Java: Out with the Old, In with the New

Question

Java is nearing version 7. It occurs to me that there must be plenty of textbooks and training manuals kicking around that teach methods based on older versions of Java, whe

Answer 1

Using local variables of type StringBuffer to perform string concatenation. Unless synchronization is required, it is now recommended to use StringBuilder instead, because this class offers better performance (presumably because it is unsynchronized).