How many classes are in Java 15?

There are nine predefined Class objects to represent the eight primitive types and void. These are created by the Java Virtual Machine, and have the same names as the primitive types that they represent, namely boolean , byte , char , short , int , long , float , and double .

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Why is Java all in classes?

So because there’s nothing but classes in Java (except the few Java primitive types, like int, float, …) we have to define the main method, the starting point for a java application, inside a class. The main method is a normal static method that behaves just like any other static method.

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