Coding Help Hashmap Java? I need a code ( IN JAVA) that uses a hashmap... that c

Question

Coding Help Hashmap Java?

I need a code ( IN JAVA)

that uses a hashmap... that counts the characters and in one method gives the characters alphabetically.

The other gives it in order of frequency( most frequent to least)

I can share what i have but i don't think its right

example:

Then, after the function call freqDistribution("essay.txt", "freq.txt"), a file called freq.txt should contain the following

b 1 c 1 h 1 n 2 o 4 r 1 w 4

After the function call ordered freqDistribution("essay.txt", "ordfreq.txt"), a file called ordfreq.txt should contain the following: o 4 w 4 n 2 b 1 c 1 h 1

Explanation / Answer

working code. compiled on ideone

/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
   public static void main (String[] args) throws java.lang.Exception
   {
             String str = "abc abc abc 123";
     Hashtable numbers = new Hashtable();
     int size = str.length();
     for(int i = 0 ; i< size ; i++)
     {
         char curr = str.charAt(i);
         if(numbers.contains(curr) == false)
         {
             numbers.put(curr, 1);
         }
         else
         {
             numbers.put(curr, ((int)numbers.get(curr)) + 1);
         }
     }

     Enumeration names = numbers.keys();
     char c;

     while(names.hasMoreElements()) {
        c = (char) names.nextElement();
        System.out.println(c + ": " +
        numbers.get(c));
     }
   }
}

https://ideone.com/hnkh27

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