Question

Description:

You have been asked to help the College of IST Running Club by designing a program to help them keep track of runners in the club, the races that will occur, and each runner's performance in each race!

Requirements:

Please use Java to implement the program

Your program must:

• Store information about each Runner.
• Store information about each Race.
• Store information about the performance of each runner in each race that they compete in. Note that each race may have many runners, and each runner may compete in many races.

-----------------

Step 1: Your Runner class.

- Create a Runner class that stores runner ID, first name, last name, gender, and age.

- Override toString() to properly display all attributes.

- Create all constructors, getters, and setters as necessary

-----------------

Step 2: Your Race class.

- Create a Race class that stores race ID, race location, and race date.

- Override toString() to properly display all attributes.

- Create all constructors, getters, and setters as necessary

-----------------

Step 3: Connecting Runners and Races

- In addition to simply storing information about runners and races as described above, we must store the following data:

• The list of runners participating in each race
• The list of races participated in by each runner
• The finishing time of each runner in each race
• The finishing position of each runner in each race

Note that there are a few ways to accomplish this. you will be graded (in part) on the quality of your design choices. This may include the creation of another class/classes or the use of other data structures. NOTE: You may not use a Map data structure for this assignment.

-----------------

Step 4: Your RunningClub class.

- Create a RunningClub class that leverages the classes we created earlier in order to provide the following methods:

• addRunner() : Adds a runner to the club. It should take the runner ID, first name, last name, gender, and age as parameters. It should succeed (and return true) if the runner ID parameter doesn't already exist, and fail (and return false) otherwise.
• addRace(): Adds a race. It should take the race ID, race location, and race date as parameters. It should succeed (and return true) if the race ID parameter doesn't already exist, and fail (and return false) otherwise.
• recordCompletedRace(): Records information about the completion of a race. The parameters will vary depending on your implementation choices, but it should record the runner, the race, the finishing time of that runner in that race, and the finishing position of that runner in that race.
• showAll(): Displays all runners, all races, and all information about completed races.

-----------------

Step 5: Your main() method

In your main method:

• Create an instance of your RunningClub class
• Use the addRunner() method (repeatedly) to add 2 runners.
• Use the addRace() method (repeatedly) to add 3 races.
• Use the recordCompletedRace() method (repeatedly) to record each runner completing at least 2 races.
• Use the showAll() method to display all information in the system.

-----------------

Step 6: Create a UML Class diagram for all of your classes.

Your diagram should use the three-block structure shown in class (with Name, Attributes, and Methods), label associations, and include multiplicity. You may draw your diagram on paper and take a picture, or use another tool.

Answer 1

Runner class:

public class Runner {
   private static Runner[] idlist=new Runner[1000];//max 1000 runners possible
   private static int count=0;
   private int id;
   private String firstName;
   private String secondName;
   private char gender;//takes 'm' for male and 'f' for female
   private int age;//takes values from 6 to 100
   private int racecount=0;

   public int getid()
   {
       return this.id;

   }

   public String getfirstName()
   {
       return this.firstName;
   }

   public String getsecondName()
   {
       return this.secondName;
   }

   public char getgender()
   {
       return this.gender;
   }

   public int getage()
   {
       return this.age;
   }

   public String toString()
   {
       String ans = "ID :"+this.id+"\n"+"Name: "+this.firstName+" "+this.secondName+"\n"+"Age: "+this.age+"\n"+"Gender: "+this.gender;
       return ans;
   }
   public Runner[] getidlist()
   {
       return this.idlist;
   }
  

   public Runner(int id,String firstName,String secondName,char gender,int age ) throws ErrorCase
   {
       if (count==1000)
           {
               System.out.println("Max runners filled! ");
               throw new ErrorCase();
           }
       if (age<=100 && age>6 && (gender=='m' || gender=='f'))
       {
           for(int i=0;i<count;i++)
               {
                   if (idlist[i].getid()==id)
                       System.out.println("ID already present!");
                   throw new ErrorCase();
               }
           this.firstName = firstName;
           this.secondName = secondName;
           this.age=age;
           this.gender=gender;
           this.id = id;
           idlist[count]=this;
           count++;
       }
       else
       {
           throw new ErrorCase();
       }

   }

}

Race class:

public class Race{
   private static Race[] idlist=new Race[1000];//max 1000 races possible
   private static int count=0;
   private int id;
   private String location;
   private String date;//Format "dd/mm/yyyy" a,check condition is not being added here.
   private static double[][] stats = new double[1000][3];
   private static int statcount=0;

   public int getid()
   {
       return this.id;

   }

   public String getlocation()
   {
       return this.location;
   }
   public String getdate()
   {
       return this.date;
   }
   public static boolean addstats(int id,double time,int pos)
   {
       stats[statcount][0]=id;
       stats[statcount][1]=time;
       stats[statcount][2]=pos;
       statcount++;
       return true;
   }
   public static double[][] getstats()
   {
       return stats;
   }
   public static int getcount()
   {
       return count;
   }
   public static Race[] getidlist()
   {
       return idlist;
   }
   public Race(int id,String location,String date) throws ErrorCase
   {
       if (count==1000)
           {
               System.out.println("Max runners filled! ");
               throw new ErrorCase();
           }

       for(int i=0;i<count;i++)
           {
               if (idlist[i].getid()==id)
                   System.out.println("ID already present!");
               throw new ErrorCase();
              
           }
       this.id=id;
       idlist[count]=this;
       count++;
       this.location=location;
       this.date=date;
   }

}

ErrorCase class(I made it for an implementation purpose):

public class ErrorCase extends Exception{
   public String toString()
   {
       return "Something wrong with your input, check!";
   }
}

RunningClub class:

public class RunningClub{
   public static boolean addRunner(int id,String firstName,String secondName,char gender,int age)
   {
       try
       {
           Runner var = new Runner(id,firstName,secondName,gender,age);
           return true;

       }
       catch(ErrorCase e)
       {
           return false;
       }
   }
   public static boolean addRace(int id,String location,String date)
   {
       try
       {
           Race ver = new Race(id,location,date);
           return true;
       }
       catch(ErrorCase e)
       {
           return false;
       }
   }

   public static void recordCompletedRace(int runnerid,int raceid,double time,int pos)
   {
       for(int i=0;i<Race.getcount();i++)
       {
           if (Race.getidlist()[i].getid()==raceid)
           {
               Race.getidlist()[i].addstats(runnerid,time,pos);
           }

       }
   }
   public double[][] showAll()
   {
       return Race.getstats();
   }
}

These four class must be in the same file. Main.java is obvious and the UML diagram can be made from the class definition itself.