用派生类创建对象数组

Question

int playerType = 0;
int highestScore = 0;
Player[] player = new Player[2]; // This is the array of type Player, the master class

Scanner userInput = new Scanner (System.in);

for (int i = 1; i < 3; i++)
{
    System.out.println ("Choose a type of player:");
    System.out.println ("1: Human");
    System.out.println ("2: Computer (Threshold = 20)");
    System.out.println ("3. Computer (Custom)");
    System.out.print ("? : ");

    playerType = Integer.valueOf(userInput.nextLine()); // gets input choice from user


  switch (playerType)
    {
      case 1:
        Human player[i] = new Human();
      case 2:
        Computer player[i] = new Computer();
      case 3:
        Karen player[i] = new Karen();
    }

}

if(playerNumber == 1){
  switch (playerType)
    {
      case 1:
        Human playerOne = new Human();
      case 2:
        Computer playerOne = new Computer();
      case 3:
        Karen playerOne = new Karen();
    }
}

if(playerNumber == 2){
  switch (playerType)
    {
      case 1:
        Human playerTwo = new Human();
      case 2:
        Computer playerTwo = new Computer();
      case 3:
        Karen playerTwo = new Karen();
    }
}

System.out.println(player[i].getName() + ", your turn");

Main.java:38: error: cannot find symbol
    System.out.println(player[i].getName() + ", your turn");
                                ^
symbol:   method getName()
location: class Player
1 error

每个类中的方法如下所示：

public class Karen extends Player {
private String playerName = "Karen";

public String getName(){
  return playerName;
}

}

Answer 1

感谢OldProgrammer：

更改“Human Player[i]=new Human（）；”到“Player[i]=new Human（）；”等。

理解如何派生类非常重要，我很高兴这就是它的工作方式。非常感谢你，我希望这可能会在未来帮助某人。以下是我更新的代码，以便完全澄清：

int highestScore = 0;
Player[] player = new Player[2]; 

Scanner userInput = new Scanner (System.in);

for (int i = 0; i < 2; i++)
{
    System.out.println ("Choose a type of player:");
    System.out.println ("1: Human");
    System.out.println ("2: Computer (Threshold = 20)");
    System.out.println ("3. Computer (Custom)");
    System.out.print ("? : ");

    playerType = Integer.valueOf(userInput.nextLine());

  switch (playerType)
    {
      case 1:
        player[i] = new Human();
      case 2:
        player[i] = new Computer();
      case 3:
        player[i] = new Karen();
    }

}