JAVA TUTORIALS FOR BEGINNER: programming

Java static method

blogger 0 core java, method, program, programming, static 07:33

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Java
 static method program: static methods in Java can be called without 
creating an object of class. Have you noticed why we write static 
keyword when defining main it's because program execution begins from 
main and no object has been created yet. Consider the example below to 
improve your understanding of static methods.

<h2>
Java static method example program</h2>
<div class="geshifilter">
<pre class="java geshifilter-java" style="font-family: monospace;">class Languages {
 public static void main(String[] args) {
 display();
 }
 
 static void display() {
 System.out.println("Java is my favorite programming language.");
 }
}</pre>
<pre class="java geshifilter-java" style="font-family: monospace;"> </pre>
</div>
Output 
 
<img alt="Java static method program" src="http://www.programmingsimplified.com/images/java/java-static-method-program.png" /> 
 
<h2>
Java static method vs instance method</h2>
Instance method requires an object of its class to be created before 
it can be called while static method doesn't require object creation.

<div class="geshifilter">
<pre class="java geshifilter-java" style="font-family: monospace;">class Difference {
 
 public static void main(String[] args) {
 display(); //calling without object
 Difference t = new Difference();
 t.show(); //calling using object
 }
 
 static void display() {
 System.out.println("Programming is amazing.");
 }
 
 void show(){
 System.out.println("Java is awesome.");
 }
}</pre>
</div>
Output 
 
<img alt="Static vs instance method program" src="http://www.programmingsimplified.com/images/java/static-method-vs-non-static-method.png" /> 
 
<h3>
Using static method of another classes</h3>
If you wish to call static method of another class then you have to 
write class name while calling static method as shown in example below.

<div class="geshifilter">
<pre class="java geshifilter-java" style="font-family: monospace;">import java.lang.Math;
 
class Another {
 public static void main(String[] args) {
 int result;
 
 result = Math.min(10, 20); //calling static method min by writing class name
 
 System.out.println(result);
 System.out.println(Math.max(100, 200));
 }
}</pre>
</div>
Output

<div class="geshifilter">
<pre class="java geshifilter-java" style="font-family: monospace;">10
200</pre>
</div>
Here we are using min and max methods of Math class, min returns 
minimum of two integers and max returns maximum of two integers. 
Following will produce an error:

<div class="geshifilter">
<pre class="java geshifilter-java" style="font-family: monospace;">min();</pre>
</div>
We need to write class name because many classes may have a method with same name which we are calling.

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Java static method

Java static method program: static methods in Java can be called without creating an object of class....

Factorial program in java

blogger 0 coding, factorial, java, program, programming 07:22

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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg7eXoeSEA_fi3WsjRxXjWEhEGwv0dqxbVSQgDnOq14xWqKGayeayYpnDTtYzjX6TJ1d7acVjhinE07K1P1H14y7UGYhr3I3lVf7VFuDtWQtvtpKx40TbCLkVTq7YNINGSH_MQgdTqQNq_M/s1600/factorial+program+in+java.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="274" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg7eXoeSEA_fi3WsjRxXjWEhEGwv0dqxbVSQgDnOq14xWqKGayeayYpnDTtYzjX6TJ1d7acVjhinE07K1P1H14y7UGYhr3I3lVf7VFuDtWQtvtpKx40TbCLkVTq7YNINGSH_MQgdTqQNq_M/s1600/factorial+program+in+java.JPG" width="320" /></a></div>
 
 
 
 
 
 
 
 
import java.util.Scanner;  class Factorial {    public static void main(String args[])    {       int n, c, fact = 1;       System.out.println("Enter an integer to calculate it's factorial");       Scanner in = new Scanner(System.in);       n = in.nextInt();       if ( n < 0 )          System.out.println("Number should be non-negative.");       else       {          for ( c = 1 ; c <= n ; c++ )             fact = fact*c;          System.out.println("Factorial of "+n+" is = "+fact);       }    } } 
 
 
OUTPUT 
 
 
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEib1JzvMc0cBsjVGSUemQ5vQ2OOP7B7rjEmqo5bOBHvHPtWcr0RcYi-4Wt4ww8hJzahE03s7rp2y5DxvtdZSdFMZniljaE0QJzk8zmVjkaYIZiTTalbper0hS2Bpw-i8XkwguPVLFTmHh7i/s1600/factorial-java.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="165" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEib1JzvMc0cBsjVGSUemQ5vQ2OOP7B7rjEmqo5bOBHvHPtWcr0RcYi-4Wt4ww8hJzahE03s7rp2y5DxvtdZSdFMZniljaE0QJzk8zmVjkaYIZiTTalbper0hS2Bpw-i8XkwguPVLFTmHh7i/s1600/factorial-java.png" width="320" /></a></div>
 
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Factorial program in java

import java.util.Scanner; class Factorial { public static void main(String args[]) { int n, c, fact = 1; S...

Introduction To Java

blogger 0 Basics, guide, java, language, programming 21:13

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<div class="blogaway-section">
Java
 programming language was originally developed by Sun Microsystems which
 was initiated by James Gosling and released in 1995 as core component 
of Sun Microsystems' Java platform (Java 1.0 [J2SE]). 
 
As of December 2008, the latest release of the Java Standard Edition
 is 6 (J2SE). With the advancement of Java and its widespread 
popularity, multiple configurations were built to suite various types of
 platforms. Ex: J2EE for Enterprise Applications, J2ME for Mobile 
Applications. 
 
Sun Microsystems has renamed the new J2 versions as Java SE, Java EE
 and Java ME respectively. Java is guaranteed to be Write Once, Run 
Anywhere. 
 
Java is: 
 
Object Oriented: In Java, everything is an Object. Java can be easily extended since it is based on the Object model. 
 
Platform independent: Unlike many other programming languages 
including C and C++, when Java is compiled, it is not compiled into 
platform specific machine, rather into platform independent byte code. 
This byte code is distributed over the web and interpreted by virtual 
Machine (JVM) on whichever platform it is being run. 
 
Simple:Java is designed to be easy to learn. If you understand the basic concept of OOP Java would be easy to master. 
 
Secure: With Java's secure feature it enables to develop virus-free,
 tamper-free systems. Authentication techniques are based on public-key 
encryption. 
 
Architectural-neutral :Java compiler generates an 
architecture-neutral object file format which makes the compiled code to
 be executable on many processors, with the presence of Java runtime 
system. 
 
Portable:Being architectural-neutral and having no implementation 
dependent aspects of the specification makes Java portable. Compiler in 
Java is written in ANSI C with a clean portability boundary which is a 
POSIX subset. 
 
Robust:Java makes an effort to eliminate error prone situations by 
emphasizing mainly on compile time error checking and runtime checking. 
 
Multithreaded: With Java's multithreaded feature it is possible to 
write programs that can do many tasks simultaneously. This design 
feature allows developers to construct smoothly running interactive 
applications. 
 
Interpreted:Java byte code is translated on the fly to native 
machine instructions and is not stored anywhere. The development process
 is more rapid and analytical since the linking is an incremental and 
light weight process. 
 
High Performance: With the use of Just-In-Time compilers, Java enables high performance. 
 
Distributed:Java is designed for the distributed environment of the internet. 
 
Dynamic: Java is considered to be more dynamic than C or C++ since 
it is designed to adapt to an evolving environment. Java programs can 
carry extensive amount of run-time information that can be used to 
verify and resolve accesses to objects on run-time. 
 
History of Java: 
James Gosling initiated the Java language project in June 1991 for use 
in one of his many set-top box projects. The language, initially called 
Oak after an oak tree that stood outside Gosling's office, also went by 
the name Green and ended up later being renamed as Java, from a list of 
random words. 
 
Sun released the first public implementation as Java 1.0 in 1995. It
 promised Write Once, Run Anywhere (WORA), providing no-cost run-times 
on popular platforms. 
 
On 13 November 2006, Sun released much of Java as free and open 
source software under the terms of the GNU General Public License (GPL). 
 
On 8 May 2007, Sun finished the process, making all of Java's core 
code free and open-source, aside from a small portion of code to which 
Sun did not hold the copyright. 
And finally we got a language which is simple, secure ,robust,reliable.</div>
 </div>

Introduction To Java

Java programming language was originally developed by Sun Microsystems which was initiated by James Gosling and released in 1995 as co...

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