Java 我在这里做错了什么？

Question

我正在使用命令行参数:

public class Pg253E4 {
    public static void main(String[]args) {
        try {
            System.out.println(Average.average(args)); // This part is saying I don't have a method in Average called average(String[] argName)
        } catch(NullPointerException e) {
            System.out.println(e.toString());
        } catch(NumberFormatException e) {
            System.out.println(e.toString());
        } finally {
            System.out.println("Nice job");
        }
    }
}

这是另一个类:

public class Average {
    public static double average(String[] arrayString) throws NullPointerException,NumberFormatException {
        double sum=0;
        double arrayStorage[] = new double[arrayString.length];

        for(int i = 0; i< arrayString.length; i++) {
            arrayStorage[i] = Double.parseDouble(arrayString[i]);
        }
        for(int i = 0; i<arrayString.length; i++) {
            sum += arrayStorage[i];
        }
        return (sum/arrayString.length);
    }
}

我不明白为什么会弹出语法错误，提示我尚未在 Average 中声明或定义任何名为 average(String[] argName) 的方法类，当我显然这样做时。

Answer 1

尝试在主类中创建一个 Average 类型的新对象。为此，请在您的 main 方法中写入以下行:
平均a = new Average();

然后将您的 System.out.println(Average.average(args)) 更改为
System.out.println(a.average(args))