Applications like browsers, etc. are written in Java, Python, etc. But when they are installed on a system that doesn't have Java or Python installed, how does it ensure that its code runs there ?
Actually, I wanted to write a browser in Java with WebKit as engine. Since the developer tools for WebKit are available for Linux only through Qt or GTK, to make a platform-independent browser, I need to make it through Qt (specifically, QtJambi). But the problem is that I think that then, the browser will run only on platforms that support Qt. This is very inconvenient as this normally is not a prerequisite of any commmon browser.