solve the in following java code
import java.io.*;
class vowels
{
public static void main(String args[])throws IOException
{
// this coding is to check the vowel letters
BufferedReader s= new BufferedReader(new InputStreamreader(System.in));
String x;
System.out.println("enter a letter");
(s.readLine());
if(x.equals("a"))
{
System.out.println(x+"It is vowel");
}
else
if(x.equals("e"))
{
System.out.println(x+"It is vowel");
}
else
if(x.equals("i"))
{
System.out.println(x+"It is vowel");
}
else
if(x.equals("o"))
{
System.out.println(x+"It is vowel");
}
else
if(x.equals("u"))
{
System.out.println(x+"It is vowel");
}
else
{
System.out.println(x+"It is not vowel");
}
}
}