正确修改arrayList中的数组

Question

我有一个通过数组工作的代码，实际上我希望传入ArrayList。

下面是示例：

public void displayOldestAge(Player[] arrayPlayer){

    if(arrayPlayer.length == 0) return;

    Player oldestPlayer = arrayPlayer[0];

    for(int i = 1; i < arrayPlayer.length; i++)
    {
        if(arrayPlayer[i].age > oldestPlayer.age)
        {
            oldestPlayer = arrayPlayer[i];
        }
    }

    System.out.println("The player oldest age is " + oldestPlayer.name + ", Age: " + oldestPlayer.age);
}

这是我现在的改编...

public void displayOldestAge(List < Player > players ){
 
    if(players.size() == 0) return;
 
    Player oldestPlayer = players(0);
 
    for(int i = 1; i < players.size(); i++){
        if(players(i).age > oldestPlayer.age)
        {
            oldestPlayer = players(i);
        }
    }
 
    System.out.println("The player oldest age is " + oldestPlayer.name + ", Age: " + oldestPlayer.age);
  }

我不明白我的错误？？我不知道正确的语法...

有关信息，这里的代码

public class Player {
 
  public String name;
  public int age;
  public boolean sex;
 
 
  public Player(String name, int age, boolean sex){
    this.name = name;
    this.age = age;
    this.sex = sex;
  }
 
  public void display(int number){
    System.out.println("-----------------------");
    System.out.println("Number : " + number);
    System.out.println("Name : " + name);
    System.out.println("Age : " + age);
    System.out.println("Sex : " + sex);
 
  }

大体上

class Main {
  public static void main(String[] args) {

    List<Player> players = new ArrayList <Player>();
    players.add(new Player("Eric", 31, true));
    players.add(new Player("Juliette", 27, false));

  }

  //displayOldestAge(players);


}

非常感谢你的帮助。

Answer 1

在使用ArrayList时，您需要使用.get（int index）方法来访问您试图访问的int index中的任何元素。