If you look inside your Household class, you will see non of your methods are static, meaning that the class they are within needs to be instantiated before you can utilize...
As eval(BadCode) said, you don't have to rename the file. Extensions just help the Operating System determine which program to utilize to open the file by default. This is why when you click .txt...
Please don't revive a thread that has been dead for over 4 years, you need to create a new thread.
Even though you are posting a small amount of code, use the [CODE]...
Unfortunately I don't think this is possible, I took a look through some of the changes for all the different versions of Apache POI and it looks like support for XLSX wasn't added until version 3.5...
Your best bet is to look around google. I know it is 100% possible since the website http://www.systemrequirementslab.com/cyri/intro.aspx has a java way to detect all of your hardware settings.
My first though would be to use threading, in such you make the process you are running a thread and start it. Then after you start your thread (make the method call), you Thread.sleep for 10...
It's also worth noting that not all browsers support all the functionality of HTML 5 yet. In fact I don't believe there is a browser that fully 100% supports it.
Now, I've got no clue if this is possible, but from searching around and my knowledge of Linux I know of Symbolic links, which are more than short cuts but less than the direct files. So I...