java - 编写代码以使用方法查找字符串中的单词数

Question

我一直在寻找，但在任何地方都找不到如何使用 3 种方法编写字数统计。这是到目前为止代码的样子。我不知道如何使用这些方法。我可以不使用不同的方法而只使用一种方法来做到这一点。请帮忙!!!

    public static void main(String[] args) {
    Scanner in = new Scanner (System.in);
    System.out.print("Enter a string: ");
    String s = in.nextLine();
    if (s.length() > 0)
    {
        getInputString(s);
    }
    else 
    {
        System.out.println("ERROR - string must not be empty.");
        System.out.print("Enter a string: ");
        s = in.nextLine();
    }
    // Fill in the body with your code
}

// Given a Scanner, prompt the user for a String.  If the user enters an empty
// String, report an error message and ask for a non-empty String.  Return the
// String to the calling program.
private static String getInputString(String s) {
    int count = getWordCount();
    while (int i = 0; i < s.length(); i++)
    {
        if (s.charAt(i) == " ")
        {
            count ++;
        }
    }
    getWordCount(count);
    // Fill in the body

    // NOTE: Do not declare a Scanner in the body of this method.
}


// Given a String return the number of words in the String.  A word is a sequence of 
// characters with no spaces.  Write this method so that the function call:
//      int count = getWordCount("The quick brown fox jumped");
// results in count having a value of 5.  You will call this method from the main method.
// For this assignment you may assume that
// words will be separated by exactly one space.
private static int getWordCount(String input) {
    // Fill in the body
}

}

编辑:我已将代码更改为

private static String getInputString(String s) {
    String words = getWordCount(s);
    return words.length();
}


private static int getWordCount(String s) {
    return s.split(" ");
}

但我无法将字符串转换为整数。

Answer 1

您已阅读该方法的名称，并查看注释来决定该方法内应实现什么以及应返回的值。

getInputString 方法签名应该是:

private static String getInputString(Scanner s) {

    String inputString = "";

    // read the input string from system in
    // ....

    return inputString;

}

getWordCount 方法签名应为:

private static int getWordCount(String input) {

    int wordCount = 0;

    // count the number of words in the input String
    // ...

    return wordCount;
}

main 方法应如下所示:

public static void main(String[] args) {

    // instantiate the Scanner variable

    // call the getInputString method to ... you guessed it ... get the input string

    // call the getWordCount method to get the word count

    // Display the word count
}