Java: simple ArrayList question

[bronzefish]

Just started java few weeks ago. I am learning about ArrayList. soo i encounter this problem

public class test {

	public ArrayList<Player> players = new ArrayList<Player>();
	public Deck deck = new Deck();
	public int numPlayer =0;
	
	private void registerPlayer(){
		while(numPlayer < 2|| numPlayer > 5){
			numPlayer = keyword.readInt("Enter numner of players(2-5)> ");
		}
		for(int i=0;i<numPlayer;i++){
		String name = keyword.readString("Enter Name of Player"+(char)('A'+i)+">");
		while(name.length()<3||name.length()>8){
		System.out.println("****NAME TOO SHORT/LONG*****");
		name = keyword.readString("Enter Name of Player"+(char)('A'+i)+">");
			}
		players.add(new Player('A'+i)+ name);
		}

keyword class is a tool for me to use so never mind about that. The problem is with line 17, i cannot seem to add the player into the arraylist. Any idea? Sorry, i am very new to Java. I think it should be an easy one. I did some research but i still do not understand why.

[PhHein]

Hi,

I bet you got an Exception. Always post the exact error message and stack trace when asking questions.
You try to add new Player('A'+i)+ name into the ArrayList. I bet you wanted to append the name into the constructor parameter of Player. So you probably want: new Player('A'+ i + name).

[bronzefish]

Hi,
yes i want to append the user input into the Arraylist which is String name. I replace my codes with yours but it returns me (The constructor Player(String) is undefined). So, basically, it should function like this( i did it in a normal array but now i need it in arraylist)

players = new Player[numPlayer];
		for(int i=0;i<numPlayer;i++){
			String name = Helper.readString("Enter Name of Player"+(char)('A'+i)+">");
			while(name.length()<3||name.length()>8){
				System.out.println("NAME TOO SHORT/LONG");
				name = Helper.readString("Enter Name of Player"+(char)('A'+i)+">");
			}
			players[i] = new Player((char)('A'+i),name);

The code should act like that, but using an arraylist. Thanks for the help!

[PhHein]

Ok, so where is the error message and stack trace when you try using ArrayList?

I know what's wrong, but I want you to learn how to read error messages.

[bronzefish]

hm.. the error message appears on line 17. The error that i got when i run it is (java.lang.NoSuchMethodError: main). i think i really should start learning how to read error messages, been depending on quick fix most of the time.

[Tolls]

That says you have no main() method when trying to launch your application.

[bronzefish]

oh, sorry i accidently deleted the main() method. haha. the error when i get when i tried to run the code is:
The method add(Player) in the type ArrayList<Player> is not applicable for the arguments (String)
The constructor Player(int) is undefined

i was wondering if i need to change the constructor in my player.class because it is undefined.

[Tolls]

Those are compilation errors.
You can't add a String to an ArrayList you have defined as holding something else (Players in your case).

And yes, you need to write a Player(int) constructor if you plan on using one.