Wireless Networks : Future looking really exciting

With the launch of Firefox OS, and the smartphone market buzzing with activity, end users have every right to feel excited about the future. With that excitement, I was trying to look at the speed limits and the future wireless networks that are going to come in near future. Here is a very interesting comparison of data transfer rate and bit rate of popular wireless technologies :
3G = 2.1 GHZ with wave length 14.3 cm, 4G = 10 times more powerful than 3G. 5G is going to be called "mm wireless" , with a rate of : 60 GHz. No wonder it is called "beyond 2020 wireless technology". Looking at the speed difference, we can imagine how powerful is it going to be. Already feeling excited.

How to upgrade Eclipse to work with new Oracle JDK 1.8 compiler setting

Here are the steps to upgrade the existing Eclipse installation to work with newly released jdk 1.8.
Go to Help -> Install New Software. In the pop-up, in the "Work With" option, add : "http://download.eclipse.org/eclipse/updates/4.3-P-builds/". Then Accept the license agreement and install the update. Restart your eclipse workspace. Then, once your new workspace loads, select the new java 1.8 setting in the Project Facet and that's it, you can work with all the exciting new features of jdk 1.8. 

Steps to set java version in your Ubuntu machine

Following are the steps to switch the java version of your Ubuntu machine , which is really useful to switch the default java version of your machine :

# sudo update-alternatives --install /usr/bin/java java <jdk_or_jre_firectory_where_u_unzipped_jdk_or_jre>/bin/java -1

Then execute the following command to pick which version you want to set:
#sudo update-alternatives --config java