搜索文本文件中的单词并返回其频率

Question

如何在包含单词文本的文本文件中搜索特定单词并返回其频率或出现次数？

Answer 1

使用扫描仪：

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);

输出：

Word count:  2
Total count: 24
Frequency:   0.08

Answer 2

阅读这些

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

• 读取文件中的每一行。请参阅Tutorial | Reading, Writing, and Creating Files
• 您可以使用string.contains检查该行是否包含您要查找的字词
• 如果找到单词，则增加一个int计数器