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Thread: counting words of a text file

  1. #1
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    Default counting words of a text file

    Hi,
    I am having problems counting the number of words in a text file that i created (it has 130...input.txt) and printing that finding (number) into another text file (output)....Any help is welcomed. I have this, but it prints individual counts not a whole..and my other question is how would i print vowel/count them 2.?

    iimport java.io.*;
     
    public class FileIO {
    	 public static void main(String[] args) {
     
    		String filename = "G:\\Java 1302\\project\\FILEIO\\src\\input.txt"; // Relative pathname -- place in project directory
    		String fileContents = "G:\\Java 1302\\project\\FILEIO\\src\\output.txt"; // String to hold the contents eventually
     
    		try {
     
    		FileReader fr = new FileReader(filename);
    		BufferedReader br = new BufferedReader(fr);
    		String lineRead = br.readLine();
    		while(lineRead != null){
    		fileContents = fileContents + "\n" + lineRead;
    		lineRead = br.readLine();
    				}
     
    		br.close();
     
    		} catch (FileNotFoundException e) {
    		e.printStackTrace(); // Display the error
    		System.exit(1); // Stop the program from running
    		} catch (IOException e) {
    		e.printStackTrace();
    		System.exit(1);
    		}
     
    		String[] wordList = fileContents.split("\\s");
    		int size = wordList.length;
     
    		String [] words;
    		int [] counts;
    		words = new String [size];
    		counts = new int [size];
     
     
    		for(int i = 0; i < size; i++){
    		words[i] = wordList[i];
    		for(int j = 0; j < size; j++){
    		if(words[i].equals (wordList[j])){
    		counts[i] = counts[i] +1;
    		}
    		}
    		System.out.println( " " + counts[i]);
    		}
     
    		String outputFilename = "G:\\Java 1302\\project\\FILEIO\\src\\output.txt";
     
    		try {
    		FileWriter fw = new FileWriter(outputFilename);
    		BufferedWriter bw = new BufferedWriter(fw); // Use bw.write to write to the file
     
    		for(int i = 1; i < size; i++){
    		bw.write(words[i] + ":" + counts[i] + "\n");
    		}
    		bw.close(); // Always remember to close the file
    		} catch (IOException e) {
    		e.printStackTrace();
    		System.exit(1);
    		}
    	 }
     
     
    	 }
    Last edited by maybach230; April 23rd, 2010 at 06:25 PM.


  2. #2
    Super Moderator copeg's Avatar
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    Default Re: counting words of a text file

    Change the regex of split to also include new line characters...
    String[] wordList = fileContents.split("[\\s\\n]");

    Or, rather than placing a new line into the string when reading the file, just place a space

    fileContents = fileContents + "\s" + lineRead;

    For optimization's sake, its a bit better practice to use a StringBuilder or StringBuffer rather than 'addition' of Strings.

  3. The Following User Says Thank You to copeg For This Useful Post:

    maybach230 (April 23rd, 2010)

  4. #3
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    Default Re: counting words of a text file

    i have this now.it's counting 136 not 133 because i kno the number of words in my file...and how do i count vowels?

    this is what i have

    import java.io.*;
    import java.util.regex.*;
     
    public class FileIO {
    	public static void main(String[] args) throws IOException {
    		countWords();
    	}
     
    	public static void countWords() throws IOException {
    		FileReader inputStream = null;
    		FileWriter outputStream = null;
     
    		String filename = "G:\\Java 1302\\project\\FILEIO\\src\\input.txt"; 
    		String fileContents = "G:\\Java 1302\\project\\FILEIO\\src\\input.txt"; 
     
    		try {
     
    			inputStream = new FileReader(
    					"G:\\Java 1302\\project\\FILEIO\\src\\input.txt");
    			outputStream = new FileWriter(
    					"G:\\Java 1302\\project\\FILEIO\\src\\ouput.txt");
     
    			BufferedReader br = new BufferedReader(inputStream);
    			String lineRead = br.readLine();
     
    			while (lineRead != null) {
    				fileContents = fileContents + "\n" + lineRead;
    				lineRead = br.readLine();
    				// count words and display the count
     
    				String[] wordList = fileContents.split("[\\s\\n]");
    				int size = wordList.length;
    				// display on console word count
    				System.out.println(" the total world count is "
    						+ wordList.length);
    				// print into new file
    				outputStream.write(" the total world count is "
    						+ wordList.length);
     
    			}
    		} finally {
    			if (inputStream != null) {
    				inputStream.close();
    			}
    			if (outputStream != null) {
    				outputStream.close();
    			}
    		}
     
    	}
     
    }
    Last edited by maybach230; April 23rd, 2010 at 10:41 PM. Reason: adding more info

  5. #4
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    Default Re: counting words of a text file

    Sound good!

  6. #5
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    Default Re: counting words of a text file

    Check where the while loop closing brace is, because in the code posted, it looks to be at incorrect position.
    Only below part should be in while loop:
    fileContents = fileContents + "\n" + lineRead;
    lineRead = br.readLine();
    To investigate further, print all the words in wordList array. It sometimes happens that the last line of file is read twice.
    Also, the fileContents variable is not initialized to blank String (""). It is full file name.
    One more point, why is the input and output file name same?

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