Java Programming in Netbeans Write a program class that has two subroutines and

Question

Java Programming in Netbeans

Write a program class that has two subroutines and a main routine. The program should be a part of the “firstsubroutines” class and you should name your project firstsubroutines .

Your program must prompt the user to enter a string. The program must then test the string entered by the user to determine whether it is a palindrome. A palindrome is a string that reads the same backwards and forwards, such as "radar", "racecar", and "able was I ere I saw elba". It is customary to ignore spaces, punctuation, and capitalization when looking for palindromes. For example, "A man, a plan, a canal. Panama!" is considered to be a palindrome.

To determine whether a string is a palindrome, you can: convert the string to lower case; remove any non-letter characters from the string; and compare the resulting string with the reverse of the same string. If they are equal, then the original string is considered to be a palindrome.

Here’s the code for computing the reverse of str:

String reverse;

int i;

reverse = "";

for (i = str.length() - 1; i >= 0; i--) {

        reverse = reverse + str.charAt(i);

}

Write a static subroutine that finds the reverse of a string. The subroutine should have one parameter of type String and a return value of type String.

You must also write a second subroutine that takes a String as a parameter and returns a String. This subroutine should make a new string that is a copy of the parameter string, except that all the non-letters have been omitted. The new string should be returned as the value of the subroutine. You can tell that a character, ch is a lower-case letter by testing if (ch >= 'a' && ch <= 'z')

(Note that for the operation of converting str to lower case, you can simply use the built-in toLowerCase subroutine by saying: str = str.toLowerCase();)

You should write a descriptive comment before each subroutine, saying what it does.

Finally, write a main() routine that will read in a string from the user and determine whether or not it is a palindrome. The main routine should use The program should print the string converted to lower case and stripped of any non-letter characters. Then it should print the reverse string. Finally, it should say whether the string is a palindrome. (Use the two subroutines to process the user's string.) For example, if the user's input is "Hello World!", then the output might be:

Explanation / Answer

Please let me know in case of any issue.

import java.util.Scanner;

public class Palindrome {

   public static String getReverse(String str){

       String reverse = "";

       str = str.toLowerCase();

       for (int i = str.length() - 1; i >= 0; i--) {

           if(str.charAt(i) >= 'a' && str.charAt(i) <= 'z')

                   reverse = reverse + str.charAt(i);

       }

       return reverse;

   }

   public static String getStripped(String str){

       String res = "";

       str = str.toLowerCase();

       for (int i = 0 ; i <= str.length() - 1; i++) {

           if(str.charAt(i) >= 'a' && str.charAt(i) <= 'z')

                   res = res + str.charAt(i);

       }

       return res;

   }

   public static void main(String[] args) {

       Scanner sc = new Scanner(System.in);

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

       String str = sc.nextLine();

       String res = getStripped(str);

       String reverse = getReverse(str);

       if(res.equals(reverse))

           System.out.println("This IS a palindrome.");

       else

           System.out.println("This IS NOT a palindrome.");

   }

}

/*

Sample run:

Enter a string: Campus motto: Bottoms up, Mac!

This IS a palindrome.

*/

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