I have been learning about Java web start and got interested in its features. But can my Java app downloaded and run from browser run on a device without a JRE(Java environment) installed?
I have tried download a sample jar from browser with Java web start but my app can't run.
Second question: Is there a feature in Java web start to check for an installed JRE and automatically setup the environment?
a JRE is required on the client to run your java Web Start application as it is downloaded and executed localy and all Java applications need an installed JRE.
Java Web Start provides the option to declare a JRE (with version number) and download it if it is not installed. (But I never used it so I can't tell you how to set this up) found on wikipedia.