Skip to main content

Hello world in Java!

Java is one of the most commonly used programming languages in the world today. Most of the work you can ever think in the world of programming can be done using Java Programming. Java is used to program everything from small devices to heavy machines. Everything from your Smartphone to your ATM card is somehow supported by Java behind the scenes. In order to learn Java which you might have also heard as of the most popular Object oriented Programming language of the modern times, we must start with the trivial "HELLO WORLD" program.

Test Code : ( Use this code to display Hello World! in the console )



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







NOTE: Don't worry about anything else you see on the screen just focus on the code and rest will be discussed later in the tutorials.
Save the file as "Hello.java"the .java extension defines that its a Java file and you'll be good to go.

Watch the video below for more.


Comments

Popular posts from this blog

Is Food Security Bill really secure?

#FSB  : For the last couple of days there has been a debate on whether the Food Security Bill* is the optimum package provided to the poor and needy ones of india or is this just another gimmick by Congress to win hearts at the time of elections . So i decided to study the bill clearly and I realized that it may have some good points but this is not the last nail in the coffin. Here is what I observed in the Bill to be passed in the Parliament yet : 1) According to the bill the earlier food security plan for the BPL ( below poverty line ) residents of the country which says that 35 kg of grain is to be provided to the poor on t he basis of their ration card per family . The new FSB as presented by Congress says that now they will allocate the supply not per family but 5 kg per head . So that means a family of three getting 35 kg a month will get 15 kg grain . Is this a Food Security Bill or a Food Scarcity Bill ? 2) In every state the current pla n provides sugar , cereals

How to program pyramids using loops - 2

In this video tutorial, two of the more patterns have been discussed that relates to the similar pattern problems. What's different about these are that they also include spaces before the stars as a part of the pattern to be printed. Having this extra sub pattern to track spaces  in the desired pattern requires an extra loop to track and control it . For a brief review, We discussed that these patterns if observed carefully are just representation of tables i.e. a combination of rows and columns . And few of the cells in that table are populated with some data according to a logically programmed algorithm with represents a pattern. In these cases, the red triangles shows us the spaces represented by "sp" and therefore unlike the previous pattern these need to be managed by the loop as they occur before the stars in the pattern. So, taking the same approach of rows and columns managing loops, we will have an outer loop that tracks the rows which will start at 0

How to program pyramids using loops

While programming, beginners do come up with some form of pyramid to be printed using any kind of loops in most programming languages. This video presentation clarifies the basic concept behind coding these pyramids in any programming language and explains how these loops can be created and manipulated to obtain different outputs. If you visualize properly, these pyramids are mere TABLES, combination of rows and columns. Having said that, we can understand that there needs to be a logic to control both rows and columns of the table and do that in such a way that the desired pattern is obtained. For doing so, we use two loops in case of a simple pyramid , one for the rows and other for the columns. Since, the general convention is to represent the rows prior to columns , assuming the same, the outer loop tracks the rows and the inner loop tracks the columns. The outer loop is fairly simple and is defined starting from 0 or 1 depending on your preference in most of the cases