Question

Question 6 (6 pts)

The interface SayHello is defined as followed:

public interface SayHello

{

            void printGreeting( );

}

Write the statements to instantiate an object of the anonymous class that implements the above interface by using the following definition of printGreeting(   ) and then call the instance method printGreeting( ).

void  printGreeting(    )

{

            System.out.println(“Hello guys”);

}

Question 7 (8 pts)

The abstract class SayHello and the static method process are defined as followed:

class SayHello

{

            private String greeting;

SayHello(   )

            {

                        greeting = “Hello guys”;

            }

SayHello( String wts )

            {

                        greeting = wts;

            }

            void printGreeting( );

}

static void process( SayHello obj )

{

            obj.printGreeting(   );

}

Write the statements to instantiate an object (with its instance variable initialized with the string “Bonjour mes amis” ) of the anonymous class that extends this abstract class by using the following definition of printGreeting(   ); then write a statement to call method process by passing to it that object.

void  printGreeting(    )

{

            System.out.println( greeting );

}

Answer 1

Answer 6:
SayHello s = new SayHello() {
           public void printGreeting()

           {

           System.out.println("Hello guys");

           }
       };
s.printGreeting();
Answer 7:
SayHello s = new SayHello("Bonjour mes amis") {
          
           @Override
           void printGreeting() {
   System.out.println( greeting );
           }
       };
       s.process(s);