theThe first output file includes all the words from the input file with their number of occurrences.
theThe second output file includes the words in lexicographic order.
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.util.*;
import java.io.*;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;
import java.util.Set;
public class TextAnalyzer {
private static HashMap<String, Integer> wordCount = new HashMap<String, Integer>();
public static StringBuffer stringBuffer;
public static void main(String[] args) throws IOException {
if (args.length == 0) {
System.out.println("Please specify input file as program argument");
return;
}
getWordsCount(args[0]);
String outputFileName;
Scanner scanner = new Scanner(System.in);
System.out.println("Please enter output file name:");
outputFileName = scanner.nextLine();
while (outputFileName.isEmpty()) {
System.out
.println("Invalid file name ! Please re-enter output file name:\n");
outputFileName = scanner.nextLine();
}
stringBuffer = new StringBuffer();
for (Entry<String, Integer> word : wordCount.entrySet()) {
stringBuffer.append(String.format("%s\t%d%n", word.getKey(),
word.getValue()));
}
BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(outputFileName));
bufferedWriter.write(stringBuffer.toString());
bufferedWriter.close();
Set<String> s = wordCount.keySet();
List<String> l = new ArrayList<String>(s);
Collections.sort(l);
String s2 = "";
for (int i = 0; i < l.size(); i++) {
s2 = s2 + l.get(i) + "\n";
}
System.out.println("Please enter output file name:");
outputFileName = scanner.nextLine();
while (outputFileName.isEmpty()) {
System.out
.println("Invalid file name ! Please re-enter output file name:\n");
outputFileName = scanner.nextLine();
}
bufferedWriter = new BufferedWriter(new FileWriter(outputFileName));
bufferedWriter.write(s2);
bufferedWriter.close();
scanner.close();
}
/**
* Updates the Hashmap wordCount by inserting a word as a key and its number
* of occurrences as a value.
*
* @param filename
* the file to read from
* @throws IOException
*/
private static void getWordsCount(String filename) throws IOException {
Scanner scanner = new Scanner(new File(filename));
while (scanner.hasNext() == true) {
String token = scanner.next();
Integer tokenCount = wordCount.get(token);
if (tokenCount == null) {
wordCount.put(token, 1);
} else
wordCount.put(token, tokenCount + 1);
}
scanner.close();
}// ENDD
}
