Java, what does a writing (Class) object mean?

Question

Java

I'm reading a book about Java HeadFist templates and came across this snippet WeatherData weatherData = (WeatherData) obs;What does the part after the equal sign mean? As I understand it (WeatherData) is a class, obs is an object . But why is it written like this?

Answer 1

This is a type cast. That's exactly how they googled it.