OCA Java SE 7 Programmer I Certification Guide

Figure 4.18. Comparing the replace methods in String (left) and StringBuilder (right). The method replace in String accepts the characters to be replaced. The method replace in StringBuilder accepts a position to be replaced.

SubSequence()

Apart from using the method substring, you can also use the method subSequence to retrieve a subsequence of a StringBuilder object. This method returns objects of type CharSequence:

The method subsequence doesn’t modify the existing value of a StringBuilder object.

4.2.4. A quick note on the class StringBuffer ...