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Thread: Please help me

  1. #1
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    Default Please help me

    Question:
    Write a Java program Format.java, to read a passage from an input file passage.txt and
    print to another file newPassage.txt the same passage with the following changes:
     Each sentence should be printed on a new line.
     All numbers should be removed.
    The program should also keep track of and print (to the same file) how many times each
    vowel appears.


    My solution that doesn't work :
    Last edited by Java girl; April 13th, 2014 at 04:10 PM.

  2. #2
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    Default Reading and Writing from files-PLEASE HELP ME

    Question:
    Write a Java program Format.java, to read a passage from an input file passage.txt and
    print to another file newPassage.txt the same passage with the following changes:
     Each sentence should be printed on a new line.
     All numbers should be removed.
    The program should also keep track of and print (to the same file) how many times each
    vowel appears.


    My solution that doesn't work :
    Last edited by Java girl; April 13th, 2014 at 04:09 PM.

  3. #3
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    Default Re: Please help me

    Please edit your post and wrap your code with code tags:
    [code=java]
    YOUR CODE HERE
    [/code]
    to get highlighting and preserve formatting.

    doesn't work
    Please explain and be specific about each of the problems.

    One thing I see:
    In binary conditions made up of several sub conditions connected by OR operators, if any ONE sub condition is true, the whole condition is considered true.
    With AND operators ALL the sub conditions must be true for the whole condition to be true.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Please help me

    Question:
    Write a Java program Format.java, to read a passage from an input file passage.txt and
    print to another file newPassage.txt the same passage with the following changes:
     Each sentence should be printed on a new line.
     All numbers should be removed.
    The program should also keep track of and print (to the same file) how many times each
    vowel appears.


    My solution that doesn't work : nothing outputs to the newPassage file

     
    Last edited by Java girl; April 13th, 2014 at 04:09 PM.

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    Default Re: Please help me

    The code has lost all of its indentations and needs to be formatted.

    Where does the code write anything to a file?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Please help me

    What happens when the code executes? Does it exit normally?

    One problem I see is the while() loop. Where is the value of the variable that controls the looping changed INSIDE of the loop? If it never changes the loop won't exit.

    Why is a while used there instead of an if?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Please help me

    When it executes, each sentence should be printed on a new line an digits removed. Also, the number of times each vowel appeared. All this should be outputted to the newPassage file.

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    Default Re: Please help me

    Did you see my last post? I asked several questions that you seemed to have skipped answering any of them.

    I'm done for tonight. Back tomorrow.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Please help me

    The while loop inside was changed because I was uncertain. When I run the program the newPassage file stays blank.
    Ok, no problem, thanks for the assistance.

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    Default HELP required plz

    Create a Java method nextLarger that accepts two positive integer parameters num and n
    and returns the smallest digit within num that is larger than n. For example if num = 3875
    and n = 6, your method should return 7. Write a Java program Numbers.java to test the
    method.

    That was the given question, can someone help with the logic of getting the solution please, I attempted but was unsuccessful.

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    Default Re: HELP required plz

    first, arrange your num in ascending order. if num = 3875 it will be num = 3578 after sorting.,
    next start from the lowest, get the number that is higher than n.

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    Default Re: HELP required plz

    Thanks, goin to attempt it now. Back in a 10 mins.

    --- Update ---

    hi, i know how to put numbers in ascending number but not how to put digits in a number in ascending order.

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    Default Re: HELP required plz

    okay, do you know array?
    you can create an array of integer, array of characters will do also.
    then use the toCharArray method of String to store it in your array.
    then sort it.

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    Default Re: HELP required plz

    ok, back with an attempt in 10 mins

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    Default Re: HELP required plz

    you better paste your code when you back so we can assist you.

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    Default Re: HELP required plz

    Here is my attempt:

     


    --- Update ---

    Is anyone there?
    Last edited by Java girl; April 13th, 2014 at 04:10 PM.

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    Default Re: HELP required plz

    int numDigits[] = new int [];
    that is invalid declaration. you must put a length on that
    Example: int numDigits[] = new int[5];
    in your case, you can use the .length() method of String. new int[num.length()]

    base on your code, I think it would be better not to use the toCharArray() method, instead we will use the charAt() method.
    and we will put that on the int array
    Example:
    numDigits[i] = ((int) num.charAt(i)) - 48;

    as you noticed, I used the (int) to cast the character to integer and subtract 48 to convert in number.

    if you a little confused with that algorithm. you can use this
    numDigits[i] = Integer.parseInt(Character.toString(num.chartAt(i) ));
    parsing the character to string and then to integer.

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    Default Re: HELP required plz

     

    I am a total beginner at this so plz forgive if my corrections that i am resubmitting now based on what i interpreted is inaccurate. Make the corrections within the code if u can.
    Last edited by Java girl; April 13th, 2014 at 04:10 PM.

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    Default Re: HELP required plz

    there's a lot of errors in your code.
    okay let's fix 1 by 1.
    delete this line first:
    Arrays.sort(numDgits []);
    int i = num; --you already define the variable i in the loop.
    char[] chars = ("" + i).toCharArray();
    System.out.printf (%c,numDigits.charAt(i);

    if(numDigits.charAt(i) >n)
    {
    System.out.printf ("%c",numDigits.charAt(i));
    }

    delete those lines please and paste your new code

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    Default Re: HELP required plz

    public static int nextLarger (int num, int  n){
         int numDigits[] = new int [num.length()];
     
         for(int i=0; i<num.length();i++){
     
    	numDigits[i] = ((int) num.charAt(i)) - 48;
     
         }
    }

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    Default Re: HELP required plz

    Oh my! ahaha.. Sorry, I did not noticed that the parameter is int. apology.
    in your defining the length of array, num.length is invalid syntax. You must parse it first to string.
    Integer.toString(num).length() sorry..
    since you started with array. let just continue that.
    first create a String and declare its value as the String value of num Integer.toString(num)

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    Default Re: HELP required plz

    Miss posted in the group to not use arrays, now checked it lol so now i cant use arrays until she has taught us it well enough. Without arrays what would the code be instead.

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    Default Re: HELP required plz

    Okay, its fine not to use array, it would be easier for you not to use that.
    let us start from scratch is it okay with you?
    you have this method right?
    public static int nextLarger (int num, int  n){
     
    }
    let us fill that method with codes.

    we just need to determine the smallest digit in num that is larger than n,
    then we are to need a variable of int, and we are going to put the answer in that int variable.
    next I assumed that you already know how to use if statements, a conditional statement and loop.

    there are many solutions, is it okay to use while loop in your class? did your teacher taught it already?

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    Default Re: HELP required plz

    yes we did while and if loops

    --- Update ---

    Yes we can start from scratch, hope we figure it out soon, eyes getting tired lol

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    Default Re: HELP required plz

    Oh my ahaha.
    then create a while loop whose condition is num not equal to zero. what is time now in your country? ahaha

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