Non-static Function in JAVA

How to call a function in main by creating object in java ?

 public class NonStaticFunc {

    void f()

    {

        System.out.println("Sunday");

    }

    public static void main(String[] args) {

        NonStaticFunc ob=new NonStaticFunc();

        System.out.println("Monday");

        ob.f();

        System.out.println("Friday");

    }

}

// Static keyword is not used here as object is created.//