How to do the opposite of StringBuilder append in Java?

Question

What would be the opposite of:

savedPlanets.append(planet.getDisplayName()+\",\");

I have a list and I am adding the name of the planet every t

Answer 1

I think you're using StringBuffer or something like that. It's not a good solution it this case, I would recommend you to use Set. http://docs.oracle.com/javase/6/docs/api/java/util/Set.html

Implement it like this:

Set planets = new HashSet();
planets.add("a");
planets.add("b");
planets.remove("a");