Question

6.6 Parsing strings (Java)

(1) Prompt the user for a string that contains two strings separated by a comma. (1 pt)

• Examples of strings that can be accepted:
• Jill, Allen
• Jill , Allen
• Jill,Allen

Ex:

Enter input string: Jill, Allen

(2) Report an error if the input string does not contain a comma. Continue to prompt until a valid string is entered. Note: If the input contains a comma, then assume that the input also contains two strings. (2 pts)

Ex:

Enter input string: Jill Allen

Error: No comma in string

Enter input string: Jill, Allen

(3) Extract the two words from the input string and remove any spaces. Store the strings in two separate variables and output the strings. (2 pts)

Ex:

Enter input string: Jill, Allen

First word: Jill

Second word: Allen

(4) Using a loop, extend the program to handle multiple lines of input. Continue until the user enters q to quit. (2 pts)

Ex:

Enter input string: Jill, Allen

First word: Jill

Second word: Allen

Enter input string: Golden , Monkey

First word: Golden

Second word: Monkey

Enter input string: Washington,DC

First word: Washington

Second word: DC

Enter input string: q

********must use this as part of the solution:

import java.util.Scanner;

public class ParseStrings {

   public static void main(String[] args) {

/* Type your code here. */

Scanner scnr = new Scanner(System.in);

String lineString = "";

String firstName;

String lastName;

boolean inputDone;

System.out.println("Enter input string: ");

lineString = scnr.nextLine();

while (lineString.indexOf(',') == -1){

   System.out.println("Error: No comma in string");

   System.out.println("Enter input string: ");

   lineString = scnr.nextLine();

inSS = new Scanner(userInfo);

      // Parse name and age values from string
      firstName = inSS.next();
      lastName = inSS.next();

}

      return;

   }

Answer 1

In case of any query do comment. Please rate answer as well. Thanks

Code:

import java.util.Scanner;

public class ParseStrings {

   public static void main(String[] args) {

/* Type your code here. */

Scanner scnr = new Scanner(System.in);

String lineString = "";

String firstName;

String lastName;

String[] names;

//infinite loop to ask till enter q

while(true)

{

System.out.print("Enter input string: ");

lineString = scnr.nextLine();

//if q is entered then exit

if (lineString.charAt(0) == 'q')

    break;

//if comma is present then process it otherwise ask till comma is not entered

while (lineString.indexOf(',') == -1){

   System.out.println("Error: No comma in string");

   System.out.print("Enter input string: ");

   lineString = scnr.nextLine();

    }

   

    // Parse first name and last values from string

    names = lineString.split(",");

    firstName = names[0].trim();

    lastName = names[1].trim();

    //display the First and last name

    System.out.println("First word: " + firstName);

    System.out.println("Second word: " + lastName);

}

    return;

   }

}

==============Screen shot of the code===

Output: