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How to remove vowels from a string using regular expressions in Java?
The simple character class “[ ]” matches all the specified characters in it. The following expression matches the characters except for xyz.
"[xyz]"
Similarly, the following expression matches all the vowels in the given input string.
"([^aeiouAEIOU0-9\W]+)";
Then you can remove the matched characters by replacing them with the empty string “”, using the replaceAll() method.
Example 1
public class RemovingVowels {
public static void main( String args[] ) {
String input = "Hi welcome to tutorialspoint";
String regex = "[aeiouAEIOU]";
String result = input.replaceAll(regex, "");
System.out.println("Result: "+result);
}
}Output
Result: H wlcm t ttrlspnt
Example 2
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test {
public static void main( String args[] ) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter input string: ");
String input = sc.nextLine();
String regex = "[aeiouAEIOU]";
String constants = "";
System.out.println("Input string: \n"+input);
//Creating a pattern object
Pattern pattern = Pattern.compile(regex);
//Matching the compiled pattern in the String
Matcher matcher = pattern.matcher(input);
//Creating an empty string buffer
StringBuffer sb = new StringBuffer();
while (matcher.find()) {
constants = constants+matcher.group();
matcher.appendReplacement(sb, "");
}
matcher.appendTail(sb);
System.out.println("Result: \n"+ sb.toString()+constants );
}
}Output
Enter input string: this is a sample text Input string: this is a sample text Result: ths s smpl txtiiaaee
Updated on: 21-Nov-2019
1K+ Views
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