Question

JAVA

Write a public class call FunnyWord.

class FunnyWord must have a main method.

what it does:

0. prompt user for a String
1. read a String from the user
2. print whether the String is funny or not
3. continue until user enters the word "end"

The String is funny if it looks the same read from left to right or
right to left.

In order to pass all tests you must find funny phrases when spaces,
punctuation and case are ignored (look at the examples).

HINT: you could use the method replaceAll from String in order to
delete all the punctuation marks.

For example:

str.replaceAll(";", "");

returns a string where all semicolons have been replaced by nothing.

or you could use
str.replaceAll("\\W","")
which replaces all punctuation marks

you may also need other methods of String:

toLowerCase(): returns another String in lower case
length(): gives you the length of the String

you can build a String character by character this way:

char c;
String rr;

rr = rr + c; //adds the c at the end of rr

here is a piece of code that uses some of these methods:

public class Traverse{
    
    public static void main(String [] aaa){
        
        String ss = "x y z a b.?/;:'[{]} c  defgh";
        ss = ss.replaceAll("\\W","");
        String new1 = "";
        String new2 = "";
        
        for (int i = 0; i < ss.length(); i++){
            new1 = new1 + ss.charAt(i);
            new2 = ss.charAt(i) + new2;
        }
        System.out.println(new1);
        System.out.println(new2);
        
    }
}

Notice: you cannot use any method called "reverse".  That is
considered forbidden knowledge.

Examples

% java FunnyWord Enter a String: Anna

funny!

Enter a String: AnnA AnnA

funny!

Enter a String: A man, a plan, a canal: Panama.

funny!

Enter a String: foo

that is not funny

Enter a String: Annax

that is not funny

Enter a String: end

that is not funny

Answer 1

Code:

/*
*Program to check whether an input string is funny.
*String is funny if it reads same from both left and right side
*after ignoring spaces,punctualtion and case
*/

import java.util.Scanner;
public class FunnyWord {

  
    public static void main(String[] args) {
        String inputString;
      
        int len;
        Scanner input=new Scanner(System.in);
        System.out.println("Java FunnyWord ");
      
        //run the while loop till it is true
        while(true){
         
            System.out.print("\nEnter a string: "); //prompt user for a String
            inputString=input.nextLine(); //read a String from the user
          
          
            //remove everything other than word
            inputString=inputString.replaceAll("\\W","");
          
            //convert string to lowercase
            inputString=inputString.toLowerCase();
         
            //find the length of string
            len=inputString.length();
            String new1=""; // string from left side variable
            String new2=""; // string from right side variable
          
            //run for loop till it traverse the whole inputString
            for(int i=0;i<len;i++){
                new1=new1+inputString.charAt(i);
                new2=inputString.charAt(i)+new2;
            }
          
            //if left side string and right side string is equal
            if(new1.equals(new2))
                System.out.println("Funny!"); //print string is funny
            else{
                System.out.println("This is not Funny!"); //print string is not funny
                if(inputString.equals("end"))
                    break; //end if user enters end
            }
          
          
     
        }
      
      
      
      
    }
  
}

Output: