如何檢查掃描器是否為特定字符串 + 任何正整數 [Java]

Question

我需要檢查掃描儀是否持有這個：“添加（這里的任何整數）”這是代碼：

import java.util.Scanner;
public class BottleGame {
    void startGame() {
        System.out.println("Welcome to the bottle game! Please type \"help\" to learn about the game.");
        System.out.println("If you already know how the game works, feel free to start!");
        Scanner scanner = new Scanner(System.in);
        commands(scanner);
    }
    void commands(Scanner myScanner) {
        boolean again = false;
        do {
            String response = myScanner.next();
            if (response.equals("help")) {
                System.out.println("+------------------------+");
                System.out.println("help - brings up this menu");
                System.out.println("add X - makes X bottles");
                System.out.println("remove X - deletes X bottles");
                System.out.println("flip - flips a bottle");
                System.out.println("+------------------------+");
                again = true;
            }
            //Need to check if response equals "add" + any integer here
        }
        while(again == true);
    }
}

我評論了我需要這個的地方，請在代碼中尋找它。 任何幫助，將不勝感激。 提前致謝！

Answer 1

您可以為此使用正則表達式，例如"add\\\\s+\\\\d+" ，它將匹配單詞 add 后跟一個或多個空格，然后是一個或多個帶有String.matches(String)數字

} else if (response.matches("add\\s+\\d+")) {
    System.out.println("Add");
}

然后解析該值，您可以將數字分組並調用String.replaceAll(String, String)然后使用Integer.parseInt(String)像

} else if (response.matches("add\\s+\\d+")) {
    int v = Integer.parseInt(response.replaceAll("add\\s+(\\d+)", "$1"));
    System.out.println(v);
}