Java: Separate consonants and vowels from a given string

Last update on May 24 2025 12:59:30 (UTC/GMT +8 hours)

24. Separate Consonants and Vowels

Write a Java program to separate consonants and vowels from a given string.

Pictorial Presentation:

Sample Solution-1:

Java Code:

public class test {
 
   public static void main(String[] args) {	   
	    String text = "Java";
		System.out.println("Original String: "+text);
		System.out.println("Separate consonants and vowels of the said string: "+validate(text));
		text = "JavaScript";
		System.out.println("\nOriginal String: "+text);
		System.out.println("Separate consonants and vowels of the said string: "+validate(text));
		text = "SQLite";
		System.out.println("\nOriginal String: "+text);
		System.out.println("Separate consonants and vowels of the said string: "+validate(text));		
	}

   public static String validate(String text) {
		String text1 = text.replaceAll("(?i)[^aeiou]", "");
		String text2 = text.replaceAll("(?i)[aeiou]", "");
		return text2 + text1;
   }
}

Sample Output:

Original String: Java
Separate consonants and vowels of the said string: Jvaa

Original String: JavaScript
Separate consonants and vowels of the said string: JvScrptaai

Original String: SQLite
Separate consonants and vowels of the said string: SQLtie

Pictorial Presentation:

Flowchart :

Sample Solution-2:

Java Code:

public class test {
 
   public static void main(String[] args) {	   
	    String text = "Java";
		System.out.println("Original String: "+text);
		System.out.println("Separate consonants and vowels of the said string: "+validate(text));
		text = "JavaScript";
		System.out.println("\nOriginal String: "+text);
		System.out.println("Separate consonants and vowels of the said string: "+validate(text));
		text = "SQLite";
		System.out.println("\nOriginal String: "+text);
		System.out.println("Separate consonants and vowels of the said string: "+validate(text));		
	}

   public static String validate(String text) {
	    return text.replaceAll("[AEIOUaeiou]", "") +
		text.replaceAll("[^AEIOUaeiou]", "");
   }
}

Sample Output:

Original String: Java
Separate consonants and vowels of the said string: Jvaa

Original String: JavaScript
Separate consonants and vowels of the said string: JvScrptaai

Original String: SQLite
Separate consonants and vowels of the said string: SQLtie

Flowchart :

For more Practice: Solve these Related Problems:

• Write a Java program to split a string into two groups: one containing all vowels and one containing all consonants.
• Write a Java program to extract vowels and consonants from a given string using regex and print them separately.
• Write a Java program to implement a method that returns two lists—one for vowels and one for consonants—from an input string.
• Write a Java program to separate and then sort vowels and consonants from a string, displaying each group in order.

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