必需:double []找到:无参数 [英] required: double [] found: no arguments

问题描述

代码:

 ArrayList <Integer> marks = new ArrayList();

 String output = "Class average:" + calculateAverage() + "\n" + "Maximum mark:" +  
 calculateMaximum() + "\n" +"Minimum mark:" + calculateMinimum() + "\n" + "Range of 
 marks:" + range;

 analyzeTextArea.setText(output);

 private double calculateAverage(double [] marks) {
 double sum = 0;
 for (int i=0; i< marks.length; i++) {
 sum += marks[i];
 }
 return sum / marks.length;
 }

忽略字符串中的其他内容(最小，最大和范围)，但对于此行，

Disregard the other things inside the string (minimum, maximum, and range) but for this line,

 String output = "Class average:" + calculateAverage() + "\n" + "Maximum mark:" +  
 calculateMaximum() + "\n" +"Minimum mark:" + calculateMinimum() + "\n" + "Range of 
 marks:" + range;

我收到一个错误:

必填:双[]
找不到:没有参数

required: double []
found: no arguments

为什么会出现此错误，我应该更改什么?

Why do I get this error and what should I change?

推荐答案

您正在以这种方式调用calculateAverage方法:calculateAverage()，不带任何参数.但是方法是这样声明的:

You're calling the method calculateAverage this way: calculateAverage(), without any argument. But the method is declared this way:

private double calculateAverage(double [] marks) 

因此，它需要一个类型为double[]的参数，但是您什么也不传递.

It thus needs one argument of type double[], but you don't pass anything.

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