Question

In the first task, you will write a Java program that accepts a string of the format specified next and calculate the answer based on the user input. The input string should be of the format dddxxdddxx*, where d represents a digit and x represents any character and asterisk at the end represents that the string can have any number of characters at the end.

1. Prompt the user to enter a string with the specific format (dddxxdddxx*)

2. Read the user input as a String

3. The user input will contain two numbers. The first number will start at index 0 and has three digits and the second number will start at the index 5 and has three digits.

4. Extract the two numbers using the substring method available in String class. This will give you two Strings that contain numbers.

5. Covert the two Strings obtained in the last step to integers using the parseInt method in the Integer class.

6. Add the two numbers in the user input and divide the result by the length of the input string.

7. Output the result including the fractional part of the answer.

For example, if the user input is “1203x020e45A5524” then the two number strings will be “120” and “020”. The sum should be 140 and the answer displayed should be 8.75 (140/16).

”. Prompt the user to enter a string in the given format, read the input, process it and show the answer. A possible dialogue could be:

Please enter a String with two three-digit numbers at the beginning and at the index 5 (first three characters and characters from 6 to 8 must be numbers, for example 123ab678as343fdfd): 200w42444wffdf23t4e5

The answer is: 22.2 (444/20)

Answer 1

public class StringManip

{

       public static void main(String[] args) {

      

             Scanner scan = new Scanner(System.in);

             String userInput;

             // input of string in the format (dddxxdddxx*)

             System.out.print("Please enter a String with two three-digit numbers at the beginning and at the index 5 (first three\ncharacters and characters from 6 to 8 must be numbers, for example 123ab678as343fdfd): ");

             userInput = scan.next();

            

             int num, den;

             // get the first 3-digit number that will start at index 0

             num = Integer.parseInt(userInput.substring(0, 3));

             // get the second 3-digit number that will start at index 5

             den = Integer.parseInt(userInput.substring(5,8));

            

             // calculate the result by dividing the sum of the above two numbers with the length of the string

             double result = ((double)(num+den))/userInput.length();

             // display the result

             System.out.println("The answer is "+result+" ("+(num+den)+"/"+userInput.length()+")");

                             

             scan.close();

          }

}

//end of program

Output: