Question

(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

Answer 1

import java.util.Scanner;

public class ParseStrings {
   
   public static void main(String[] args) {
      
      Scanner scnr = new Scanner(System.in);
      String lineString = "";
      int commaLocation = 0;
      String firstWord = "";
      String secondWord = "";
      boolean inputDone = false;
      
      while (!inputDone) {
         
         System.out.println("Enter input string:");
         lineString = scnr.nextLine();
         
         if (lineString.equals("q")) {
            
            inputDone = true;
            
         }
         
         else if (!lineString.contains(",")) {
            
            System.out.println("Error: No comma in string.\n");
            continue;
            
         }
         
         else {
            
            commaLocation = lineString.indexOf(',');
            firstWord = lineString.substring(0, commaLocation);
            secondWord = lineString.substring(commaLocation + 1, lineString.length());
            
            firstWord = firstWord.trim().replaceAll(" +", " ");
            secondWord = secondWord.trim().replaceAll(" +", " ");
            
            System.out.println("First word: " + firstWord);
            System.out.println("Second word: " + secondWord);
            System.out.println();
            
         }
         
      }
      
      return;
      
   }
   
}