public class IsLowerCase
{
    public static void main(String[] args) 
    {
        char c;

        c = 'd';    // Change this and demo

        if ( 97 <= c && c <= 122 )
            System.out.println("Lowercase letter");
        else
            System.out.println("Not a lowercase letter");
        
        if ( 'a' <= c && c <= 'z' )
            System.out.println("Lowercase letter");
        else
            System.out.println("Not a lowercase letter");
          
        if ( Character.isLowerCase(c) )
            System.out.println("Lowercase letter");
        else
            System.out.println("No an Lowercase letter");
    }
}