A program in Java to replace all the vowels in a string with a specified character.

April 7, 2023
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In the above Java program to replace all the vowels in a string with a specified character we created a function named validate() and then with the help of a built-in function “replaceAll”, replaced the vowel with passed string.

Example
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import java.util.Scanner;
public class replace{
public static void main(String[] args) {  
            Scanner in = new Scanner(System.in);
            System.out.print("Input the string: ");
            String txt = in.nextLine();    
                System.out.println("Original string: "+txt);
                System.out.println("After replacing vowel(s) with specified Character: "+validate(txt,   '#'));
        }
 
   public static String validate(String txt, char chr) {
           return txt.replaceAll("[aeiouAEIOU]", "" + chr);
  }
}
Sample Output:
Input the string: lazy frog
Original string: lazy frog
After replacing vowel(s) with specified Character: l#zy fr#g

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