Above all, you firstly have to check your current version of java installed on your System. For this open the Command prompt window an type the command “java -version"
Check for updates
As Java on your machine is installed and there comes update for its new version time to time. You can check manually that is there any update available or not. Go to Control panel and type Java in search box and then open the result it gives.
Now go to “Update" bar and click on “Update Now".
If your Java version is already updated, it will give you pop up message that your version is updated. Otherwise you can download it from the links below.
Java 8 Update 121 full setup direct download links
If you don’t have Java installed, you can use the following direct download links to the offline installers of Java 8 update 121 (latest at this time of writing).