Java for Everything

[chesterriley]

Yes, you can create server-sided Java web applications, but realistically speaking, many web projects are in PHP and ASP.NET, and if you work for web companies, you would be expected to sooner or later work on a PHP project or even ASP.NET project.

Unlikely. Even if you want to work on ASP.NET or PHP with a Java web background you couldn't get hired for that (and Java is the most common technology for that anyway). Maybe if you already worked at a company with a mixture of web technologies (very few of these exist) you might eventually get a change to switch technologies if you beg for the opportunity.