Question

Program: Soccer team roster

This program will store roster and rating information for a soccer team. Coaches rate players during tryouts to ensure a balanced team.

(1) Prompt the user to input five pairs of numbers: A player's jersey number (0 - 99) and the player's rating (1 - 9). Store the jersey numbers in one int array and the ratings in another int array. Output these arrays (i.e., output the roster). (3 pts)

Ex:

Enter player 1's jersey number:

84

Enter player 1's rating:

7

Enter player 2's jersey number:

23

Enter player 2's rating:

4

Enter player 3's jersey number:

4

Enter player 3's rating:

5

Enter player 4's jersey number:

30

Enter player 4's rating:

2

Enter player 5's jersey number:

66

Enter player 5's rating:

9

ROSTER

Player 1 -- Jersey number: 84, Rating: 7

Player 2 -- Jersey number: 23, Rating: 4

...

(2) Implement a menu of options for a user to modify the roster. Each option is represented by a single character. The program initially outputs the menu, and outputs the menu after a user chooses an option. The program ends when the user chooses the option to Quit. For this step, the other options do nothing. (2 pt)

Ex:

MENU

u - Update player rating

a - Output players above a rating

r - Replace player

o - Output roster

q - Quit

Choose an option:

(3) Implement the "Output roster" menu option. (1 pt)

Ex:

ROSTER

Player 1 -- Jersey number: 84, Rating: 7

Player 2 -- Jersey number: 23, Rating: 4

...

(4) Implement the "Update player rating" menu option. Prompt the user for a player's jersey number. Prompt again for a new rating for the player, and then change that player's rating. (1 pt)

Ex:

Enter a jersey number:

23

Enter a new rating for player:

6

...

(5) Implement the "Output players above a rating" menu option. Prompt the user for a rating. Print the jersey number and rating for all players with ratings above the entered value. (2 pts)

Ex:

Enter a rating:

5

ABOVE 5

Player 1 -- Jersey number: 84, Rating: 7

...

(6) Implement the "Replace player" menu option. Prompt the user for the jersey number of the player to replace. If the player is in the roster, then prompt again for a new jersey number and rating. Update the replaced player's jersey number and rating. (2 pts)

Ex:

Enter a jersey number:

4

Enter a new jersey number:

12

Enter a rating for the new player:

8

SOLVE IN JAVA

Answer 1

import java.util.*;
import java.util.stream.IntStream;
public class Soccer {

   public static void main(String[] args) {
       // TODO Auto-generated method stub
       Scanner scan=new Scanner(System.in);
       //Intialising two arrays to length of 5
       try {
       int[] jersey=new int[5];
       int[] ratings=new int[5];
       for(int i=0;i<5;i++) {
           System.out.println("Enter player "+String.valueOf(i+1)+"'s jersey number:");
           jersey[i]=scan.nextInt();
           while(jersey[i]<0 || jersey[i]>99) {
               System.out.println("Enter jersey number range from 0 to 99");
               System.out.println("Enter player "+String.valueOf(i+1)+"'s jersey number again:");
               jersey[i]=scan.nextInt();
           }
           System.out.println("Enter player "+String.valueOf(i+1)+"'s rating:");
           ratings[i]=scan.nextInt();
           while(ratings[i]<1 || ratings[i]>9) {
               System.out.println("Enter ratings range from 1 to 9");
               System.out.println("Enter player "+String.valueOf(i+1)+"'s rating again:");
               ratings[i]=scan.nextInt();
           }
       }
       for(int i=0;i<5;i++)
           System.out.println("Player "+String.valueOf(i+1)+" -- Jersey number: "+String.valueOf(jersey[i])+", Rating: "+String.valueOf(ratings[i]));
       while(true) {
           char ch;
           int number,index,value,count=0,valueJersey;
           System.out.println("MENU\nu - Update player rating\na - Output players above a rating\nr - Replace player\no - Output roster\nq - Quit");
           System.out.println("Enter the option to be performed: ");
           ch=scan.next().charAt(0);
           if(ch=='u') {
               System.out.println("Enter jersey number:");
               number=scan.nextInt();
               //Finding value in the array using intstream
               index=IntStream.range(0, 5)
           .filter(i -> number == jersey[i])
           .findFirst() // first occurrence
           .orElse(-1);
               if(index==-1)
                   System.out.println("Jersey number is not found");
               else {
                   System.out.println("Enter a new rating for player:");
                   value=scan.nextInt();
                   ratings[index]=value;
               }
           }
           else if(ch=='o') {
               for(int i=0;i<5;i++)
                   System.out.println("Player "+String.valueOf(i+1)+" -- Jersey number: "+String.valueOf(jersey[i])+", Rating: "+String.valueOf(ratings[i]));
           }
           else if(ch=='a') {
               System.out.println("Enter a rating:");
               value=scan.nextInt();
               System.out.println("ABOVE "+String.valueOf(value));
               for(int i=0;i<5;i++) {
                   if(ratings[i]>value) {
                       System.out.println("Player "+String.valueOf(count+1)+" -- Jersey number: "+String.valueOf(jersey[i])+", Rating: "+String.valueOf(ratings[i]));
                       count=count+1;
                   }
               }
           }
           else if(ch=='r') {
               System.out.println("Enter a jersey number:");
               number=scan.nextInt();
               index=IntStream.range(0, 5)
           .filter(i -> number == jersey[i])
           .findFirst() // first occurrence
           .orElse(-1);
               if(index==-1)
                   System.out.println("Jersey number is not found");
               else {
                   System.out.println("Enter a new jersey number:");
                   valueJersey=scan.nextInt();
                   System.out.println("Enter a rating for the new player less than 9:");
                   value=scan.nextInt();
                   jersey[index]=valueJersey;
                   ratings[index]=value;
               }
           }
           else if(ch=='q') {
               System.out.println("Program is terminated");
               break;
           }
           else {
               System.out.println("Enter correct character which is in menu");
           }
       }
       }
       catch(Exception InputMismatchException) {
           System.out.println("Error: Enter only numbers.");
       }
   }

}
Sample input and sample output:

Enter player 1's jersey number:
1
Enter player 1's rating:
1
Enter player 2's jersey number:
2
Enter player 2's rating:
2
Enter player 3's jersey number:
3
Enter player 3's rating:
3
Enter player 4's jersey number:
4
Enter player 4's rating:
4
Enter player 5's jersey number:
5
Enter player 5's rating:
5
Player 1 -- Jersey number: 1, Rating: 1
Player 2 -- Jersey number: 2, Rating: 2
Player 3 -- Jersey number: 3, Rating: 3
Player 4 -- Jersey number: 4, Rating: 4
Player 5 -- Jersey number: 5, Rating: 5
MENU
u - Update player rating
a - Output players above a rating
r - Replace player
o - Output roster
q - Quit
Enter the option to be performed:
f
Enter correct character which is in menu
MENU
u - Update player rating
a - Output players above a rating
r - Replace player
o - Output roster
q - Quit
Enter the option to be performed:

o
Player 1 -- Jersey number: 1, Rating: 1
Player 2 -- Jersey number: 2, Rating: 2
Player 3 -- Jersey number: 3, Rating: 3
Player 4 -- Jersey number: 4, Rating: 4
Player 5 -- Jersey number: 5, Rating: 5
MENU
u - Update player rating
a - Output players above a rating
r - Replace player
o - Output roster
q - Quit
Enter the option to be performed:
a
Enter a rating:
3
ABOVE 3
Player 1 -- Jersey number: 4, Rating: 4
Player 2 -- Jersey number: 5, Rating: 5
MENU
u - Update player rating
a - Output players above a rating
r - Replace player
o - Output roster
q - Quit
Enter the option to be performed:
q
Program is terminated