How is it that the getClass method in Object class is capable of dynamically returning Class?
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How is it that the getClass method in Object class is capable of dynamically returning Class?
It doesn’t return the class name – it returns the
Classrepresenting that object’s type. Each object “knows” what type it really is – that’s how casts can work or fail depending on the execution-time type.Object.getClass()just retrieves the relevant information from the object.If you have a class which only contains a single
int, each object will still take up more than 4 bytes in memory: there’s effectively an object “header” containing things like a reference to the object’s actual type, information to do with the monitor associated with that object etc.