IE runs Java applets through a third-party plugin, and Java runs on Windows because the Java guys write and distribute a VM that supports Windows. Microsoft already got itself in very hot water for trying to strongarm people off of its platform entirely (Netscape antitrust case), so they're not about to try that again. You can make software for Windows, but Microsoft is going to use their clout in legally "fair" ways to make sure you don't damage their lock-in. Java was a very serious threat to MS, which is why they created .NET and built an enterprise sales apparatus around it.
Sun lost its way and Microsoft ate up most of the custom enterprise software market with .NET. A pity really; the future could've looked much different if Sun had successfully and aggressively countered .NET. MS made sure it didn't happen because write once, run anywhere meant that Windows wasn't going to be very important anymore. .NET touted similar features, but the catch was they only wrote a VM for MS platforms, incidentally.
Pre-reply: Yes, Mono exists, Microsoft made minor contributions here and there to it, but it is now and always has been a second-class citizen in this space, and Microsoft will ensure that it always will be. It seems Mono typically gets support for an API just as it becomes deprecated and its new big brother starts to emerge on Windows. That's intentional.
IE runs Java applets through a third-party plugin, and Java runs on Windows because the Java guys write and distribute a VM that supports Windows. Microsoft already got itself in very hot water for trying to strongarm people off of its platform entirely (Netscape antitrust case), so they're not about to try that again. You can make software for Windows, but Microsoft is going to use their clout in legally "fair" ways to make sure you don't damage their lock-in. Java was a very serious threat to MS, which is why they created .NET and built an enterprise sales apparatus around it.
Sun lost its way and Microsoft ate up most of the custom enterprise software market with .NET. A pity really; the future could've looked much different if Sun had successfully and aggressively countered .NET. MS made sure it didn't happen because write once, run anywhere meant that Windows wasn't going to be very important anymore. .NET touted similar features, but the catch was they only wrote a VM for MS platforms, incidentally.
Pre-reply: Yes, Mono exists, Microsoft made minor contributions here and there to it, but it is now and always has been a second-class citizen in this space, and Microsoft will ensure that it always will be. It seems Mono typically gets support for an API just as it becomes deprecated and its new big brother starts to emerge on Windows. That's intentional.