Answer to Question #305729 in Java | JSP | JSF for gunna_b

Question

Control Structures: As a build up from the previous question, consider 3 possible scenario of input : A character, number or word. You program should the do the following: In case the input is a character it should indicate if it’s a vowel or not, when a number is entered then it’s should check if it’s a prime and finally if a word is entered the system should check if it’s a palindrome or not. Sample Run1 Sample Run3 Enter a character, number or word: c Enter a character, number or word: 7 Output1: C is not a vowel Output3: 7 is a prime number Sample Run2 Enter a character, number or word: programming Output2: Programming is not a palindrome

Answer 1

import java.util.Scanner;


import java.math.*;


import java.io.*; 


import java.util.*;


import java.lang.StringBuilder;






public class MyTask{


  public static void main(String args[]) {


    // read keyboard input
     Scanner scanner = new Scanner(System.in);
     String s = scanner.nextLine();


    // check for vowels
    if(s.matches("[aeiouy]")){


     


      System.out.println("it’s a vowel");


     
    //  check for number
    }else if(s.matches("\\d+")){


       


        int number = Integer.parseInt(s);


        BigInteger primeNumber = BigInteger.valueOf(number);
        
        //  check for prime number


        boolean boolPrimeNumber = primeNumber.isProbablePrime((int) Math.log(number));


         
         
        if(boolPrimeNumber){


          System.out.println("it’s a prime");


        }else{


          System.out.println("it’s not a prime");


        }


    //  check for word
    }else if(s.length() > 1){


       //  reverse word then compare without upper case
      int palindromNumber = s.compareToIgnoreCase(new StringBuilder(s).reverse().toString());


       
    //  check for palindrome from result
      if(palindromNumber == 0){


        System.out.println("It's a palindrome");


      }else{


        System.out.println("It's not a palindrome");


      }


       


    }else{


      System.out.println("it’s not a vowel");


    }


      


  }


}