import java.util.Scanner;

public class test {
         private String char = null;

         public test() {
              if (char.equals("vowel") {
                  // do something
              } else {
                  // do something else
              }
         }

         public static void main(String args[]) {
              Scanner s = new Scanner(System.in);
              System.out.println("Enter character: ");
              char = s.nextLine();
              new test();
         }
}