Detect « Operation « Java I/O Q&A

1. How do I detect whether the file system is case-sensitive?    stackoverflow.com

I have a List<String> of file names from a folder and a certain file name as String. I want to detect whether the file name is in the list, but need ...

2. How to detect filesystem has changed in java    stackoverflow.com

I would like to know how to efficiently implement filesystem changes in java? Say I got a file in a folder and modify that file. I would like to be notified ...

3. Detecting and handling third-party library filehandle leaks in Java    stackoverflow.com

Is there any way to detect and handle whether a Java library is correctly releasing file-handles (via "close") from within a Java program that is using said library, short of having ...

4. how to detect WebPage charset,and get page content?    stackoverflow.com

i use follows code to get page content:

URL url=new URL("http://www.google.com.hk/intl/zh-CN/privacy.html");
BufferedReader reader = new BufferedReader(new InputStreamReader(url.openConnection().getInputStream()));
for(String line=reader.readLine();line!=null;line=reader.readLine()){
    System.out.println(line);
}
reader.close();

5. Detecting RollOver files in Java    stackoverflow.com

I am listening changes to a syslog file in Java. I use the accepted answer to process new entries to the file. However, I couldnt find an efficient solution for ...

6. Tools to detect Memory leaks to a certain extent in reasonable timeframe    stackoverflow.com

Am looking for tools to detect Memory Leaks, File open issues in Java based applications written using Netbeans and deployed on Tomcat 6 without having to spend hours, something which can ...

7. how to detect end of file in java    bytes.com

i have a text file and i have to print all values using file io system.. can you tell me how to check end of file.. thanks in advance. All methods ...

8. Detecting Applications running on PC    coderanch.com

9. Detecting EOF    coderanch.com

Hi, I'm writing a csv text file parser. The parser is fine but determining when I've reached the end of the file has proved to be a pain. Take the following code: // Get a reader for the csv file try { r = new FileReader(ipFile); // ipFile is a File object } catch (java.io.FileNotFoundException fnfe) { // error handling code ...

10. How to Detect CD-ROM from listRoots()    coderanch.com

I am getting all the roots from client ,I want to search a file on client machine ,I can skip A:\ & B:\ but how can I find CD_ROM root ,that also I want to skip , problem is many times CD_ROM drive is not fixed as E:\ ,F:\ or anything else ,how can I fing it .I can create object ...

11. how to detect the file type    coderanch.com

I am reading a text file, which can contain either english text, or thai text or a combination of thai and text file. I have wrote following code for reading thai chars from text file FileInputStream fis = new FileInputStream ( "/temp/TYPE1TH.txt") ; int availableBytes = fis.available(); byte bArr[] = new byte[availableBytes]; int readBytes = fis.read ( bArr ) ; fis.close(); ...

12. auto detect CDRom    coderanch.com

"auto detect" a CD means something a little different. When you insert a disk and a program on it starts up, that's "auto detect". You just want to find a disk and read it. Java doesn't have a way to distinguish the CD from any of the other drives on a system (which can be had through the java.io.File listRoots() method). ...

13. Detecting when a file is renamed    coderanch.com

Hello all, I am developing a File Monitoring component. Currently, the component can detect when a File object (system file or directory) has changed in someway, by using the lastModified() method of the File object. Now, I want to extend the functionality of the component, and identify exactly what changed. I'm running into problems detecting a file that is renamed. When ...

14. how to detect end of file    coderanch.com

hi all, the code below only reads from halfway through the file, and at the end it throws an EOFException. i thought that "while (os.readObject() != null)" would prevent this, but apparently i need to use something else. can someone help? thanks. load.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { try { FileInputStream in = new FileInputStream("test.txt"); ObjectInputStream os = new ...

15. Detecting end of file transmission    coderanch.com

Hello, is there a way to detect when a file is fully transmitted? The project I am working on expects to recieve a fixed number of large files a day. The app should not start processing until the last file is fully transmitted. Will the File exist() method return true for partially received files? thanks in advance Jim C

16. How to detect a file is existing or not?    coderanch.com

I know I can use File file=new File("****.***"); if(file.exists()) do... else do.... but I want to use jsp include tag to detect a file is exist or not. currently, if a file (***.html) exist, then jsp include it and show up, if a file(***.html) does not exist, then jsp include nothing, and no exception. So I want to find some way, ...

17. How to detect a config file when using a shell script to start the app    coderanch.com

Hello, I devoloped an application and made an jar file. To configure the app there exists an config file. I placed the config file in the directory "conf". The jar file lives beside the conf directory. So I have the following files. application.jar conf/config.xml The application should always find the config file in the directory "config" which is in the same ...

18. Detecting linebreaks in files    coderanch.com

Hi everyone! I would like to make a program, which manipulates some files(writing stuff in). For that the best is, if i read characters in instead of lines. Anyone knows how i can detect if my character read in was a linebreak(OS free if possible)? My codepiece so far: int c; while( ( c = in.read( ) ) != -1 ) ...

19. duplicate file detection on hard-disk by java    coderanch.com

20. Detecting power cable unplug?    coderanch.com

Hi Does anybody know if there is a way to detect when a laptop / netbook has been connected / disconnected from AC power? (In Win XP). I'm working on a little project to use a netbook in my car with a touch screen and I'm powering the netbook from the cigarette lighter via an adapter. I want the program to ...

21. Detect fileupload completion?    coderanch.com

Hi, We have an app which lifts files uploaded by users over FTP and processes them before loading them into a DB. Currently we ask the users to upload all their files and then once they are complete upload an empty file called CONTROL_FILE. Our code looks for this CONTROL_FILE and only starts processing once it is present. It works, but ...

22. how we can detect end of file from readChar() method    coderanch.com

You can't. Well, not directly. Most of the reading methods from DataInputStream assume there are enough bytes available to return the data. The only differences are read(), read(byte[]), read(byte[], int, int) and readLine(). The first three return -1 when there is no data, the latter returns null. Now I said not directly. That's because all the other methods throw an EOFException ...

23. Detecting File Type    forums.oracle.com

The only way to determine for sure that a given file is, for example, a valid PDF file, is to try to read the entire file into a PDF parser. On Windows, the convention is that the file type is indicated by the file extension, but there are no guarantees. I can rename a Word doc to .txt, and it's still ...

24. Detect if file is local    forums.oracle.com

Hi there, I need to be able to determine whether a file is located on the local drives or if it's stored remotely. My first attempt was to get a list of all the drives using File.listRoots and then find out their types using FileSystemView.getFileSystemView().getSystemTypeDescription Once that done, I just needed to compare the file's absolute path and the local drives's ...

25. This iznt working for some strange reason. (not detecting file..)    forums.oracle.com

26. How to detect Unicode-encoded file if it has no BOM?    forums.oracle.com

Let me explain. Suppose I have a text file, but don't know its encoding. I check the BOM, it's not found. Is there any way to determine what encoding it is? It could be a UTF-8 or UTF-16 file that does not contain BOM. I just need to find out some way to determine the encoding, Thanks in advance for your ...

27. Detecting File    forums.oracle.com

28. Detect DTMF from RTP packets playing streamed AU files    forums.oracle.com

Hello, Thank you for taking time to read this. I am needing to know the best way to go about this. On one end, I have an RTP client sending the RTP server on the other end a streaming AU sound file. However, I need to be able to measure it somehow, so that I can determine which number was pressed ...