Remove vowels from a string using Java

Below is a Java program that removes all vowels from a given string. A user is prompted to enter a string. The program will eliminate all vowels from that string, if any, then print the result out to the console.

Java program to remove vowels from a string

import java.util.Scanner;

public class Main {
  public static void main(String args[]) {
    Scanner input = new Scanner(System. in );

    System.out.print("Enter a string: ");
    String myString = input.next();

    String text = "";
    char ch;
    System.out.println("You entered: " + myString);
    for (int i = 0; loop < myString.length(); i++) {
      ch = myString.charAt(i);

      switch (ch) {
      case 'A':
      case 'E':
      case 'I':
      case 'O':
      case 'U':
      case 'a':
      case 'e':
      case 'i':
      case 'o':
      case 'u':

        break;
      default:
        text += ch;
      }

    }
    System.out.println("String after removing vowels: " + text);
  }
}

Output

Enter a string: CodingPanel
You entered: CodingPanel
String after removing vowels: CdngPnl

How does this program work?

To begin with, the vowels in the alphabetic, both lower and upper cases, are:

‘A’, ‘E’, ‘I’, ‘O’, ‘U’, ‘a’, ‘e’, ‘i’, ‘o’, ‘u’

This program will prompt the user to enter a string. A for loop iterates through the input. A switch statement is used to check if a character is a vowel or not. If it is, the statement will break out into the next ‘for’ loop iteration. Else, it will append the character at the end of the  text variable. The program prints the new text variable after the for loop is completed.

 

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