Remove all vowel from user input a string in java

In this java program, we have to delete all occurrences of vowel characters from a given string and then print it on screen

The logic behind this question is simple. It is to remove the vowels in the given string and display the input string without vowels (i.e with only consonants).

Here we are using two approach.

1.Using Indexof() Method

Java String indexOf() method is used to find the index of a specified character or substring in a given String.

Method returns -1 if the specified char/substring is not found in the particular String.

import java.util.Scanner;

public class R_Vowels {

public static void main(String[] args) {

Scanner sc=new Scanner(System.in);

System.err.println("Enter the String :");

String s1=sc.nextLine();

String s2="AEIOUaeiou";

String s3=" ";

for(int i=0;i<s1.length();i++)

{

char c=s1.charAt(i);

int o=s2.indexOf(c);

System.err.println(o);

if(o==-1)

{

s3=s3+c;

}

System.err.println(s3);

}

2. ReplaceAll method

public class D_Vowels
{
public static void main(String args[])
{
String s1, output;
Scanner scanner = new Scanner(System.in);

System.out.println("Enter a String");
s1 = scanner.nextLine();

// remove Vowel from input String using replaceAll method
output = s1.replaceAll("[AEIOUaeiou]", "");

System.out.println("Output String\n" + output);
}
}