This instructable will teach you how to: 

1. Install the Java Development Kit.

2. Set system variables to easily be able to compile and execute java files.

3.  Compile and execute a Java file from Command Prompt.  

** This is mainly for Windows 7 and Vista.

Step 1: Download latest JDK

1.Follow this link: http://www.oracle.com/technetwork/java/javase/downloads/index.html
2. Click Download JDK under the download Java Standard Edition panel.
3. Choose your operating System and agree to the terms of service. **
** This will  probably be Windows since your using Command Prompt.
<p>I have a problem with step 4, it just says &quot; 'javac' is not recognized as an internal or external command, operable program or batch file</p>
<p>please help me :(</p>
<p>Hello guys,</p><p>I am new for java. I tried one small java program with the help of this blog.but i am stuck on compiling step and getting error saying file not found.</p><p>Please anyone correct me.</p><p>Regards,</p><p>Sup</p>
<p>Wonderful! I have been scouring the internet trying to figure this out without screwing stuff up. Thank you for making it so clear.</p>
<p>Hi, the tutorial has been really helpful, I have some questions, though:</p><p>1. Why do we have to type &quot;set Path=C:\Program Files\Java\jdk1.6.0_21\bin&quot; and &quot;set Path=C:\Program Files\Java\jdk1.6.0_21\bin&quot;? I tried just typing either one and it compiled just fine</p><p>2. Is there any difference between &quot;set Path=C:\...&quot; and &quot;set PATH=%PATH%;C:\...&quot; (besides the syntax)?</p><p>Thanks in advance :)</p>
In cmd javac myprogramme.java,it takes few sec and there is no error but in cmd java myprogramme,there is a msg shown is- <br>Error:Could not find or load main class myprogramme <br> <br>plz tell me how short out this prob?? <br>
<p>Truely great................. Thats all i want to say</p><p>works 100%....</p>
<p>This works 100% fine. Thanx for adding it on net.</p>
with these we have to take care of the spell and case of the class

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