How To Install & Configure Java JDK On Your Computer?

How to enable your computer for java programming?

First,download Java Development Kit(JDK) form one of the following addresses-

http://www.oracle.com/technetwork/java/javase/downloads/index.html

http://download.cnet.com/Java-Development-Kit-32-bit/3000-2218_4-12091.html

http://download.cnet.com/Java-Development-Kit-64-Bit/3000-2218_4-75317068.html

http://java-development-kit-jdk.en.softonic.com/

Double click the downloaded file(in our example,it should be named as  jdk-7u6-windows-i586.exe) and follow the installation process,there will be two installations,one for the JDK, another is JRE(Java Runtime Environment).

After the installation,go to Command Prompt by pressing Windows Key+R. Type java -version and hit enter,it'll show interpreter's version. Then type javac -version and hit enter. If the javac command completed successfully then you don't have to follow the steps below. But,if you get an error like this-  'javac' is not recognized as an internal or external command,operable program or batch file ,then do the following-

Go to Start -> Control Panel -> System -> Advanced System Settings -> Environment Variables, select the system varable named "Path" and click the Edit button. Add the address of java's bin sub-directory at the end of the list in the Variable Value field(in our example C:\Program Files\Java\jdk1.7.0_06\bin) then click the ok button.

To test the environment open command prompt by pressing Windows Key+R.

Type java -version and hit enter to see interpreter's version number.

And type javac -version and hit enter to see compiler's version number.

Both the versions should match. If it matches,you're ready to do java programming!

Note: Other than java programming,if you install the jdk,you'll be able to run java-archives(i.e .jar files) on your computer! There are plenty of java applets(small applications) are available on the internet for free! Also java is needed for surfing various internet sites.

That's all!

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http://www.youtube.com/sujoyn70

I've uploaded many videos about calculator tricks,math and engineering tutorials,electronics DIY projects,technology how-to videos,funny animal videos,travel videos etc in my youtube channel.

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Top 5 Most Watched Videos From My Youtube Channel

Hi friends,today I'll share with you top 5 most watched videos from my Youtube channel. In my channel,I regularly upload videos related to technology,how-to,DIY, and tutorials on scientific calculators. My video on Casio fx-991ES programmable scientific calculator has got record number of views! These calculator tricks are a must watch for anybody doing engineering,BSc,MSc,PHd or just schooling,or preparing for competitive exams. I've also have separate category of videos for electronics projects and technology how-to, like- "make a simple musical doorbell", "how to add your photo+lyrics to any mp3 song without any extra software". Very soon I'll upload engineering study related videos. I'm linking the videos below,watch them. If you like them,please hit like on Youtube,and don't forget to subscribe to my youtube channel- www.youtube.com/sujoyn70

By subscribing,you'll get notified whenever I upload a new video.

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How To Record Macro or Close Up Videos On Nokia N82, N95 Phones

I'm back after a long break!

Today I'll tell you how to record macro or closeup videos with your Nokia n-series. I'm not the inventor of the trick,I found the trick on the internet,but here I've explained the trick for you in detail,with a self explanatory video at the end of this article.

Well I own a Nokia N82,I can take pictures of very close objects with my N82,anything within the range of about 5-6cms from the lens,with the auto-focus camera. But I got very disappointed when I tried to record videos of closer objects(like phone's screen,or a book's page), because all the macro videos came blurry.

But,now I'll tell you how to overcome this-

Step1- Slide your N82's back camera cover,camera application will launch.

Step2- Choose video mode.

Step3- Now the tricky part! Gently hit the N82(I really mean gently,over impact may cause damage to the camera module) against your palm,while the camera facing towards the palm. You'll get an idea that how much force to apply,from my video below. Now focus the phone to any close object,and see the difference! If your videos are still blurry,try hitting the phone again.

Step4- Now start recording and enjoy the full potential of your Nseries!

But how and why this trick works? As far I've understood,these older generation phones have a bulkier camera module,allowing more gap for the lens to move within, so when hitting them against any surface,the lens moves forward; thus changing the focal length of the module temporarily and changing the focus to nearer objects. And again when using the camera in Image mode,auto focus motor will again bring the lens to preset position,canceling the effect of this trick. This tricks does not work on modern n-series phones with compact camera module,like N79,on which I also tried the trick.

This trick may also work on other Nseries phones of that times like N95,N95 8GB,N73 etc.

Warning- Do it AT YOUR OWN RISK. I'm not responsible anyways for any damage of your phone or camera. I use this on my N82 whenever I need to take videos of any close object,and I've not faced any problem with my phone's camera still now.

11 Cool Features Of Opera Mini And Mobile You Might Not Know About!

Today I'll tell you about some of the cool features of Opera Mini and Opera Mobile. Read on!

1. Multi Tab Browsing- You can browse more than one webpage at a time on Opera Mini and Mobile. To do so,just press the small "+" sign on the right of the Opera Mini/Mobile title bar. Or you can press and hold(touch and hold for touch screen phones) on any link and select "Open in a new tab". To toggle between tabs, press * + joystick left or right.



2. Opera Link- Are you tired of creating all your bookmarks again after formatting your phone? Now forget that! You can sync all your bookmarks and speed dials between all your phones(if you have more than one phone like me:-) and also with your computer if you use Opera Browser on your computer. To do so,go to settings or press #8, select Opera Link,create a user id and password,follow the instructions and all your data will be backed up. You can use that id and password on several phones to get the data synced between them.



3. Touchable Speed Dials- You can add 9 of your favorite websites at 9 touchable speed dial on Opera Mini. At the home page of Opera Mini,press and hold on any of the speed dials and choose "edit", on the next window type your favorite website's name and make it! To open speed dials,press * and number 1 to 9 respectively,like for first speed dial,press *1. On touch screen phones,you can directly touch on the speed dials to open them.



4. Quick Search Bar- Suppose you are surfing a website, suddenly you wanted to search something on Google,rather than manually going to www.google.com and searching,you can press #2 and type your search term and press enter to search.

5. Find in Page- You are reading an article on internet,and you want to search a specific word from the article,press #3 or choose "find in page" from menu, type your word and press enter. Opera will find the word for you!

6. Download Manager- To access download manager,press #7 or choose "Downloads" from menu. You will see download manager. You can download several files simultaneously. And you can also pause or resume downloads.

7. Text Copy and Paste- You have found a site with funny jokes on the internet,you want to copy them,how can you do that?
Press and hold joystick at where the jokes starts,choose the option "Select Text",mark the text with joystick, again press and hold joystick and select "copy". You can paste this text in a sms or on notes on your phone.

8. Landscape Browsing- If you have a touchscreen phone and you want to browse internet
in landscape mode(means horizontally,like when you watch videos), go to menu and choose "Landscape Mode" or press *# on a keypad phone,and surf internet at full-screen!

9. Save Page- You have found a very good romantic poem on the internet,you want to save that page so that you can write it down on diary later when you're free. Press #9 or choose "Saved Pages" from menu,and save the page. You can view the page even when you don't have internet on your phone.

10. Remember Password- Like a computer,Opera Mini can remember your password and user name,so you don't have to type your password and id every time to open your email. Just press "yes" when Opera ask "Remember user name and password for this site?" when your enter password for first time.

11. Keypad Shortcuts-
# + 1 = Open URL
# + 4 = Go to Start Page
# + 5 = Bookmarks
# + 6 = History
# + 0 = Reload the page
* + Right Joystick = Next Tab
* + Left Joystick = Previous Tab

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N.B- Please watch my YOUTUBE CHANNEL at www.youtube.com/sujoyn70 to watch more infotainment videos! You're surely gonna love that!

Thanks for reading!