5.13 Program: Soccer team roster (Java)

5.13.java

import java.util.Scanner;

public class PlayerRoster {
   public static void main(String[] args) {
      Scanner scan = new Scanner(System.in);
      int[][] players = new int[5][2];
      boolean keepAlive = true;
      char input;
      
      for (int i = 0; i < 5; i++) {
         System.out.println("Enter player " + (i+1) + "'s jersey number: ");
         players[i][0] = scan.nextInt();
         System.out.println("Enter player " + (i+1) + "'s rating: ");
         players[i][1] = scan.nextInt();
         System.out.println();
      }
      System.out.println();
      outputRoster(players, 0);
      
      while (keepAlive) {
         outputMenu();
         input = scan.next().charAt(0);
         if (input == 'q') {
            keepAlive = false;
            break;
         } else if (input == 'o') {
            outputRoster(players, 0);
         } else if (input == 'u') {
            System.out.println("Enter a jersey number: ");
            int jerseyNum = scan.nextInt();
            System.out.println("Enter a new rating for the player: ");
            int newRating = scan.nextInt();
            for (int l = 0; l < 5; l++) {
               if (players[l][0] == jerseyNum) {
                  players[l][1] = newRating;
               }
            }
         } else if (input == 'a') {
            System.out.println("Enter a rating: ");
            int rating = scan.nextInt();
            outputRoster(players, rating);
         } else if (input == 'r') {
            System.out.println("Enter a jersey number: ");
            int jerseyNum = scan.nextInt();
            boolean exists = true;
            for (int l = 0; l < 5; l++) {
               if (players[l][0] == jerseyNum) {
                  System.out.println("Enter a new jersey number: ");
                  players[l][0] = scan.nextInt();
                  System.out.println("Enter a rating for the new player: ");
                  players[l][1] = scan.nextInt();
               }
            }
            
         }
      }
      
      return;
   }
   
   public static void outputRoster(int[][] players, int min) {
      System.out.println(((min>0) ? ("ABOVE " + min) : ("ROSTER")));
      int item = 1;
      for (int[] player : players) {
         if (player[1] > min) {
            System.out.println("Player " + item + " -- Jersey number: " + player[0] + ", Rating: " + player[1]);
         }
         item++;
      }
      System.out.println();
   }
   
   public static void outputMenu() {
      System.out.println("MENU");
      System.out.println("u - Update player rating");
      System.out.println("a - Output players above a rating");
      System.out.println("r - Replace player");
      System.out.println("o - Output roster");
      System.out.println("q - Quit\n");
      System.out.println("Choose an option: ");  
   }
}

thank you

this is the version that worked for me:

import java.util.Scanner;

public class PlayerRoster {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int[][] players = new int[5][2];
boolean keepAlive = true;
char input;

  for (int i = 0; i < 5; i++) {
     System.out.println("Enter player " + (i+1) + "'s jersey number:");
     players[i][0] = scan.nextInt();
     System.out.println("Enter player " + (i+1) + "'s rating:");
     players[i][1] = scan.nextInt();
     System.out.println();
  }
  outputRoster(players, 0);
  
  while (keepAlive) {
     outputMenu();
     input = scan.next().charAt(0);
     if (input == 'q') {
        keepAlive = false;
        break;
     } else if (input == 'o') {
        outputRoster(players, 0);
     } else if (input == 'u') {
        System.out.println("Enter a jersey number: ");
        int jerseyNum = scan.nextInt();
        System.out.println("Enter a new rating for the player: ");
        int newRating = scan.nextInt();
        for (int l = 0; l < 5; l++) {
           if (players[l][0] == jerseyNum) {
              players[l][1] = newRating;
           }
        }
     } else if (input == 'a') {
        System.out.println("Enter a rating: ");
        int rating = scan.nextInt();
        outputRoster(players, rating);
     } else if (input == 'r') {
        System.out.println("Enter a jersey number: ");
        int jerseyNum = scan.nextInt();
        boolean exists = true;
        for (int l = 0; l < 5; l++) {
           if (players[l][0] == jerseyNum) {
              System.out.println("Enter a new jersey number: ");
              players[l][0] = scan.nextInt();
              System.out.println("Enter a rating for the new player: ");
              players[l][1] = scan.nextInt();
           }
        }
        
     }
  }
  
  return;

}

public static void outputRoster(int[][] players, int min) {
System.out.println(((min>0) ? ("ABOVE " + min) : ("ROSTER")));
int item = 1;
for (int[] player : players) {
if (player[1] > min) {
System.out.println("Player " + item + " -- Jersey number: " + player[0] + ", Rating: " + player[1]);
}
item++;
}
System.out.println();
}

public static void outputMenu() {
System.out.println("MENU");
System.out.println("u - Update player rating");
System.out.println("a - Output players above a rating");
System.out.println("r - Replace player");
System.out.println("o - Output roster");
System.out.println("q - Quit\n");
System.out.println("Choose an option:");
}
}

For me OP's code was near perfect, I just had to remove the System.out.println(); on line 17.