</title>
</head>
<body>
Hello World!
</body>
</html>

JavaScript

document.write("Hello World");

PHP

<!--?php echo ‘Hello World!’ ?-->

Linux Shell Script

echo "Hello World !"

Enjoy coding!

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Free Source Code

Free Source Code

Objective :

* How to get the MAC Address of a computer?
* How to get the MAC Address of a computer using Java?
* How to get the MAC Address of a computer via programming?

import java.net.*;

class GetMac
{
public static void main(String arg[])
{
try
{
InetAddress address = InetAddress.getLocalHost();
NetworkInterface nwi = NetworkInterface.getByInetAddress(address);
byte mac[] = nwi.getHardwareAddress();
System.out.println(mac);
}
catch(Exception e)
{
System.out.println(e);
}
}
}

Note : This code will return only the first net address; if you need other detils too, get a list.

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Objectives :

  • Why Java is platform independent?
  • How java program executes?
  • What is execution flow of Java Program?
  • What are the steps to execute a Java Program?
  • What are the steps to run a Java Program?

Objective :

  • How to write a simple Java program?
  • How to write Hello in Java?
  • How to write HelloWorld in Java?
  • How to write & execute a simple Java program?
  • How to write Java program using Notepad & execute using Command Prompt?

Posted from WordPress for Android

Objective :

  • What is architecture of Java program?
Architecture of Java Program

Architecture of Java Program

While writing a java program, the above architecture need to be followed.

As the figure describes, documentation part or writing comments into program is completely optional. If you want to know, how to write comments & documentation in java? Click here

If the programmer wants to keep class in some package then only he/she will declare the package.

If we need to link any other class from some package then, we will write import statement otherwise if the classes are in same package there is no need of import statement.

Whereas class definition & program body is compulsory which will have your actual code.

In Java there are total 8 data types available which are further divided into 4 groups viz. integers, floating point numbers, character & boolean values.

Type

Size in Bytes (Bits)

Range

Default value

Contains

Integers
Byte 1 byte (8 bits) -128 to 127 0 Signed Integer
Short 2 bytes

(16 bits)

-32768 to 32767 0 Signed Integer
Int 4 bytes

(32 bits)

-2147483648 to 2147483647 0 Signed Integer
Long 8 bytes

(64 bits)

-9223372036854775808 to 9223372036854775807 0 Signed Integer
Floating point numbers
Float 4 bytes

(32 bits)

-3.4e38 to 3.4e38

(i.e. 3.4*1017)

0.0 IEEE754 Floating point number
Double 8 bytes

(64 bits)

-1.7e308 to 1.7e308

(i.e. 1.7*10151)

0.0 IEEE754 Floating point number
Characters
char 2 bytes

(16 bits)

\u0000 to \uFFFF \u0000 Unicode Characters
Boolean values
boolean 1 bit Not Applicable False true or false

Table : Data Types in Java

 

Dear Friends,

If you want to set the path for Java, there are two main types for setting system path for Java which are as follows;

  1. Temporary Path
  2. Permanent Path

For the above two types, the video describes the complete step by step procedure for setting path for Java :

Or you can go through this tutorial :

1. To check path is set or not :
a. Go to Start Menu
b. Go to Run
c. Type “cmd” without quotes to open Command prompt.
d. Get to the root directory say c:/>
e. To check whether the path is already set or not, on command prompt type “javac” without quotes & press enter/return. If the following message appears on the console screen then the path is not set.

f. But if the other message having length nearly equal to half a page then path is set.

2. Temporary Path :

To set the temporary path follow the steps given below;
a. Open Command Prompt.
b. If path is not set &  want to set it temporarily, assume the Java 1.6.0 is installed on your system, type following command on console screen :
And finally the path is set temporarily.
Note : This will work only for the current window, won’t work if you open another window.

3. Permanent Path :

To set the path permanently follow the steps given below;
a. Right Click on “My Computer Icon”.
b. Go to “Properties”.
c. Go to “Advanced” tab.
d. Click on “Environment Variables”.
e. Go to “System Variables”.
f. Find “Path” variable, select it & click “Edit”.
g. Small window will appear. Go to end by simply pressing “End” button & type following path with semicolon ( ; ) as prefix but without quotes;
    “;C:\Program Files\Java\jdk1.6.0\bin
h. Press “OK”, again “OK”, again “OK”.
And finally the path is set permanently.
i. To check whether the path is set or not simply refer details given above in the section 1.

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