如何更改实质上创建空轮的 switch 语句？

Question

I am trying to make a four-person attack game that randomly selects the attacker and prints out the winner, but in my output, I keep getting empty rounds. I believe this is due to my switch statement but am unsure how to get the same result minus these essentially empty rounds. I have created an array of my characters to put into my randomly generated switch statement but with the if statements inside the cases are not skipped how I envisioned them being skipped. I've also tried removing the players from the array as they die, but that does not work and results in an error and exception message.

  import project3.characters.Plumber;
  import project3.characters.Vampire;
  import project3.characters.Werewolf;

  import java.util.ArrayList;
  import java.util.Random;

  public class Game {

  public static void main(String[] args) {
      GameCharacter player1 = new Plumber("Mario", 10, 20);
      GameCharacter player2 = new Fairy("Tinker Bell", 10, 20);
      GameCharacter player3 = new Vampire("Edward", 10, 20);
      GameCharacter player4 = new Werewolf("Derek", 10, 20);

      int round = 0;

      ArrayList<GameCharacter> player = new ArrayList<GameCharacter>. 
      ();

      player.add(player1);
      player.add(player2);
      player.add(player3);
      player.add(player4);

      while (player1.isAlive() || player2.isAlive() || 
          player3.isAlive() || player4.isAlive()) {
          System.out.println("Round " + (round + 1) + ": ");
          System.out.print(" " + player1 + " ");
          System.out.println(" " + player2);
          System.out.print(" " + player3 + " ");
          System.out.println(" " + player4 + " ");
          System.out.println();

          // Only two players can battle
          // if (round % 2 == 0) {
          // player1.hit(player2.attack());
          // } else
          // player2.hit(player1.attack())

          // All players randomly attack each other
          Random rand = new Random();
          int turn = rand.nextInt(12);
          switch (turn) {
          case 0:
              if (player1.isAlive() && player2.isAlive())
                  player1.hit(player2.attack());
              break;
          case 1:
              if (player1.isAlive() && player3.isAlive())
                  player1.hit(player3.attack());
              break;
          case 2:
              if (player1.isAlive() && player4.isAlive())
                  player1.hit(player4.attack());
              break;
          case 3:
              if (player1.isAlive() && player2.isAlive())
                  player2.hit(player1.attack());
              break;
          case 4:
              if (player3.isAlive() && player2.isAlive())
                  player2.hit(player3.attack());
              break;
          case 5:
              if (player4.isAlive() && player2.isAlive())
                  player2.hit(player4.attack());
              break;
          case 6:
              if (player1.isAlive() && player3.isAlive())
                  player3.hit(player1.attack());
              break;
          case 7:
              if (player3.isAlive() && player2.isAlive())
                  player3.hit(player2.attack());
              break;
          case 8:
              if (player3.isAlive() && player4.isAlive())
                  player3.hit(player4.attack());
              break;
          case 9:
              if (player1.isAlive() && player4.isAlive())
                  player4.hit(player1.attack());
              break;
          case 10:
              if (player4.isAlive() && player2.isAlive())
                  player4.hit(player2.attack());
              break;
          case 11:
              if (player3.isAlive() && player4.isAlive())
                  player4.hit(player3.attack());
              break;
          }

          if (!player1.isAlive()) {
              System.out.println(player1.getName() + " is dead!");
              // player.remove(0);
              // player1 = null
          }
          if (!player2.isAlive()) {
              System.out.println(player2.getName() + " is dead!");
              // player.remove(1);
              // player2 = null
          }
          if (!player3.isAlive()) {
              System.out.println(player3.getName() + " is dead!");
              // player.remove(2);
              // player3 = null
          }
          if (!player4.isAlive()) {
              System.out.println(player4.getName() + " is dead!");
              // player.remove(3);
              // player4 = null
          }

          if (!player4.isAlive() && !player2.isAlive() && 
              !player3.isAlive()) {
              System.out.println(player1.getName() + " is the 
           winner!");
              break;
          }
          if (!player4.isAlive() && !player1.isAlive() && 
             !player3.isAlive()) {
              System.out.println(player2.getName() + " is the 
           winner!");
              break;
          }
          if (!player4.isAlive() && !player2.isAlive() && 
          !player1.isAlive()) {
              System.out.println(player3.getName() + " is the 
         winner!");
              break;
          }
          if (!player1.isAlive() && !player2.isAlive() && 
          !player3.isAlive()) {
              System.out.println(player4.getName() + " is the 
        winner!");
              break;
          }
          
          
          round++;
          System.out.println();
          }
      }
  }

Answer 1

One way could be to maintain a flag if fight happens. Like this:

    boolean didFightHappen = true;
    while (any player alive) {
        //anounce round only if didFightHappen = true;
        // round 1 etc
        
        Random rand = new Random();
        int turn = rand.nextInt(12);
        didFightHappen = false;  // make flag false
        switch (turn) {
        case 0:
            //if fight happens then set
            // didFightHappen = true;
            break;
        }
        // at end of the switch
        if(didFightHappen == false) {
            continue; // this continues the while loop to next iteration without executing rest of the loop code
        }
        
    }

Here is the tiny version of your game:p

List<Integer> l = new ArrayList<Integer>();
l.add(1); l.add(2); l.add(3); l.add(4);
        
Collections.shuffle(l);
while(l.size()>1) {
    int a = l.remove(0); 
    int b = l.get(0);
    System.out.println("Player " + b + " attacked player " + a );
    System.out.println(a + " died!");
}
System.out.println("Player " + l.get(0) + " is the winner!");

Output:

Player 3 attacked player 4
4 died!
Player 1 attacked player 3
3 died!
Player 2 attacked player 1
1 died!
Playe 2 is the winner!