Java Interface methods

There is a rule that every member of interface is only and only public whether you define or not. So when we define the method of the interface in a class implementing the interface, we have to give it public access as child class can’t assign the weaker access to the methods.





// A Simple Java program to demonstrate that
// interface methods must be public in 
// implementing class
interface A
    void fun();
class B implements A
    // If we change public to anything else,
    // we get compiler error
    public void fun()
class C
    public static void main(String[] args)
        B b = new B();;




If we change fun() to anything other than public in class B, we get compiler error “attempting to assign weaker access privileges; was public”

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