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    [SOLVED] Re: File handling issue

    The problem is at this line.



    if (!inFile.delete()) {
    System.out.println("Could not delete file");
    }


    This is the line that deletes the original file in order for it to be...
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    [SOLVED] File handling issue

    I'm writing a program that dynamically updates an xml file as it is being edited. It needs an add function, delete, and save, and so far, I've gotten only the add function working properly. I've got...
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    Re: Run time error

    Yeah, no. No one should/is going to do your homework for you.
  4. Re: Having trouble working with Gregorian dates and object date

    Look up the Scanner class and/or JOptionPane
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    Re: File editing problem

    The -18 is the offset from the end of the file to put the addition inside the <channel> element.

    technically, this should work.



    this week will take place today from 3:15 to 4:15 in the...
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    Re: File editing problem

    All the changes are made at the bottom of the file.



    <rss xmlns:media="www.hardytechsolutions.com" version="2.0">
    <channel>
    <title>BMHS Daily Announcements</title>
    <link />...
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    Re: File editing problem

    Code to run




    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.IOException;
    import java.io.RandomAccessFile;
    import java.nio.channels.FileChannel;
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    Re: File editing problem

    2688

    Attached is a ZIP file containing all the files in the project, assuming you are using Eclipse, you can right click on the file manager in Eclipse and import the file system after you unzip...
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    Re: plz help me to do the program

    Firstly use the
    tags when posting code.

    Second, remember, a char is a number associated with a letter, if you convert the string to an array of chars, you can xor each letter using the ^...
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    Re: File editing problem

    No, it is not always a Z and it is always in the same location. There isn't anywhere in the code that a random letter like that should show up. Aside from the Item class, all code used in that method...
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    File editing problem

    I'm writing a program to dynamically update an xml file to add, delete, and edit entries in the file. I've run into an issue with the add method because when I write into the file, a random letter is...
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    Re: Using functions in a calculator

    OK, let's slow down here. Here's how I parse equations right now, minus functions and variables (why I'm here).

    1. Take an input expression
    2. Set up the equation for input into the parser
    ...
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    Re: Using functions in a calculator

    Norm, yes, at least, just the sin(2pi) part.
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    Re: Using functions in a calculator

    I know how to use the Math class and have used third party libraries in the past for mathematical purposes. My question is how to solve those functions inside of an expression, ie 3+sin(2pi)^(-3)....
  15. Re: Experiment gone wrong . . . exception in class

    You could've also moved the return statement outside of the try/catch block
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    Re: Cinema Seating arrangment

    If you know how to use arrays, then this problem becomes very, very simple.
  17. Re: Need help on jar file creation and usage

    What is the purpose of this jar file? Are there methods in the jar that you need somewhere else? Is the jar a part of a larger project?

    Also, this thread should be in java theory as this is not...
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    Using functions in a calculator

    I'm writing a calculator program for fun that takes an input from a user, via typed commands. So far, it works very well with basic ^*/+- arithmetic, however, I want to start adding functions, such...
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    Re: PEMDAS Calculator

    Yes, I still don't know what it does.
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    Re: PEMDAS Calculator

    That's not how my algorithm works... Care to elaborate?
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    PEMDAS Calculator

    I'm writing a calculator, and to start, I'm writing basic arithmetic functionality. I've figured out how to tackle the "EMDAS" portion of the Order of Ops, however, I don't have a clue on how to...
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    Re: Fibonacci sequence

    I'll give you a hint, here is the formula.

    An = An-1 + An-2

    Where A1 = 1 and A2 = 1.
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    Re: Factorial calculation optimization

    Problem 160 - Project Euler

    Problem 160. I've been working on it for a while. First attempt was to brute force the factorial using JScience's LargeInteger class and huge multi-threading. That took...
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    Re: Factorial calculation optimization

    Ok, well, you can use De Polignac's formula to figure out how many factors of a prime factor there are in n!.



    Could you also explain this a different way?



    This is a project Euler...
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    Factorial calculation optimization

    For a problem I'm working on, I need to calculate some very, very large factorials; or at least the first five non-zero digits of said factorial. I've worked out the function:

    F(n) =...
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