Removing a word from A text file

Question

I have a method to remove a word from a text file in list format of words but it keep deleting all the data in the file instead of the specific word

 public static void Option2Method() throws IOException 
 {
   File inputFile = new File("wordlist.txt");
   File tempFile = new File("TempWordlist.txt");

   BufferedReader reader = new BufferedReader(new FileReader(inputFile));
   BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));

   String lineToRemove = JOptionPane.showInputDialog(null, "Enter a word to remove");
   String currentLine;

   while((currentLine = reader.readLine()) != null)
 {
   String trimmedLine = currentLine.trim();
   if(trimmedLine.equals(lineToRemove)) continue;
   writer.write(currentLine);
 }
   boolean successful = tempFile.renameTo(inputFile);
 }

Answer 1

The code must call close() on the writer.

Make sure the data gets from the buffer to the actual file:

 while((currentLine = reader.readLine()) != null)
 {
   String trimmedLine = currentLine.trim();
   if(trimmedLine.equals(lineToRemove)) continue;
   writer.write(currentLine);
 }

 writer.close();
 reader.close();

Consider using try/catch/finally blocks to make sure the streams are closed even when an IOException is thrown.

Answer 2

Try this:

String str = "Sample Line";
String[] words = str.split(" "); 
for(i=0 to i>arr.length)
{
if(str.indexOf(arr[i])!=-1) //checks if the word is present...
str.replace(arr[i],""); //replace the stop word with a blank
space..
}

Or this way:

String yourwordline = "dgfhgdfdsgfl Sample dfhdkfl"; 
yourwordline.replaceAll("Sample",""); 

Answer 3

Try this:

public static void removeLineMethod(String lineToRemove) throws IOException {
   File inputFile = new File("wordlist.txt");
   File tempFile = new File("TempWordlist.txt");

   BufferedReader reader = new BufferedReader(new FileReader(inputFile));
   BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));
   String currentLine;

   while((currentLine = reader.readLine()) != null)
 {
   String trimmedLine = currentLine.trim();
   if(trimmedLine.equals(lineToRemove)) continue;
   writer.write(currentLine + "\n");
 }
   reader.close();
   writer.close();
   inputFile.delete();
   tempFile.renameTo(inputFile);
 }

if you do not delete the input file, your rename will fail, so close the streams, delete the input file, then rename the temp file.

Answer 4

File inputFile = new File("wordlist.txt");
       File tempFile = new File("TempWordlist.txt");

   BufferedReader reader = new BufferedReader(new FileReader(inputFile));
   BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));

   String lineToRemove = JOptionPane.showInputDialog(null, "Enter a word to remove");
   String currentLine;

 while((currentLine = reader.readLine()) != null)
 {
   String trimmedLine = currentLine.trim();
   if(trimmedLine.equals(lineToRemove)) continue;
   writer.write(currentLine);
   writer.newLine();
 }
   reader.close();
   writer.close();
   inputFile.delete();
   tempFile.renameTo(inputFile);
    }