count string letters in jav code example

Example 1: java count frequency of characters in a string

public class Frequency   
{  
     public static void main(String[] args) {  
        String str = "picture perfect";  
        int[] freq = new int[str.length()];  
        int i, j;  
          
        //Converts given string into character array  
        char string[] = str.toCharArray();  
          
        for(i = 0; i <str.length(); i++) {  
            freq[i] = 1;  
            for(j = i+1; j <str.length(); j++) {  
                if(string[i] == string[j]) {  
                    freq[i]++;             
                    //Set string[j] to 0 to avoid printing visited character  
                    string[j] = '0';  
                }  
            }  
        }  
        //Displays the each character and their corresponding frequency  
        System.out.println("Characters and their corresponding frequencies");  
        for(i = 0; i <freq.length; i++) {  
            if(string[i] != ' ' && string[i] != '0')  
                System.out.println(string[i] + "-" + freq[i]);  
        }  
    }  
}

Example 2: How do you count characters in a string array in Java?

package practical5;

import java.util.Arrays;

public class Part1_9 {

public static void main(String[] args) {

    // declaring and populating array
    String quoteArray[] = { "\"Continuous", "effort", "not", "strength",
            "nor", "intelligence", "is", "the", "key", "to", "unlocking",
            "our", "potential.\"\n" };

    // for loop to print full array
    for (int counter = 0; counter < quoteArray.length; counter++) {
        System.out.print(quoteArray[counter] + " ");
    }// end of for loop

    // Printing array using Enhanced for/ for each loop (Different way to
    // print array)
    for (String element : quoteArray) {
        System.out.print(element + " ");
    }// end of enhanced for

    // line break
    System.out.println();

    // printing number of words in array
    System.out.println("Number of words in array: " + quoteArray.length);

    **// printing total number of letters in array**
    for (int counter = 0; counter < quoteArray.length; counter++) {
        String letters = new String(quoteArray[counter]);
    }

    // printing the smallest word

    // printing the biggest word

}// end of main

}// end of class