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Thread: Scanning Document Issue

  1. #1
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    Default Scanning Document Issue

    Hi, this may seem like a basic question but I am a little new to this, so here goes:

    I need to scan a .txt file for a certain line of text, and if the text is contained in the file to output the number of times it occurs and the line of actual text in two seperate jtextfields.

    I am using the filereader class, should I be using the scanner class instead?

    thanks.


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    Super Moderator Norm's Avatar
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    Default Re: Scanning Document Issue

    Either will do the job.

  3. #3
    mmm.. coffee JavaPF's Avatar
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    Default Re: Scanning Document Issue

    Hello redvenice. Welcome to the Java Programming Forums.

    You can easily use the Scanner class to do this. I have wrote a quick example for you.

    For the purpose of this example I have created a file called data.txt which contains:

    hello this is a test
    this is a test
    this is a test program
    my name is monkey
    javaprogrammingforums.com
    hello java
    test test test test
    javaprogrammingforums.com
    test test test test
    test test test test
    test test test test
    The line we are looking for in the data file is 'javaprogrammingforums.com'

    The code to do this is here:

    import java.io.File;
    import java.io.FileNotFoundException;
    import java.util.Scanner;
     
    public class Redvenice {
     
    	/**
    	 * JavaProgrammingForums.com
    	 */
     
    	// line in data file to find
    	public static String findMe = "javaprogrammingforums.com";
    	public static int count = 0;
     
    	public static void main(String[] args) {
    		readFile();
    	}
     
    	public static void readFile() {
     
    		// Location of file to read
    		File file = new File("data.txt");
     
    		try {
    			Scanner scanner = new Scanner(file);
    			while (scanner.hasNextLine()) {
    				String line = scanner.nextLine();
    				// System.out.println(line);
    				if (line.equals(findMe)) {
    					// increase number of times found
    					count++;
    					// update jtextfields here
    					System.out.println("FOUND - " + line);
    				}
    			}
    			System.out.println(findMe + " found " + count + " times");
    			scanner.close();
    		} catch (FileNotFoundException e) {
    			e.printStackTrace();
    		}
     
    	}
     
    }

    The output is this:

    FOUND - javaprogrammingforums.com
    FOUND - javaprogrammingforums.com
    javaprogrammingforums.com found 2 times
    I hope this helps solve your issues
    Please use [highlight=Java] code [/highlight] tags when posting your code.
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