Searching through a folder and checking all files for text inside.
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Thread: Searching through a folder and checking all files for text inside.

  1. #1
    Join Date
    May 2011
    Posts
    1

    Angry Searching through a folder and checking all files for text inside.

    I am new to java and I am having a problem with some code. I am trying to create a java GUI whereby users enter a piece of text to search and a folder to search. The code will then search iteratively through each file for the text and append the results in a jtextarea. My search works for just one file if I exclude the loop through the files. When looping it does not produce any errors but I receive no output. My code is:

    Code:
    
    package searchfile;
     
    import java.io.*;
    import javax.swing.*;
    import java.nio.ByteBuffer;
    import java.nio.CharBuffer;
    import java.nio.channels.FileChannel;
    import java.nio.charset.Charset;
    import java.util.regex.Matcher;
    import java.util.regex.Pattern;
    import java.text.DateFormat;
    import java.util.Date;
    import java.util.ArrayList;
    import java.util.List;
     
    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { 
    //Runs the method to search through the files in a folder, this does not work yet!
    DoSearchFolder();
    } 
     
    /*Method to search iteratively through a folder and check all files for
    text search criteria - This is not working but yet produces no errors!
    */
    public void DoSearchFolder(){
     
    try {
     
    /*This bit appears to work as I get the message if the directory
    does not exist */
    File folder = new File(fileLocation.getText());
    String[] directory = folder.list();
    if (directory == null){
    JOptionPane.showMessageDialog(null, "This is not a directory or the directory does not exist");
    } else {
    /*From hear is where the problems seems to be, if only I got 
    errors! */
    for (int i=0; i<directory.length; i++){
    String listFilenames = directory[i];
     
     
    Pattern pattern =
    Pattern.compile(searchText.getText());
     
    Matcher matcher =
    pattern.matcher(fromFile(listFilenames));
     
    boolean found = false;
     
    while (matcher.find()) {
    String group = matcher.group();
    int start = matcher.start();
    int end = matcher.end();
    String endMatch = Integer.toString(end);
    String startMatch = Integer.toString(start);
     
    outputScreen.append("I found the text " + group + " starting at character " + startMatch + " and ending at character " + endMatch + " " + "from file " + listFilenames);
     
    found = true;
     
     
    }
     
    if(!found){
     
    JOptionPane.showMessageDialog(null, "No Match Found");
     
    }}}
     
     
    } catch (IOException e) {
     
    }}
     
    } 
    I have only included the code I am having
    I have only included the code I am having issues with and removed the rest. Any help would be greatly appreciated.

  2. #2
    dlorde is offline Elite Member Power Poster
    Join Date
    Aug 1999
    Location
    UK
    Posts
    10,163

    Re: Searching through a folder and checking all files for text inside.

    Most of us will generally move on rather than try to figure out unformatted code - indentations are important. An SSCCE is also helpful in these cases.

    Don't you hate code that's not properly indented? Making it [indenting] part of the syntax guarantees that all code is properly indented...
    G. van Rossum(designer of the Python)
    Last edited by dlorde; May 2nd, 2011 at 08:10 PM.
    Please use &#91;CODE]...your code here...&#91;/CODE] tags when posting code. If you get an error, please post the full error message and stack trace, if present.

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