How to extract the first n characters from a string using Java?

To find the consonants in the given String compare every character in it using the charAt() method with the vowel letters and remaining are consonants.

Example

Live Demo

public class FindingConsonants {
   public static void main(String args[]) {

      String str = new String("Hi Welcome to Tutorialspoint");
      for(int i=0; i<str.length(); i++) {
         if(str.charAt(i) == 'a'|| str.charAt(i) == 'e'|| str.charAt(i) == 'i' ||
            str.charAt(i) == 'o' || str.charAt(i) == 'u'|| str.charAt(i) == ' ') {
         }else{
            System.out.println("Given string contains "+str.charAt(i)+" at the index "+i);
         }
      }
   }
}

Output

Given string contains H at the index 0
Given string contains W at the index 3
Given string contains l at the index 5
Given string contains c at the index 6
Given string contains m at the index 8
Given string contains t at the index 11
Given string contains T at the index 14
Given string contains t at the index 16
Given string contains r at the index 18
Given string contains l at the index 21
Given string contains s at the index 22
Given string contains p at the index 23
Given string contains n at the index 26
Given string contains t at the index 27