Sorry about this

I know this doesn't pertain to Bukkit API. But I was wondering how to write lines to a file without erasing the already there text. I'm relatively new to Java, thanks.

 

How would you normally write to a file? I know that you can just dump all the file's information to a string/array, edit what you need to, then dump it back to the file. This would be my method of choice, as it only writes to the file twice!

 

You could use code like this:

Code:

FileOutputStream out = null;
PrintStream printer = null;
try {
    // The 'true' means append to the file.
    out = new FileOutputStream(filename, true);

    // We need to wrap the FileOutputStream in
    // a PrintStream to print text to a file.
    // The 'true' means to flush automatically.
    printer = new PrintStream(out, true);

    // Print stuff to the file.
    printer.println("Hello, world!");
} catch (IOException ex) {
    // Handle IO errors here.
} finally {
    // Closing the print stream takes some work.
    try {
        if (printer != null) printer.close();
    } catch (IOException ex) {
        // Ignore or log a warning message.
    }
    // Closing the output stream takes some work.
    try {
        if (out != null) out.close();
    } catch (IOException ex) {
        // Ignore or log a warning message.
    }
}

 

Get the File object of what you want to write, create a writer from it (Writer w = new FileWriter(yourFile)). Use w.append("TextHere"). Don't forget to use w.close() after you're done . Pretty sure this will do it.

 

Regarding the FileWriter class:

Code:

// Need to pass true to append to a file.
FileWriter w = new FileWriter(filename, true);

The FileWriter class provides methods for writing string and character data. To write more interesting information to your file, you might prefer to wrap your FileWriter in an instance of the PrintWriter class. Ultimately, PrintWriter is to FileWriter what PrintStream is to FileOutputStream.