我是一个初学java与Java的非常弱的理解。要我这已经计算在一个句子中的单词数已经工作代码，一个句子，每个字的字符总数的字符总数，我想补充的另一个功能。
我想添加一段代码，其计算字长的平均值，例如，如果我输入“哎喜猫狗I”，输出将是2.4。 （因为字符的这句话的总数为12，由字（5个字）的数量除以给出2.4平均值）。
再下面，是我的一段代码，我的工作，这是基于很多教程是我创建的，但它们都教的平均数字，而不是字长。我的想法是，我的代码应该首先计算每个字（word.length）字符的总和，然后用文字的总和（sentence.length）除以它。但似乎没有工作。能否请你帮我纠正这段代码？
{
//prints out average word length
int length = wordcount / word.length ;
sum = sum + word.length / sentence length; //this counts the sum of characters of words and divides them by the number of words to calculate the average
System.out.println("The average word length is " + sum);} //outputs the sum calculated above
{
再下面，是我的全部代码，以帮助您更好地理解我的意思。谢谢你的帮助！
public class Main
{
public static void main(String[] args)
{
Scanner in = new Scanner(System.in); //This adds a scaner/text window to the program.
while(true)
{ // have created infinite loop.
System.out.print("Enter your text or enter 'quit' to finish the program: ");
String sentence = in.nextLine();
if(sentence.equals("quit"))
{ // if enterd value is 'quit' than it comes out of loop
break;
}
else
{ //else if 'quit' wasn't typed it, the program displays whats underneath.
System.out.println("You have entered: "
+ sentence); // to print what the user has entered in the text window/scanner.
System.out.println("The total number of characters is " + sentence.length()
+ "."); // to print the total number of characters
System.out.println("This piece of text has " + countWords(sentence)
+ " words."); //this method counts the number of words in the entered sentence.
String[] words =
sentence.split(" "); // to get the individual words, splits them when the free space (" ") is found.
int maxWordLength = 0;
int wordLength = 0;
for(int i = 0; i < words.length; i++)
{
wordLength = words[i].length();
if(wordLength > maxWordLength)
{ //This piece of code is an array which counts the number of words with the same number of characters.
maxWordLength = wordLength;
}
}
int[] intArray = new int[maxWordLength + 1];
for(int i = 0; i < words.length; i++)
{
intArray[words[i].length()]++;
}
for(int i = 1; i < intArray.length; i++)
{
System.out.printf("There are " + "%d word(s) of length %d<\n>", intArray[i], i);
}
System.out.println("The numbers of characters for each word:"); //word.length method counts the number of characters for each word.
for(int i = 0; i < words.length; i++)
{
System.out.println(words[i] + " = " + words[i].length() + " characters");
}
}
}
}
{
//prints out average word length
int length = wordcount / world.length;
sum = sum + word.length / sentence
length; //this counts the sum of characters of words and divides them by the number of words to calculate the average
System.out.println("The average word length is " + sum);
} //outputs the sum calculated above
{
in.close();
}
private static int countWords(String str)
{ //this piece of code splits the words when the space (" ") is found and prints out the length of words.
String words[] = str.split(" ");
int count = words.length;
return count;
}
}
你可以尝试这样的
String input = "hello Alpha this is bravo";
String[] strArray = input.split(" ");
float totalChars = 0;
for(String s : strArray){
totalChars += s.length();
}
float words = strArray.length;
float averageWordLength = (float)(totalChars/words);
System.out.println(averageWordLength);
您只需要调用是这样的：
public static double getAverageCharLength(String str) {
String words[] = str.split(" ");
int numWords = words.length;
int totalCharacters = 0;
for(int i = 0; i < numWords; i++)
totalCharacters = totalCharacters + words[i].length();
return totalCharacters/numWords;
}
我真的不能告诉你，你要去哪里错了，因为我无法理解的混乱那是你的代码。但是，这是你应该遵循的逻辑。
注意：这将不能正确计算的平均字长，如果你的字包含特殊字符，如单引号。我不知道，如果你需要看出来的，在你的情况，但如果这样做，看看正则表达式来指定要忽略哪些字符，并使用String像contains()方法。
另外请注意，您有以下两种方法你想没有定义方法签名：
{
//prints out average word length
int length = wordcount / world.length;
sum = sum + word.length / sentence
length; //this counts the sum of characters of words and divides them by the number of words to calculate the average
System.out.println("The average word length is " + sum);
} //outputs the sum calculated above
{
in.close();
}
也许尝试去在Java语法在Oracle文档如果你是如何去正确地写这些方法不能确定。
使用split方法。下面是一个例子：
//returns the average word length of input string s
//the method is of double type since it will likely not return an integer
double avgWordLength(String s){
String delims=",;. ";//this contains all the characters that will be used to split the string (notice there is a blank space)
//now we split the string into several substrings called "tokens"
String[] tokens = s.split(delims);
int total=0;//stores the total number of characters in words;
for(int i=0; i<tokens.length(); i++){
total += tokens[i].length(); //adds the length of the word to the total
}
double avg = total/tokens.length();
return avg;
}
有你有它。