Hellow World Your first java Programme

I hope so you have configerd java correctly and set java path.you can  test your java path.just go to start menu and run then type cmd .it will open command promt then type javac in command promt if you have configured java correctly you can see  long list like this
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Sameera>javac
Usage: javac <options> <source files>
where possible options include:
  -g                         Generate all debugging info
  -g:none                    Generate no debugging info
  -g:{lines,vars,source}     Generate only some debugging info
  -nowarn                    Generate no warnings
  -verbose                   Output messages about what the compile
  -deprecation               Output source locations where deprecat
  -classpath <path>          Specify where to find user class files
on processors
  -cp <path>                 Specify where to find user class files
on processors
  -sourcepath <path>         Specify where to find input source fil
  -bootclasspath <path>      Override location of bootstrap class f
  -extdirs <dirs>            Override location of installed extensi
  -endorseddirs <dirs>       Override location of endorsed standard
  -proc:{none,only}          Control whether annotation processing
ation is done.
  -processor <class1>[,<class2>,<class3>...] Names of the annotatio
to run; bypasses default discovery process
  -processorpath <path>      Specify where to find annotation proce
  -d <directory>             Specify where to place generated class
  -s <directory>             Specify where to place generated sourc
  -implicit:{none,class}     Specify whether or not to generate cla
implicitly referenced files
  -encoding <encoding>       Specify character encoding used by sou
  -source <release>          Provide source compatibility with spec

  -target <release>          Generate class files for specific VM v
  -version                   Version information
  -help                      Print a synopsis of standard options
  -Akey[=value]              Options to pass to annotation processo
  -X                         Print a synopsis of nonstandard option
  -J<flag>                   Pass <flag> directly to the runtime sy
  -Werror                    Terminate compilation if warnings occu  @<filename>                Read options and filenames from file
if you are not configured correctly you can see  error massage.well lets start our first java programme.
1.first go to c drive and make folder name javaWorke or any suitable name. :P
2.then open note pad (we use note pad to create our java files you can use any text editor for this like notepad ++ or  psedit or any thing you like).
3.hureeeeeeee now we are going to create our very first java programme.

now we are going to create it
just open your text editor and type like this

public class hellow{
public static void main(String args[]){
System.out.println("Hellow World");


and go to file menu select save as and name it hellow.java remember to save in class name in this programme  class name is hellow if their is calss name cat we save it like cat. java
public class cat{
public static void main(String args[]){
System.out.println("Hellow World");

we save it as cat.java  
and also remember to change save as type to all files and save it. thats all.

we have to compile and run it using command prompt
go to start menu -->run box then type cmd
it will appear command prompt
now you have to reach  the palce you have saved your java file hellow.java
in this case i saved it in folder name java2z .

so i have to browe it using command prompt

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Sameera>cd\

C:\>cd java2z


now we are in correct folder.

 now we are going to compile our java file
to compile we use javac command.
C:\java2z>javac hellow.java
press enter
remenber to type extention .java
if you have compile successfully thier are no errors.
now we are going to run it type java and your class name
C:\java2z>java hellow

now it will execute and give result like
hellow world

thats it.now you have done your first java programme.

we use note pad it is little bit defecult but we can use tool like netbeans,eclips or jbuilder it is very easy.
i will post netbeans post very soon
thanks for coming.
see you.
take care!
come againg!
here is a video created by me to demostrate this activity
you can download video

8/20/2011 01:00:41 pm

good luck

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    Hi My Name Is Sameera Dissanayaka.I hope to teach Java lessons and Lots Of fun things about tecknoledgy and Cool computer tricks and meny more be with my site you can get lots of knowledge.


    June 2012
    August 2011


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