Question

Let's have some challenges!!

1. WAP in JAVA to remove all the space from the string.
2. Also, Make a separate program to remove all vowels from the string.

Restriction:
• You cannot use any Conditional statements like if else, ternary etc.
• No loopings​

Answer 1

$\texttt{\textsf{\large{\underline{Solution}:}}}$

Solution to question 1.

import java.util.*;

public class RemoveSpaces{

   public static void main(){

       Scanner _=new Scanner(System.in);

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

       String s=_.nextLine().replace(" ","");

       _.close();

       System.out.println("The new string after removal of spaces is: "+s);

   }

}

Solution to question 2.

import java.util.*;

public class RemoveVowels{

   public static void main(){

       Scanner _=new Scanner(System.in);

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

       String s=_.nextLine().replaceAll("[AEIOUaeiou]","");

       _.close();

       System.out.println("The new string after removal of vowels is: "+s);

   }

}

The above questions are solved using the methods listed below -

1. replace() - Searches for a specific string and replace them with another string.
2. replaceAll() - It searches for pattern in a string and replaces with another string. Here, I wrote - "[AEIOUaeiou]". This means if any of the characters inside [ and ] is found, then it is deleted.

$\texttt{\textsf{\large{\underline{Restrictions Followed}:}}}$

• No conditional statements used.
• No loop used.

See the attachment for output.

Answer 2

Answer:

Program:-

import java.util.*;

public class Main

{

public static void main(String args[])

{

Scanner in=new Scanner(System.in);

String st,st1,st2;

System.out.println("Enter a String");

st=in.nextLine();

st1=st.replace(" ","");

System.out.println("The new string after replacing spaces="+st1);

st2=st.replaceAll("[AEIOUaeiou]","");

System.out.println("The new string after replacing vowels="+st2);

}

}

Use of library methods:-

• The replace(a,b) method is used to replace the entered first character(inside method) and to replace the entered second character (inside method).

So, simply replace " " with "".

• The replaceAll([a],b) method is used to replace all the characters if it is found in the string.

So, simply replace "[AEIOUaeiou]" with"".

Note:-Don't place ',' inside the square brackets otherwise it will give an error.

Hope it helps...