java - JOptionPane - 下拉菜单 : How to subtract an option that somebody has chosen?

Question

我是一名初学者，正在制作一个飞行棋板。 我正在制作一个下拉菜单选项 Pane ，其中玩家 #1 选择他想要的颜色(绿色、黄色、蓝色、红色)。 对于 2 号玩家，我希望他能够选择除 1 号玩家选择的颜色之外的所有颜色。

这是到目前为止我的代码(可能很糟糕，但我是第一次编程):

String player1;    

String[] numberOfPlayers = {"two", "three", "four"};

String inputNumberOfPlayers = (String) JOptionPane.showInputDialog(null, "How many people are playing?", "Number of Players", JOptionPane.QUESTION_MESSAGE, null, numberOfPlayers, numberOfPlayers[0]);

if(inputNumberOfPlayers.equals("two")) {

    String[] player1Color = {"green", "yellow", "blue", "red"};
    String inputColorChoices1 = (String) JOptionPane.showInputDialog(null, "What color what you like to be", "Message to Player 1", JOptionPane.QUESTION_MESSAGE, null, player1Color, player1Color[0]);

    player1 = inputColorChoices1; 

    String[] player2Color = {"green", "yellow", "blue", "red"}; 

    //and then I don't know... 

有人可以帮助我或告诉我在哪里可以找到正确的答案吗？

Answer 1

您可以使用可用颜色列表。然后，在用户选择颜色后，将其从可用列表中删除。例如:

List<String> availableColors = new ArrayList<String>(Arrays.asList(
        "green", "yellow", "blue", "red"));

String player1Color = (String) JOptionPane.showInputDialog(
        null, "What color what you like to be",
        "Message to Player 1", JOptionPane.QUESTION_MESSAGE, null,
        availableColors.toArray(), availableColors.get(0));

availableColors.remove(player1Color);

String player2Color = (String) JOptionPane.showInputDialog(
        null, "What color what you like to be",
        "Message to Player 2", JOptionPane.QUESTION_MESSAGE, null,
        availableColors.toArray(), availableColors.get(0));