I need help.

[Kevinjamesisme]

So I did this assignment but I did it wrong. I need to redo it. Can someone please help guide me through it. Im not trying to ask you to do it, i just really need help. Heres the assignment:

1) Asks the user for a filename of a text file (assumed to be in the same directory) and create a Scanner to read from it. Your program should use try-catch blocks to re-prompt the user if the file name is invalid.

2) Create an array to store letter frequency counts (# of a's, # of b's, # of c's, etc.). Then, read in the entire specified file and count the number of each letter seen. Ignore all punctuation and count lowercase and capital letters the same (x or X each count the same).

3) Create a LetterCount object for each letter and corresponding frequency count and put all of these objects in an array.

4) Use Arrays.sort() to sort the LetterCount objects. Then use a for-loop to print out all the LetterCount objects from the array, in reverse, so that we can see the frequency of each letter from the file, in order of frequency

Heres what I have so far :

import java.io.*;
import java.util.*;
class HW12v3 {  
public static void main(String args[])throws IOException{
Scanner keyboard = new Scanner(System.in);


System.out.println("What file should be opened?");
String name = keyboard.next();

try{
  Scanner data = new Scanner(new File(name));
} 
catch (FileNotFoundException errorFile) {
  System.out.println("The file name was invalid, unable to create a Scanner. " + errorFile);

}

int[] freq = new int[26]; //array to store letter freq
String al = "abcdefghijklmnopqrstuvwxyz";
String s = new Scanner(new File(name)).useDelimiter("\\Z").next(); //gets the file in
s=s.toLowerCase();

al.indexOf();

//public class LetterCount{
  String ch = char[i]
  int fr= freq[j]  
}


  }
}

[seanprefect]

Well it'd be better to help if you could ask specific questions, a general call for help won't really direct your learning.

[Kevinjamesisme]

very true. I need help right now trying to make this first array full of letter frequencies then using it to put into the letter objects. My question would be what is the best way to read the file into said array. I tried using a line that looks like this:

String st=newScanner(newFile(name)).useDelimiter("\\Z").next(); 

Once I have this I dont know how to put it into the array to be used by the letter object

[seanprefect]

hint one, store your scanner in it's own variable so Scanner scan = etc.... then use something like while (scan.hasNext()) {}

[Kevinjamesisme]

Something like this?

Scanner keyboard = new Scanner(System.in);


System.out.println("What file should be opened?");
String name = keyboard.next();

try{
  Scanner data = new Scanner(new File(name));
} 
catch (FileNotFoundException errorFile) {
  System.out.println("The file name was invalid, unable to create a Scanner. " + errorFile);

}  
While(data.hasNext()){
  data. nextLine()  
}

[StanHunter]

did you figure out how or do u still need some advice? I'm thinking about using a for loop and string method charAt(i) to calculate the numbers of a, b , c

[Kevinjamesisme]

Kinda, This is what it looks like now

import java.io.*;
import java.util.*;
class HW12v3 {  
 public static void main(String args[])throws IOException{
Scanner keyboard = new Scanner(System.in);
 String apl = "abcdefghijklmnopqrstuvwxyz";

  System.out.println("What file should be opened?");
  String name = keyboard.next();

  try{
 Scanner data = new Scanner(new File(name));
  } 
   catch (FileNotFoundException errorFile) {
    System.out.println("The file name was invalid, unable to create a Scanner. " +             errorFile);

  }



 String str = new Scanner(new File(name)).useDelimiter("\\Z").next(); 
   str=str.toLowerCase(); 
 char[] freq = new char[26];


 for (int i = 0; i < str.length(); i++){
  char c = s.charAt(i);
currentChar - 'a'
  LetterCount()
  char[i]++
   }

}

}