Nice and concise book showing the new features of Java 5 (Yes, I know, there is Java 6 now – but then I wasn’t aware yet of many of these features, and I guess, 6 doesn’t have as many so visible), nicely described with examples.

Things new to me, or things to remind myself about:

• Arrays.deepToString() & Arrays.deepEquals()
• Queue & PriorityQueue
• Overriding return types!
• Erasure
• Type wildcards <?> and generic types
• Enums (.valueOf(), .ordinal(), .values()) & EnumMaps & EnumSet
• varargs
• import static
• printf() = format()
• BlockingQueue
• TimeUnit
• new threading with return values -> Future, FutureTask; and thread scheduling -> Callable, Executor, ExecutorService