• Modify the DataSet class so that it becomes a generic class
  • Name the generic version as DataSetGen.java  
  • This class should work with any class that implements Measurable, but not those classes that do not implement Measurable 
• Modify the main() method of DataSetTester so that you can run it
  • It utilizes BankAccount and BaseballPlayer (classes)  
  • it uses the DataSetGen class
  • Don't make any changes to the BankAccount or BaseballPlayer
• In a small write-up
  • Capture two screen shots of your test run
  • Discuss your learning experience in several paragraphs

 

 

public class BankAccount implements Measurable {     private double balance;    /**      Constructs a bank account with a zero balance.   */   public BankAccount()   {         balance = 0;   }    /**      Constructs a bank account with a given balance.      @param initialBalance the initial balance   */   public BankAccount(double initialBalance)   {         balance = initialBalance;   }    /**      Deposits money into the bank account.      @param amount the amount to deposit   */   public void deposit(double amount)   {        double newBalance = balance + amount;      balance = newBalance;   }    /**      Withdraws money from the bank account.      @param amount the amount to withdraw   */   public void withdraw(double amount)   {         double newBalance = balance - amount;      balance = newBalance;   }    /**      Gets the current balance of the bank account.      @return the current balance   */   public double getBalance()   {         return balance;   }    public double getMeasure()   {      return balance;   } }  

 

 

 

 

public class BaseballPlayer implements Measurable {     private double battingAverage;   private String name;   private String team;    /**      Constructs a baseball player with a zero batting average.   */   public BaseballPlayer()   {         battingAverage = 0;      name = "";      team = "";   }    /**      Constructs a baseball player with a given name, team and batting average.      @param batavg the batting average      @param name player's name      @param team player's team   */   public BaseballPlayer(String name, String team, double batavg)   {         battingAverage = batavg;      this.name = name;      this.team = team;   }    /**   Gets the name of the player.   @return the player's name   */   public String getName()   {  return name;   }      /**   Gets the ream of the player.   @return the player's team   */   public String getTeam()   {  return team;   }      /**      Gets the batting average of the player.      @return the batting average   */   public double getBattingAverage()   {         return battingAverage;   }    public double getMeasure()   {      return battingAverage;   } }


 

 

 

public class DataSet {   private double sum;   private Measurable maximum;   private int count;    /**      Constructs an empty data set.   */   public DataSet()   {      sum = 0;      count = 0;      maximum = null;   }    /**      Adds a data value to the data set.      @param x a data value   */   public void add(Measurable x)   {      sum = sum + x.getMeasure();      if (count == 0 || maximum.getMeasure() < x.getMeasure())         maximum = x;      count++;   }    /**      Gets the average of the added data.      @return the average or 0 if no data has been added   */   public double getAverage()   {      if (count == 0) return 0;      else return sum / count;   }    /**      Gets the largest of the added data.      @return the maximum or 0 if no data has been added   */   public Measurable getMaximum()   {      return maximum;   } }


 

 

 

 

public class DataSetTester {   public static void main(String[] args)   {      DataSetGen bankData = new DataSetGen();       bankData.add(new BankAccount(0));      bankData.add(new BankAccount(10000));      bankData.add(new BankAccount(2000));            System.out.println("Bank Account");      System.out.println("Average balance: " + bankData.getAverage());      System.out.println("Expected: 4000");      BankAccount max = bankData.getMaximum();      System.out.println("Highest balance: " + max.getBalance());      System.out.println("Expected: 10000");            DataSetGen battingAvgData = new DataSetGen();            System.out.println("Batting Averages");      battingAvgData.add(new BaseballPlayer("Derek Jeter", "New York Yankees", .323));      battingAvgData.add(new BaseballPlayer("Melky Cabria","San Fransico Giants", .346));      battingAvgData.add(new BaseballPlayer("Adrian Beltre","Texas Rangers", .319));            System.out.println("Average batting average: " + battingAvgData.getAverage());      System.out.println("Expected: .329");      BaseballPlayer maxA = battingAvgData.getMaximum();      System.out.println("Highest batting average: " + maxA.getBattingAverage() + " "+ maxA.getName() + " of the " + maxA.getTeam());      System.out.println("Expected: .346 Melky Cabria of the San Fransicso Giants");   } }


 

 

 

 

**   Describes any class whose objects can be measured. */ public interface Measurable {   /**      Computes the measure of the object.      @return the measure   */   double getMeasure(); }