搜索文本文件中的單詞並返回其頻率

Question

如何搜索包含單詞文本的文本文件中的特定單詞並返回其頻率或出現次數？

Answer 1

使用掃描儀：

String text = "Question : how to search for a particular word in a " + 
     "text file containing texts of words and return its " + 
     "frequency or occurrences ?"; 

String word = "a"; 

int totalCount = 0; 
int wordCount = 0; 
Scanner s = new Scanner(text); 
while (s.hasNext()) { 
    totalCount++; 
    if (s.next().equals(word)) wordCount++; 
} 

System.out.println("Word count: " + wordCount); 
System.out.println("Total count: " + totalCount); 
System.out.printf("Frequency: %.2f", (double) wordCount/totalCount); 

輸出：

Word count: 2 
Total count: 24 
Frequency: 0.08 

Answer 2

閱讀這些

http://wiki.answers.com/Q/Write_a_Java_program_to_find_occurrences_of_given_word_in_a_text

http://www.devdaily.com/java/edu/pj/pj010006/

http://www.daniweb.com/forums/thread181889.html

Answer 3

• 讀取文件中的每一行。見Tutorial | Reading, Writing, and Creating Files
• 您可以使用string.contains檢查，如果行包含你正在尋找
• 增加一個int計數器字，如果字是發現