类中的方法不能应用于给定类型 [英] method in class cannot be applied to given types

问题描述

我正在创建一个程序，该程序生成 0 到 9 之间的 100 个随机整数并显示每个数字的计数.我正在使用一个由十个整数组成的数组，计数，来存储 0、1、...、9 的数量.)

I'm creating a program that generates 100 random integers between 0 and 9 and displays the count for each number. I'm using an array of ten integers, counts, to store the number of 0s, 1s, ..., 9s.)

当我编译程序时出现错误:

When I compile the program I get the error:

RandomNumbers.java:9: 错误:RandomNumbers 类中的方法 generateNumbers 不能应用于给定类型；
generateNumbers();

RandomNumbers.java:9: error: method generateNumbers in class RandomNumbers cannot be applied to given types;
generateNumbers();

必填:int[]

找到:generateNumbers();

found:generateNumbers();

原因:实际和形式参数列表的长度不同

reason: actual and formal argument lists differ in length

我在 main 方法中调用 generateNumbers() 和 displayCounts() 方法的代码行出现此错误.

I get this error for the lines of code that I call the methods generateNumbers() and displayCounts() in the main method.

    public class RandomNumbers {

       public static void main(String[] args) {

            //declares array for random numbers
        int[] numbers = new int [99];

        //calls the generateNumbers method
        generateNumbers();

        //calls the displayCounts method        
        displayCounts();
    }

    //***************************************************************** 

    private static int generateNumbers(int[] numbers){

        for(int i = 0; i < 100; i++){
            int randomNumber;
            randomNumber = (int)(Math.random() *10);
            numbers[i] = randomNumber;
        return randomNumber;
        }

    }

    //***************************************************************** 

    private static void displayCounts(int[] numbers){
        int[] frequency = new int[10];

        for(int i = 0, size = numbers.length; i < size; i++ ){
            System.out.println((i) + " counts = " + frequency[i]);
        }

    }//end of displayCounts

    }//end of class

推荐答案

generateNumbers() 需要一个参数，而您没有传入参数！

generateNumbers() expects a parameter and you aren't passing one in!

generateNumbers() 在设置第一个随机数后也会返回 - 似乎对它试图做什么有些困惑.

generateNumbers() also returns after it has set the first random number - seems to be some confusion about what it is trying to do.

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