Question

Lab Text Manipulation

Inside the main method, do the following:

• Create an ArrayList of strings and call it parks.
• Read in the names of national parks from the user until the user enters done(or DONE,
  or dOnE, .. ) Keep in mind, that the names of some national parks consist of more than one word, for example, Mesa Verde.
  As you read in the national parks, add them to the list.
• Next, we are going to build a string based on the elements in the list parks. Since the text keeps changing as we add one park at a time, we use class StringBuilder for this task.
  • Use a StringBuilder called sb to create the string  nationalParks .
  • Loop through all the elements of the list  parks and add them one at a time.
    The resulting string should have the following format:
    Favorite National Parks: {park1} | {park2} | . . . | {parkN}
    The parks are separated by a space, a vertical bar, and another space. However, there is no vertical bar after the last element. {park1}, {park2}, {parkN} are the various list elements with updated spelling.
  • Create a private method to update the spelling.
    We can't control whether the user enters the park names in uppercase or lowercase letters. However, we can change the names to a spelling where all letters are lowercase except for the first letters of each individual word. In order to make those changes, create a private method called updateSpelling. It has the following method header:
    private static String updateSpelling(String text)
    E.g.: When you pass the string "MESA VERDE" the method returns "Mesa Verde"
    E.g.: When you pass "yEllOwstOnE" it returns "Yellowstone"
    E.g.: Passing "black canyon of the gunnison" returns "Black Canyon Of The Gunnison"
    E.g.: Passing "Denali" returns "Denali"
  • When you are done building the specified string in SringBuilder, print it.

The output depends on the information provided by the user.

Please enter your favorite National Park or DONE to stop: mesa verde
Please enter your favorite National Park or DONE to stop: black CANYON of ThE gunnisON
Please enter your favorite National Park or DONE to stop: DENALI
Please enter your favorite National Park or DONE to stop: yellowStone
Please enter your favorite National Park or DONE to stop: Done

Favorite National Parks: Mesa Verde | Black Canyon Of The Gunnison | Denali | Yellowstone

Answer 1

Screenshot

Program

import java.util.ArrayList;
import java.util.Scanner;

public class TextManipulator {

   public static void main(String[] args) {
       //Object to read user input
       Scanner sc=new Scanner(System.in);
       //Create an ArrayList of strings and call it parks
       ArrayList<String>parks=new ArrayList<String>();
       //Read in the names of national parks from the user until the user enters done
       String name="";
       System.out.print("Please enter your favorite National Park or DONE to stop: ");
       name=sc.nextLine();
       while(!name.equalsIgnoreCase("done")) {
           parks.add(name);
           System.out.print("Please enter your favorite National Park or DONE to stop: ");
           name=sc.nextLine();
       }
       System.out.println();
       //Create Text
       StringBuilder nationalParks=new StringBuilder();
       for (int i=0;i<parks.size()-1;i++)
       {
            nationalParks.append(parks.get(i));
            nationalParks.append(" | ");
       }
       nationalParks.append(parks.get(parks.size()-1));
       //Display Formatted text
       System.out.println("\nFavorite National Parks: "+updateSpelling(nationalParks.toString()));
      
   }
   //Method to change first letter of a word into capital and all others are small
   private static String updateSpelling(String text) {
       //For temporary storage
       StringBuilder s = new StringBuilder();
       //For check the starting point of a word
        char ch = ' ';
        //Loop through each character of the text
        for (int i = 0; i < text.length(); i++) {
            //If a character's previous charcter space and next is a character then change upeercase
           //Because it is starting letter of a word
            if (ch == ' ' && text.charAt(i) != ' ') {
               s.append(Character.toUpperCase(text.charAt(i)));
            }
            //Check other letters and change into lower case
            else if(Character.isLetter(text.charAt(i))) {
               s.append(Character.toLowerCase(text.charAt(i)));
            }
            //Other than letters
            else {
               s.append(text.charAt(i));  
            }
            //Keep track of prev character  
            ch =text.charAt(i);
        }
        //Return string
        return s.toString();
   }

}

------------------------------------------------------------

Output

Please enter your favorite National Park or DONE to stop: mesa verde
Please enter your favorite National Park or DONE to stop: black CANYON of ThE gunnisON
Please enter your favorite National Park or DONE to stop: DENALI
Please enter your favorite National Park or DONE to stop: yellowStone
Please enter your favorite National Park or DONE to stop: Done

Favorite National Parks: Mesa Verde | Black Canyon Of The Gunnison | Denali | Yellowstone