java - 在 Java 中将用户输入存储为字符串

Question

我一直在开发我的个人乒乓球游戏，并遇到了一个非常烦人的错误，但我无法修复。如果我运行游戏一切正常。游戏结束后，系统会提示您输入姓名。然后，该名称应存储为字符串。然后它会告诉你你的名字和你的分数。但它并没有发生这种情况，而是不存储用户输入，只是保持空白。有的请帮帮我!!!

@SuppressWarnings("resource")
public void replay() {

    JFrame frame = new JFrame("input");
    JOptionPane.showInputDialog(frame, "what is your name player 1? ");
    String playerName1 = new String();
    new Scanner(System.in);

    JOptionPane.showConfirmDialog(null, 
            "Name: " + playerName1 + "  Score: " + scorePlayer1 , "Player scores",
            JOptionPane.DEFAULT_OPTION);

    String playerName2 = new String();
    JOptionPane.showInputDialog(frame, "what is your name player 2? ");

    JOptionPane.showConfirmDialog(null,
            "Name: " + playerName2 + "  Score: " + scorePlayer2 , "Player scores",
            JOptionPane.DEFAULT_OPTION);

    int n = JOptionPane.showConfirmDialog(null,
        "Would you like to play again?",
        "Pong",
        JOptionPane.YES_NO_OPTION);

    if (n == 0){
        setup();
    } else {
        System.exit(0);
    }
}

Answer 1

您将“playerName”设置为空字符串，然后丢弃玩家的输入:

String playerName2 = new String();
JOptionPane.showInputDialog(frame, "what is your name player 2? ");

相反，将玩家的输入保存到playerName字符串中:

String playerName2 = JOptionPane.showInputDialog(frame, "what is your name player 2? ");

(这是玩家 2 的示例；只需为玩家 1 使用不同的变量(可能是playerName1)执行相同的操作即可)