Java - constructor por defecto

Hola, tengo la siguiente duda, dada una clase

public class Test{ }

cual sería la forma del constructor por defecto?

Test ( )

o

public Test( )

gracias

# if a class constructor is not declared, a default constructor is supplied by the compiler

modifiers ClassName() {
super();
}

# the default constructor has the same access modifier as the class itself, either: public, protected, private or package (no modifier)
# to prevent a class from being instantiated outside the class declaration you can create a private constructor.