feb22_21_Execution.java

/*   Created by IntelliJ IDEA.
 *   Author: Kshitij Varshney (kshitijvarshne1)
 *   Date: 22-Feb-21
 *   Time: 12:29 AM
 *   File: Execution.java
 */

package feb22_21;
import feb22_21.Person.FootballPlayer;
import feb22_21.Person.Height;
import feb22_21.Person.OffensiveLine;

public class Execution {
    public static void main(String[] args) {
       FootballPlayer footballPlayer= new FootballPlayer(new Height(5));
       System.out.println(footballPlayer);
        OffensiveLine offensiveLine= new OffensiveLine(new FootballPlayer("Ronaldo",new Height(21)));
        System.out.println(offensiveLine);
    }
}

feb22_21_Person.java

package feb22_21;

public interface Person {
    // create 3 attribute in the Person Interface
    String firstName=null;
    String lastName=null;
    String Color=null;

    //create a method toString which has no method
    public String toString();

    //create a new class Height
    class Height{
        // having a attribute height of integer type
        public int height;

        //Constructor of Height class
        public Height(int height) {
            this.height = height;
        }

        public int getHeight() {
            return height;
        }

        public void setHeight(int height) {
            this.height = height;
        }

        @Override
        public String toString() {
            return "Height :- "+this.height;
        }
    }
    // Create a new Class 'FootballPlayer' which is implements from Person class
    // Override the all methods of the Person class
    class FootballPlayer implements Person {
        public String name;
        public Height height;

        public FootballPlayer(Height height) {
            this.height = height;
            this.name="Messi";
        }
        public FootballPlayer(String name, Height height) {
            this.name = name;
            this.height = height;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public Height getHeight() {
            return height;
        }

        public void setHeight(Height height) {
            this.height = height;
        }

        //Override the toString method from the Person class
        @Override
        public String toString() {
            return this.name+" "+this.height;
        }
    }
    // create a OffensiveLine having a attribute footballType of type FootballPlayer type
    class OffensiveLine{
        public FootballPlayer footballPlayer;

        // constructor
        public OffensiveLine(FootballPlayer footballPlayer) {
            this.footballPlayer = footballPlayer;
        }

        public FootballPlayer getFootballPlayer() {
            return footballPlayer;
        }

        public void setFootballPlayer(FootballPlayer footballPlayer) {
            this.footballPlayer = footballPlayer;
        }

        @Override
        public String toString() {
            return "Name :- "+this.footballPlayer;
        }
    }

}