打印数组语句

Question

当我尝试在一个单独的课程中打印myWords时，我得到一个空白的陈述。我很确定代码是正确的但是我无法打印出我想要的单词。请帮忙！

public String[] multiLetter (int n, char included)
//public String[] multiLetter(int n, char included)
//returns an array of words with at least m occurrences
//of the letter included

{   
    for (int i = 0 ; i < words.size() ; i++)    
    {
        int repeatCounter = 0;
        for (int j = 0 ; j < words.get(i).length(); j ++)
        {   
            if (included == words.get(i).charAt(j))
            {
                repeatCounter ++;
            }
        }//closes inner for loop 

        if (repeatCounter >= n)
        {
            myWords.add(words.get(i));
        }
    }

    String [] array = new String [myWords.size()];
    return myWords.toArray(array);              
}   

Answer 1

首先：使用您编码的方式，您必须收到一个String列表作为参数。 第二：你必须创建myWords变量。 我认为你的代码应该是那样的：

public String[] multiLetter (int n, char included, List<String> words)
//public String[] multiLetter(int n, char included)
//returns an array of words with at least m occurrences
//of the letter included
{   
    List<String> myWords = new ArrayList<String>();
    for (int i = 0 ; i < words.size() ; i++)    
    {
        int repeatCounter = 0;
        for (int j = 0 ; j < words.get(i).length(); j ++)
        {   
            if (included == words.get(i).charAt(j))
            {
                repeatCounter++;
            }
        }//closes inner for loop 

        if (repeatCounter >= n)
        {
            myWords.add(words.get(i));
        }
    }
    return (String[])myWords.toArray();             
}