This page is your source to download or update your existing Java Runtime Environment (JRE, Java Runtime), also known as the Java plug-in (plugin), Java Virtual. Unable to download java on windows 7 in spite of disabling of firewall before downloading.
It looks like the latest version of Java is Version 7 Update 40. If you are going to keep Java installed, then it is a very good idea (for security purposes) to install the latest updates. Which tend to come out frequently. You can either set Java to automatically install updates (When I had Java I did not select that option because frequently bad updates would be released.
And those who had auto install enabled ended up with problems). Sleeping Dogs Hkship.exe Fix. Or you can set Java to periodically check for updates and let you know. Then you can decide if you want the update and manually install it (I used that option. And usually waited a few days after the update was announced to see if anyone reported problems with the update). If you remove Java, then any programs/apps that depend upon Java will not work (such as your nieces' games).