Mihaela Hetea

It's correct, sorry, I did another example.

In the section "Additions to Java 8", in the last example for the merge function:

Map<String, String> favorites = new HashMap<>(); favorites.put("Jenny", "Bus Tour"); favorites.put("Tom", "Bus Tour"); favorites.merge("Jenny", "Skyride", mapper); favorites.merge("Sam", "Skyride", mapper); System.out.println(favorites); // {Tom=Bus Tour, Sam=Skyride}

the third line should be
favorites.put("Tom", null);
in order to get the listed output.

In table 7.5 the last method method name should be

scheduleWithFixedDelay (https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ScheduledExecutorService.html#scheduleWithFixedDelay(java.lang.Runnable,%20long,%20long,%20java.util.concurrent.TimeUnit))

instead of scheduleAtFixedDelay

Also, this typo is in the next pages too.

In table 7.3, Future methods, the method cancel() should have a boolean parameter.
From the java doc:
boolean cancel(boolean mayInterruptIfRunning);

Yes, it is question 12. Sorry, my mistake.

In question 20 of the review questions answer G is considered to be correct, but the Paths method is Paths.get and not Paths.getPath, so answer G should also be invalid.

On Windows, the method Paths.get(URI) doesn't throw a RuntimeException if the URI is not absolute.

Path path = Paths.get("panda", "cudly"); System.out.println(path); try { URI uri = new URI("file://pandas/cudly.png"); Path file1 = Paths.get(uri); System.out.println("File "+file1.toAbsolutePath()+" exists: "+Files.exists(file1)); System.out.println(file1.toUri()); } catch (URISyntaxException e) { e.printStackTrace(); }

The output is:
panda\cudly File \\pandas\cudly.png\ exists: false file://pandas/cudly.png/

Also the examples with the http schema throw exception java.nio.file.FileSystemNotFoundException: Provider "http" not installed.
From the implementation of getPath(URI) it seems that the file:// schema is taken by default, whereas for the others the method FileSystemProvider.installedProviders() is called, which on my computer returns file and jar. Does this mean that in the context of Path class only URI with schema file can be used or other providers can be installed? (like http for example)

Thanks.

In Chapter 9 NIO.2, "Changing a File Location with move()", the second Path object of
Files.move(Paths.get("c:\\user\\addresses.txt"), Paths.get("c:\\zoo-new\\addresses.txt"));

should have the name of the file addresses2.txt, according to the explanation:
"The second example moves the addresses.txt file from the directory user to the directory zoo-new, and it renames it to addresses2.txt.

This is the error I have too. Tried also with javac from command line but doesn't work either.
Tried also with java x86 1.8.0_45 and with java 1.8.0_71, same error.

The last example from chapter 4, "Collecting Using Grouping, Partitioning, and Mapping" does not compile:
Stream<String> ohMy = Stream.of("lions", "tigers", "bears"); Map<Integer, Optional<Character>> map = ohMy.collect( Collectors.groupingBy( String::length, Collectors.mapping(s -> s.charAt(0), Collectors.minBy(Comparator.naturalOrder())))); System.out.println(map); // {5=Optional[b], 6=Optional[t]}

The problem seems to be with the minBy collector. I'm using IntelliJ with java version 1.8.0_45

In chapter 4, "Peeking behind the scenes" in the second paragraph it says that "The source is an infinite stream of odd numbers", but the source is just an infinite stream of numbers.

Hello,

In chapter 4, Using Terminal Operations for the min() and max() operations, the method signatures are missing the Comparator interface.
Optional<T> min(<? super T> comparator) Optional<T> max(<? super T> comparator)

should be
Optional<T> min(Comparator<? super T> comparator) Optional<T> max(Comparator<? super T> comparator)