JAVA统计文件中每个单词出现的数量

以你之姓@ 2023-10-01 15:43 25阅读 0赞

package demo;
    
    import java.io.*;
    import java.util.ArrayList;
    import java.util.HashSet;
    import java.util.List;
    import java.util.Set;
    import java.util.regex.Matcher;
    import java.util.regex.Pattern;
    
    /**
     * @author yeqv
     * @program A2
     * @Classname A3
     * @Date 2022/1/19 20:55
     * @Email w16638771062@163.com
     */
    public class A3 {
        
    
        public static void main(String[] args) {
        
            Set<String> set = new HashSet<>();
            List<String> list = new ArrayList<>();
            File file = new File("D:\\jdk.txt");
            Pattern pattern = Pattern.compile("\s[a-zA-Z]+\s");
            String len;
            try {
        
                BufferedReader buff = new BufferedReader(new FileReader(file));
                while ((len = buff.readLine()) != null) {
        
                    Matcher matcher = pattern.matcher(len);
                    while (matcher.find()) {
        
                        set.add(matcher.group());
                        list.add(matcher.group());
                    }
                }
            } catch (FileNotFoundException e) {
        
                e.printStackTrace();
            } catch (IOException e) {
        
                e.printStackTrace();
            }
            int b = 1;
            for (String s : set) {
        
                int a = 0;
                for (String s1 : list) {
        
                    if (s.equals(s1)) {
        
                        a += 1;
                    }
                }
                System.out.printf("%d单词：%s 数量：%d%n", b, s, a);
                b += 1;
            }
    
        }
    
    }