Thread: String help please!

I've been going through the StringBuffer part of my unit and believe that I have gained enough understanding to manipulate the StringBuffer in a program. Yet each time I try to invoke one of the methods outlined in the unit, I'm given an error message. Is there something wrong with my syntax or logic? Is there something that I need to import? Any help would be appreciated. I am attaching my output below. Thank you all so much!

public class StringBuffer
{
public static void main(String[] args)
{
StringBuffer sbuff = new StringBuffer();

//one attempt to append - error
sbuff.append("Jenna");

//second attempt to append - error
String phrase = new String("Jenna");
sbuff.append(phrase);

//attempts to call upon other methods - errors
System.out.println("Your name backwards is: " + sbuff.reverse());
System.out.println("The length of your name is: " + sbuff.length());
}
}

Take a look at the name of your own class, and then tell me what you think will happen when you call, new StringBuffer. How does Java know which one you mean?

Rolf