Java program to count the characters in each word in a given sentence

To count the characters in each word in a given sentence, the Java code is as follows −

Example

import java.util.*;
public class Demo{
   static final int max_chars = 256;
   static void char_occurence(String my_str){
      int count[] = new int[max_chars];
      int str_len = my_str.length();
      for (int i = 0; i < str_len; i++)
         count[my_str.charAt(i)]++;
      char ch[] = new char[my_str.length()];
      for (int i = 0; i < str_len; i++){
         ch[i] = my_str.charAt(i);
         int find = 0;
         for (int j = 0; j <= i; j++){
            if (my_str.charAt(i) == ch[j])
               find++;
         }
         if (find == 1)
            System.out.println("The number of occurrence of " + my_str.charAt(i) + " is :" +
            count[my_str.charAt(i)]);
      }
   }
   public static void main(String[] args){
      Scanner my_scan = new Scanner(System.in);
      String my_str = "This is a sample";
      char_occurence(my_str);
   }
}

Output

The number of occurrence of T is :1
The number of occurrence of h is :1
The number of occurrence of i is :2
The number of occurrence of s is :3
The number of occurrence of is :3
The number of occurrence of a is :2
The number of occurrence of m is :1
The number of occurrence of p is :1
The number of occurrence of l is :1
The number of occurrence of e is :1

A class named Demo contains the function ‘char_occurence’ that iterates through the string and counts every character and assigns its count to the respective character in the count array. In the main function, a Scanner class object is created to read the input from the console. The function is called on string and the count of every character is displayed on the console.