help with extends

class above {

void display() {

class family {

-- some functions --

}

class creature extends family {

                         public void creature() {
                         } // default constructor

                         public void creatureObj(obj y) {

            -- some functions --

                         } // creatureObj's constructor

                         public String getName() {
                                 return realName;
                         } // Accessor for realName

                         public String getColour() {
                                 return realColour;
                         } // Accessor for realColour

                         public int getLegNumber() {
                                 return legNumber;
                         } // Accessor for legNumber

                         public int getEyeNumber() {
                                 return eyeNumber;
                         } // Accessor for eyeNumber

                 } // end class creature

creature inputCreature = new creature();

System.out.println("Name is " + inputCreature.getName());
System.out.println("Colour is " + inputCreature.getColour());
System.out.println("Leg Number is " + inputCreature.getLegNumber());
System.out.println("Eye Number is " + inputCreature.getEyeNumber());

} // display
} // above

I know I'm actually calling the default constructor which returns
everything as null in the output such as for inputCreature.getName(). So
the code above is wrong.

How should I code it such that it calls the corresponding value for
inputCreature.getName() ?