Answer 1

static - it's like "shared", it means that it will be common for all the objects of a class.

void - means nothing. In case of the function return type, it means that function returns nothing.

main - special name of the "entry point" function. The main function will be called when the program starts. So a program execution begins with main.

So in

class Whatever {
public static void main() {

}
}

all that means "declare a method in class Whatever, called main, that returns nothing, is shared among all the objects of this class, and is public (anything can access it)"

One remark though: you don't actually need an object to be able to call static method.