Java

The two languages are completely unrelated. JavaScript was originally called Livescript, and was renamed when Java was introduced as a kind of cross-marketing. There was some hope that they'd be used together and evolve together. They never really were; Java applets never took off. Some of the key differences are mentioned below : 1. Java is an OOP programming language while JavaScript is an OOP scripting language. 2. Java creates applications that run in a virtual machine or browser while JavaScript code is run on a browser only. 3. Java code needs to be compiled while JavaScript code are all in text. 4. They require different plug-ins. All the best

Hi Rati,
Both are good, but if you are thinking of only jobs, CCNA certified people are given preference.
In java, you have to think of algorithms and syntax to apply the logic, you don't have to understand much but you have to think much. As for the CCNA-CCNP, its purely networking. It have less syntax but more thinking and understanding. It consists of network designing. You have to design networks between devices and make them communicate each other. The more you can imagine, the more you will learn.
Hope this information helps. Please feel free to revert. Click on the thumbs up or mark it as the best, if you found this useful.
Wish You Luck!