Question

Write a class that encapsulates the concept of a baseball player with the important attributes (name, position, hits, at bats, batting average). The class will have the following methods:

• Two constructors (a default and a constructor with all parameters)
• Accessors, mutators, toString, and equals methods
• The batting average property will not have a public setter, it will be updated any time the hits and/or at bats is set. The getter will round to three digits (.315 or .276, etc.)
• All properties will be validated
• The player position will be an enumeration

Your driver will use a 9 element array to represent a baseball team (do not use an ArrayList). Your driver should initialize the array with 9 valid baseball player objects.

• List the batting average for each player
• Calculate and display the total number of hits for the team
• List the players with a batting average of .300 or greater
• Sort the players based on batting average and list the players by batting average again.

Test all methods in your class(es) manually in your driver or with JUnit

Made in Java Programming Language!

Answer 1

//Baseball_Position.java

public enum Baseball_Position {

             Pitcher,

             Catcher,

             FirstBaseman,

             SecondBaseman,

             ThirdBaseman,

             Shortstop,

             LeftFielder,

             CenterFielder,

             RightFielder;

}

//end of Baseball_Position.java

//BaseballPlayer.java

public class BaseballPlayer {

      

       private String name;

       private Baseball_Position position;

       private int hits;

       private int atBats;

       private double batting_average;

       public BaseballPlayer()

       {

             name="";

             position=Baseball_Position.Catcher;

             hits=0;

             atBats=0;

             batting_average = 0;

       }

      

       public BaseballPlayer(String name, Baseball_Position position, int hits, int atBats)

       {

             this.name = name;

             this.position = position;

             setHits(hits);

             setAtBats(atBats);

             setBattingAverage();

       }

      

       private void setBattingAverage()

       {

             if(atBats > 0)

                    batting_average = ((double)Math.round((((double)hits)/atBats)*1000))/1000;

             else

                    batting_average = 0;

       }

      

       public void setHits(int hits)

       {

             if(hits >= 0)

                    this.hits = hits;

             else

                    this.hits = 0;

                   

       }

      

       public void setAtBats(int atBats)

       {

             if(atBats >=0)

                    this.atBats = atBats;

             else

                    this.atBats = 0;

       }

      

       public void setName(String name)

       {

             this.name = name;

       }

      

       public void setPosition(Baseball_Position position)

       {

             this.position = position;

       }

      

       public String getName()

       {

             return name;

       }

      

       public Baseball_Position getPosition()

       {

             return position;

       }

      

       public int getHits()

       {

             return hits;

       }

      

       public int getAtBats()

       {

             return atBats;

       }

      

       public double getBattingAverage()

       {

             return batting_average;

       }

      

       public boolean equals(BaseballPlayer other)

       {

             if((name.equalsIgnoreCase(other.getName())) && (position.equals(other.getPosition())) && (hits == other.getHits()) && (atBats == other.getAtBats()))

                    return true;

             return false;

       }

      

       public String toString()

       {

             return("Name : "+name+" Position : "+position+" Hits : "+hits+" atBats : "+atBats+" Batting Average : "+String.format("%.3f", batting_average));

       }

      

}

//end of BaseballPlayer.java

//MainBaseballPlayer.java : Driver program to test the BaseballPlayer

public class MainBaseballPlayer {

             

       // method to sort the players by batting average in descending order

       public static void sort(BaseballPlayer players[])

       {

             int max;

             for(int i=0;i<players.length-1;i++)

             {

                    max = i;

                    for(int j=i+1;j<players.length;j++)

                           if(players[j].getBattingAverage() > players[max].getBattingAverage())

                                 max= j;

                    if(max != i)

                    {

                           BaseballPlayer temp = players[i];

                           players[i] = players[max];

                           players[max] = temp;

                    }

             }

       }

      

       public static void main(String[] args) {

            

             BaseballPlayer players[] = new BaseballPlayer[9];

             players[0] = new BaseballPlayer("James Cordon",Baseball_Position.Shortstop,12,50);

             players[1] = new BaseballPlayer("Shaun Marsh",Baseball_Position.Pitcher,9,30);

             players[2] = new BaseballPlayer("Paul Day",Baseball_Position.Catcher,34,60);

             players[3] = new BaseballPlayer("Henry Fig",Baseball_Position.FirstBaseman,45,100);

             players[4] = new BaseballPlayer("Michael Hogg",Baseball_Position.SecondBaseman,34,80);

             players[5] = new BaseballPlayer("John Smith",Baseball_Position.LeftFielder,25,70);

             players[6] = new BaseballPlayer("Jack Swann",Baseball_Position.CenterFielder,44,150);

             players[7] = new BaseballPlayer("Jaden Shimp",Baseball_Position.ThirdBaseman,56,120);

             players[8] = new BaseballPlayer("Henry Fox",Baseball_Position.RightFielder,35,100);

            

             int totalHits = 0;

            

             System.out.println("Baseball Players : ");

            

             for(int i=0;i<players.length;i++)

             {

                    System.out.printf("\nBatting average of %s : %.3f",players[i].getName(),players[i].getBattingAverage());

                    totalHits += players[i].getHits();

             }

            

             System.out.println("\n\nTotal number of hits : "+totalHits);

             System.out.println("\nBaseball Players with batting average >= 0.300");

             for(int i=0;i<players.length;i++)

                    if(players[i].getBattingAverage() >= 0.300)

                           System.out.println(players[i].getName());

             System.out.println("\nSorted list of players : ");

             sort(players);

             for(int i=0;i<players.length;i++)

             {

                    System.out.println(players[i]);

             }

            

       }

}

//end of MainBaseballPlayer.java

Output: