Java 检查玩家 ID

Question

currently working on a project and I have a player class where I have an ID that auto-increments every time an object is created and then all my objects are in an array list (PlayerList).I am trying to set the text of a label to the player name but it just skips the first player and then it won't loop back round I get a java runtime error.

This code loads all the players into the table:

public void initialize() {
    for (RadioButton button : radios) {
        button.setDisable(true);
        button.setOpacity(1);
    }
    loadPlayers();
    selectPlayer(0);
}

public void selectPlayer(int count){
    for(Player player : PlayerList) {
        if(player.getPlayerID() == count) {
            Player activePlayer = PlayerList.get(count);
            playerName.setVisible(true);
            String name = activePlayer.getName();
            playerName.setText(name);
            System.out.println(count);
            System.out.println(activePlayer);
        }
    }
}

From the code above I want to cycle through the list of players and pull the player from a count, I also have the code below to run on a button press, this code below adds to the count or resets the count.

if(count == PlayerList.size()){
        count = 0; //reset the count
    }else{
        count++;
        selectPlayer(count);
    }

When I'm running the code it always pulls the second player rather than the first one I'm not sure what is going wrong, any help will be very much appreciated.

Updated

if (count <= size) {
        Player activePlayer = PlayerList.get(count);
        playerName.setVisible(true);
        String name = activePlayer.getName();
        playerName.setText(name);
        System.out.println(count);
    }else if(count == size){
        count=0;
        selectPlayer(count);
    }

This is what I have got at the minute, it works but when I come to the last player I have to press the button twice to loop round to the start?

Answer 1

It's taking the second player cause you increment count first. The order is this:

selectPlayer(count);
count++;

Answer 2

I think that when you call the button press code the first time (assuming count == 0), it is falling into the "else" condition. In the "else" block, the first thing you do is increment count (so now, count == 1). Your first player probably has ID=0, and your second player has ID=1. To fix, switch the two lines in your else block so you select the player THEN increment count.