69 lines
2.0 KiB
Java
69 lines
2.0 KiB
Java
import java.io.*;
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import java.nio.charset.StandardCharsets;
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import java.util.*;
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/**
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* @author Nikita Doschennikov (me@fymio.us)
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*/
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public class WordStat {
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public static void main(String[] args) {
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if (args.length != 2) {
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System.err.println("incorrect input!");
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System.err.println("usage: java WordStat <inputFile> <outputFile>");
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}
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String inputFileName = args[0];
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String outputFileName = args[1];
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try {
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BufferedReader r = new BufferedReader(
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new FileReader(inputFileName)
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);
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LinkedHashMap<String, Integer> wordCount = new LinkedHashMap<>();
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StringBuilder sb = new StringBuilder();
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int data = r.read();
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while (data != -1) {
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char c = (char) data;
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if (
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Character.getType(c) == Character.DASH_PUNCTUATION ||
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Character.isLetter(c) ||
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c == '\''
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) {
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sb.append(c);
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} else {
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if (!sb.isEmpty()) {
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String word = sb.toString().toLowerCase();
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wordCount.put(
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word,
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wordCount.getOrDefault(word, 0) + 1
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);
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sb.setLength(0);
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}
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}
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data = r.read();
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}
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r.close();
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PrintWriter writer = new PrintWriter(
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outputFileName,
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StandardCharsets.UTF_8
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);
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for (Map.Entry<String, Integer> entry : wordCount.entrySet()) {
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String key = entry.getKey();
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int value = entry.getValue();
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writer.println(key + " " + value);
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}
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writer.close();
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} catch (Exception ex) {
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System.err.println("An error occured: " + ex.getMessage());
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}
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}
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}
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