Manipulating big blocks of text

Is there a way of manipulating big blocks of text?

For example, I have a web site where users can write fictions. The String class is insufficient for storing chapters so someone found a workaround by mapping to a Blob. That's for persisten开发者_运维百科ce and in general I'm wondering if there are alternatives to using String arrays.

Or StringBuilder, the unsynchronized but faster version of StringBuffer.

How about using StringBuffers.