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

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

Examples: 

Input : geeks for geeks
Output :
geeks->5
for->3
geeks->5

Approach:Here we have to find out number of words in a sentence and the corresponding character count of each word. 

• Here first we create an equivalent char array of given String.
• Now we iterate the char array using for loop. Inside for loop we declare a String with empty implementation.
• Whenever we found an alphabet we will perform concatenation of that alphabet with the String variable and increment the value of i.
• Now when i reaches to a space it will come out from the while loop and now String variable has the word which is previous of space.
• Now we will print the String variable with the length of the String.

Implementation:

JAVA

class CountCharacterInEachWords {
    static void count(String str)
    {
        // Create an char array of given String
        char[] ch = str.toCharArray();
        for (int i = 0; i < ch.length; i++) {

            // Declare an String with empty initialization
            String s = "";

            // When the character is not space
            while (i < ch.length && ch[i] != ' ') {

                // concat with the declared String
                s = s + ch[i];
                i++;
            }

            if (s.length() > 0)
                System.out.println(s + "->" + s.length());
        }
    }
    public static void main(String[] args)
    {
        String str = "geeks for geeks";
        count(str);
    }
}

Output

geeks->5
for->3
geeks->5

Time Complexity: O(|S|).
Auxiliary Space: O(|S|), where |S| is the length of the input string.

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