java - “Main method not found in class…”但它在那里？那为什么会出错呢？

Question

我希望有人可以在这里为我提供帮助。我收到错误消息:

Main method not found in class Pythag, please define the main method as:

   public static void main(String[] args)

但是正如您在下面的代码中看到的那样，它在那里？那么为什么会出错呢？这似乎经常发生
到我在Eclipse Java EE IDE中的类。

public class Pythag {

    // All Java applications have a main() method.
    // This one does a simple Pythagorean calculation.
    public static void main(String[] args) {

        // Declare fields and initialise values(input).
        int firstNum = 17;
        int secondNum = 6;
        int answer;

        // Do the calculation (process).
        // 
        answer = (firstNum * firstNum) + (secondNum * secondNum);

        // Display the results (output).
        // 
        System.out.println("The square of the hypotenuse is "
                           + "equal to the sum of the squares "
                           + "of the other two sides.");
        System.out.println("For example...");
        System.out.println(answer + " = " + firstNum + " squared + "
                           + secondNum + " squared.");

    }
}

Answer 1

我只是尝试验证我的代码，然后运行正常？不知道问题出在哪里还是为什么不起作用，但是验证代码似乎可以解决问题，所以我们去了？