update « text file « Java I/O Q&A

1. Updating a specific portion of a text file in java stackoverflow.com

In my program I need to update the Balance column of the text file each time the user does a withdrawal. I used both the write methods as well as the ...

2. Java : How can I get only update text from text file when it's updated stackoverflow.com

I have a text file (*.txt) . it's updated frequently. I need only update text from it when it's updated.

3. Update Text File coderanch.com

Hi all. I am using text file to store all my data's that are to be displayed in my jsp.I am reading my text file data using the below code. StringBuffer messageBuffer = new StringBuffer(""); InputStream inStream = Thread.currentThread().getContextClassLoader(). getResourceAsStream("DB.txt"); BufferedReader reader = new BufferedReader(new InputStreamReader(inStream)); String line = null; while((line = reader.readLine())!=null){ StringTokenizer tokenizer = new StringTokenizer(line,";"); insertLaneToDB(tokenizer,standard); } And ...

4. How to update and delete records in a text file? coderanch.com

Hi, I had a text file in which contains records line by line with ',' as delimiter as I use stringtokenizer and vector to read the data. The format in the text file likes: Name, Sex, Age. I want to add 2 functions: (1) update the record by name, sex or age; (2) delete the whole line of record; Do I ...

5. need simple example of updating a text file coderanch.com

I am reading an input file and updating one line. The way that I am trying is not working. I can read the input file and create the output file correctly, but I can't rename the output file to the input file's name. Here is my code: String userFile = getServletContext().getRealPath("/WEB-INF/users.txt"); getServletContext().log("user.txt full pathname is " + userFile ); int count ...

6. Updating a text file coderanch.com

7. Updating a text file java-forums.org

Hi everyone! I want to develop a program that writes a number to the file in an ordered manner. For example: I've got a file with the numbers 3 4 7 and I want to add 5. My program has to find its correct order and add it to the file. How can I achieve that? If possible give a source ...

8. reading and updating text file forums.oracle.com

while ((strLine = br.readLine()) != null) { // Print the content on the console int lne; lne = 0; for (int cnt=0; (cnt < 6 && strLine.trim().length() > cnt) ; cnt++, ++lne){ System.out.println ("First 5 Characters " + "lne is " + lne + " "+ strLine.charAt(cnt)); } System.out.println (strLine); strLine.replaceAll("", "#I21"); out.write(strLine); } //Close the input stream in.close(); out.flush(); out.close(); ...

9. update midle values of the text file... forums.oracle.com

hello all I can write to a NEW text file "myfile.txt" by using: BufferedWriter out = new BufferedWriter(new FileWriter("myfile.txt")); out.write(databaseName +"\n"); out.write(hostName +"\n"); out.write(portName +"\n"); out.write(userName +"\n"); out.write(pass +"\n"); ... out.write(value1 +"\n"); out.write(value2 +"\n"); ... Now supose that the file "myfile.txt" is already exited and I only want to write to midle of the file (e.g I want to update the ...

10. update text file forums.oracle.com

11. searching an updating text file for string forums.oracle.com

Is it okay to read/search an updating text file without using a lock? I am writing an application that listens to comm port, retrieves and saves the data from port and system time of d data in ms at every second to a text file (a separate thread...say Thread A). Another thread Thread B monitors an event. If the event occurs, ...

12. UPDATING AND DELETING DATA IN A TEXTFILE forums.oracle.com

I think there are ways to open a file for appending, and maybe using Random Access File you can remove / change certain parts of the file. But honestly these days file data throughput is very very high (certainly 100s of megabytes / sec, maybe gigabytes / sec), but file latency (the time it takes for the HD to get to ...

13. How to update a .txt or .ser file with Serialization forums.oracle.com

I'm working on a project and it requires me to save the informations of Users in a text File. The information includes so many fields so that I decide to use the Object Serialiable to write the information to File. Actually, if there's a new user register , The program will automatically write the informations( as object ) to a the ...