Question

Modify the program that you wrote for the last exercise in a file named Baseball9.java that uses the Player class stored within an array. The program should read data from the file baseball.txt for input. The Player class should once again be stored in a file named Player.java, however Baseball9.java is the only file that you need to modify for this assignment. Once all of the input data from the file is stored in the array, code and invoke a method named selectionSort() that sorts the array of Player objects in the ascending order of the Player Number field using the Selection Sort algorithm. Display the Number, Hits, Walks and Outs data attributes to the monitor for each array element both before and after sorting.

import java.io.FileReader;
import java.io.IOException;
import java.util.Scanner;
public class Baseball8
       {
static Player[] players = new Player[20];

public static void main(String[] args)
{
int i = 0;
   int smallestIndex =
try
   {
Scanner sc = new Scanner(new FileReader("baseball.txt"));
sc.nextLine();
while (sc.hasNext())
       {
String str = sc.nextLine();
int playerNumber = Integer.parseInt(str.split(" ")[0]);
int numberOfWalks = Integer.parseInt(str.split(" ")[1]);
int numberOfHits = Integer.parseInt(str.split(" ")[2]);
int numberOfOuts = Integer.parseInt(str.split(" ")[3]);
players[i] = new Player(playerNumber, numberOfWalks, numberOfHits, numberOfOuts);
i++;
}
}
   catch (IOException e)
   {
System.out.println("File not found!");
}

System.out.println("Player\tHits\tWalks\tOuts");
for (Player player : players) {
try {
System.out.println(player.toString());
} catch (Exception e) {

}

}
System.out.print("Enter the number of player:");
Scanner scan = new Scanner(System.in);
int number = scan.nextInt();
int indexOfPlayer = findNumber(players, number, 20);

       if (indexOfPlayer == -1)
       {

System.out.println("Player not found!");
}
   else
   {

System.out.println(players[indexOfPlayer].toString());
}

}
public static int findNumber(Player[] players, int playerNumber, int teamSize)
{
int index = -1;
for (int i = 0; i < teamSize; i++) {
try {
if (players[i].getPlayerNumber() == playerNumber) {

index = i;
}
}
       catch (Exception e)
       {

}
}
return index;
}
       }
      
   class Player
{
private int playerNumber;
private int numberOfWalks;
private int numberOfHits;
private int numberOfOuts;
       public Player()
       {
this.playerNumber = 0;
this.numberOfWalks = 0;
this.numberOfHits = 0;
this.numberOfOuts = 0;
}
public Player(int playerNumber, int numberOfWalks, int numberOfHits, int numberOfOuts)
{
super();
this.playerNumber = playerNumber;
this.numberOfWalks = numberOfWalks;
this.numberOfHits = numberOfHits;
this.numberOfOuts = numberOfOuts;
}
public int getPlayerNumber()
{
return playerNumber;
}

public void setPlayerNumber(int playerNumber)
{
this.playerNumber = playerNumber;
}

public int getNumberOfWalks()
{
return numberOfWalks;
}

public void setNumberOfWalks(int numberOfWalks)
{
this.numberOfWalks = numberOfWalks;
}

public int getNumberOfHits()
{
return numberOfHits;
}

public void setNumberOfHits(int numberOfHits)
{
this.numberOfHits = numberOfHits;
}

public int getNumberOfOuts()
{
return numberOfOuts;
}

public void setNumberOfOuts(int numberOfOuts)
{
this.numberOfOuts = numberOfOuts;
}
public String toString()
{
return playerNumber + "\t" + numberOfWalks + "\t" + numberOfHits + "\t" + numberOfOuts;
}
}

Answer 1

import java.io.FileReader;
import java.io.IOException;
import java.util.Scanner;

public class Baseball8 {
        static Player[] players = new Player[20];

        public static void main(String[] args) {
                int i = 0;
                try {
                        Scanner sc = new Scanner(new FileReader("baseball.txt"));
                        sc.nextLine();
                        while (sc.hasNext()) {
                                String str = sc.nextLine();
                                int playerNumber = Integer.parseInt(str.split(" ")[0]);
                                int numberOfWalks = Integer.parseInt(str.split(" ")[1]);
                                int numberOfHits = Integer.parseInt(str.split(" ")[2]);
                                int numberOfOuts = Integer.parseInt(str.split(" ")[3]);
                                players[i] = new Player(playerNumber, numberOfWalks, numberOfHits, numberOfOuts);
                                i++;
                        }
                } catch (IOException e) {
                        System.out.println("File not found!");
                }
                
                displayTeam(players, i);

                System.out.print("Enter the number of player:");
                Scanner scan = new Scanner(System.in);
                int number = scan.nextInt();
                int indexOfPlayer = findNumber(players, number, 20);

                if (indexOfPlayer == -1) {

                        System.out.println("Player not found!");
                } else {

                        System.out.println(players[indexOfPlayer].toString());
                }

                // Sort players.
                selectionSort(players, i);
                
                System.out.println("\nAfter sorting: ");
                displayTeam(players, i);
                
        }
        public static void displayTeam(Player[] players, int teamSize) {

                System.out.println("Player\tHits\tWalks\tOuts");
                for (int i=0; i<teamSize; i++) {
                        System.out.println(players[i].toString());
                }
        }

        public static void selectionSort(Player[] players, int teamSize) {

                for (int i = 0; i < teamSize; i++) {
                        for (int j = i + 1; j < teamSize; j++) {
                                if (players[i].getPlayerNumber() > players[j].getPlayerNumber()) {
                                        Player temp = players[i];
                                        players[i] = players[j];
                                        players[j] = temp;
                                }
                        }
                }
        }

        public static int findNumber(Player[] players, int playerNumber, int teamSize) {
                int index = -1;
                for (int i = 0; i < teamSize; i++) {
                        try {
                                if (players[i].getPlayerNumber() == playerNumber) {

                                        index = i;
                                }
                        } catch (Exception e) {

                        }
                }
                return index;
        }
}

class Player {
        private int playerNumber;
        private int numberOfWalks;
        private int numberOfHits;
        private int numberOfOuts;

        public Player() {
                this.playerNumber = 0;
                this.numberOfWalks = 0;
                this.numberOfHits = 0;
                this.numberOfOuts = 0;
        }

        public Player(int playerNumber, int numberOfWalks, int numberOfHits, int numberOfOuts) {
                super();
                this.playerNumber = playerNumber;
                this.numberOfWalks = numberOfWalks;
                this.numberOfHits = numberOfHits;
                this.numberOfOuts = numberOfOuts;
        }

        public int getPlayerNumber() {
                return playerNumber;
        }

        public void setPlayerNumber(int playerNumber) {
                this.playerNumber = playerNumber;
        }

        public int getNumberOfWalks() {
                return numberOfWalks;
        }

        public void setNumberOfWalks(int numberOfWalks) {
                this.numberOfWalks = numberOfWalks;
        }

        public int getNumberOfHits() {
                return numberOfHits;
        }

        public void setNumberOfHits(int numberOfHits) {
                this.numberOfHits = numberOfHits;
        }

        public int getNumberOfOuts() {
                return numberOfOuts;
        }

        public void setNumberOfOuts(int numberOfOuts) {
                this.numberOfOuts = numberOfOuts;
        }

        public String toString() {
                return playerNumber + "\t" + numberOfWalks + "\t" + numberOfHits + "\t" + numberOfOuts;
        }
}

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