Modify the content of a file using Java

by

I would start with closing reader, and flushing writer:

public class FileReplace {
    List<String> lines = new ArrayList<String>();
    String line = null;

    public void  doIt() {
        try {
            File f1 = new File("d:/new folder/t1.htm");
            FileReader fr = new FileReader(f1);
            BufferedReader br = new BufferedReader(fr);
            while ((line = br.readLine()) != null) {
                if (line.contains("java"))
                    line = line.replace("java", " ");
                lines.add(line);
            }
            fr.close();
            br.close();

            FileWriter fw = new FileWriter(f1);
            BufferedWriter out = new BufferedWriter(fw);
            for(String s : lines)
                 out.write(s);
            out.flush();
            out.close();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    public static void main(String args[]) {
        FileReplace fr = new FileReplace();
        fr.doIt();
    }
}

More Related Contents:

  1. Java FileReader and FileWriter copy a textfile on another
  2. How to append text to an existing file in Java?
  3. How do I create a Java string from the contents of a file?
  4. How can I read a large text file line by line using Java?
  5. How do I check if a file exists in Java?
  6. Do I need to close() both FileReader and BufferedReader?
  7. Create a new line in Java’s FileWriter
  8. Getting “java.nio.file.AccessDeniedException” when trying to write to a folder
  9. java IO to copy one File to another
  10. GZIPInputStream reading line by line
  11. In Java, what is the default location for newly created files?
  12. How to read all files in a folder from Java?
  13. BufferedWriter not writing everything to its output file
  14. How to write a UTF-8 file with Java?
  15. How to read a file from a jar file?
  16. Is this the best way to rewrite the content of a file in Java?
  17. Is it necessary to close each nested OutputStream and Writer separately?
  18. Write a file in UTF-8 using FileWriter (Java)?
  19. How to tell why a file deletion fails in Java?
  20. java.security.AccessControlException: Access denied (java.io.FilePermission
  21. Fastest way to sum integers in text file
  22. Write I/O file to shared network drive using credentials
  23. Sending the same but modifed object over ObjectOutputStream
  24. Java Scanner doesn’t wait for user input [duplicate]
  25. Does BufferedReader.ready() method ensure that readLine() method does not return NULL?
  26. Difference between java.io.PrintWriter and java.io.BufferedWriter?
  27. Why does FileChannel.map take up to Integer.MAX_VALUE of data?
  28. First character of the reading from the text file :  [duplicate]
  29. Test if a file is an image file
  30. Difference between Files#delete(Path) and File#delete()

Leave a Comment