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What new features in java 7 do you find most useful?
What are some features that you like in the next version of Java?
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2476answers:
7
+8
A:
I'm looking forward to a decent date and time API being in the core libraries, so there's no excuse to use Date and Calendar any more (other than backward compatibility). Admittedly that's a library feature rather than language.
If the resource disposal feature gets in there - the equivalent of C#'s using statement - that will be really handy. Admittedly I'd really like closures in there as well, but introducing closures into Java is complicated by checked exceptions :(
Jon Skeet
2009-07-04 16:56:37
I agree, the Date implementation in Java's library is atrocious... especially if you are used to using .Net
jle
2009-07-04 17:00:26
The .NET APIs are nothing to crow about though - particularly before .NET 3.5, when we *finally* got non-local, non-UTC time zone support. It still doesn't really support the different ideas of an instant, local date, local time, duration etc. Joda Time is complicated, but only because the subject matter is inherently complicated.
Jon Skeet
2009-07-04 17:02:09
Looks likes the JSR spec lead is too busy to complete it before Java SE 7 deadline. I <3 JCP.
Tom Hawtin - tackline
2009-07-04 17:05:36
I will continue using joda-time :)
Macarse
2009-07-04 17:06:36
Joda Time FTW, so don't bother!
alamar
2009-07-04 17:48:12
If I have to fiddle with conversions between java.util.Date and java.sql.Date one more time, my head may or may not explode. It's pretty unclear at this time.
MattC
2009-07-05 03:49:17
Joda-Time is great, but as the joda lead is the JSR lead I'd seriously consider switching over when it is done.
GaryF
2010-08-26 13:59:49
It's not hugely great. In that example ArrayList<String> places = new ArrayList<String>(Arrays.asList("Buenos Aires", "Córdoba", "La Plata")); becomes ArrayList<String> places = new ArrayList<String>(["Buenos Aires", "Córdoba", "La Plata"]);
Tom Hawtin - tackline
2009-07-04 17:23:19
+11
A:
Since closures will -- as far as I know -- not be in Java 7, I'm not particularly interested in Java 7, anymore. I will probably use more alternative languages on the JVM like Scala or JRuby.
However, some Project Coin enhancements are nice (see also), e.g.
- multi-catching of exceptions
- Indexing syntax for lists and maps
- Collection literals
- Large arrays: When lsts of server have 16 GB+ memory and int slowly gets to small.
- "invokedynamic": New operation to better support dynamic languages on the JVM
Edit: It should be noted that some kind of closures will be in Java 7 (should it ever be released)
dmeister
2009-07-04 17:06:26
Large arrays and multi-catch are out, apparently: http://blogs.sun.com/darcy/entry/project_coin_final_five
Stu Thompson
2009-09-29 13:01:02
Anyone know what the collection literal syntax would be? Same as array literal?
TM
2010-05-04 17:37:40
What does this mean then? http://tech.puredanger.com/java7/#closuresIt says "YES" next to it? Too bad. I was looking forward to closures.
Vivin Paliath
2010-08-26 20:54:58
+6
A:
I do lots of IO work, so NIO2 is something I am looking forward too. From the JSR:
- A new filesystem interface that supports bulk access to file attributes, change notification, escape to filesystem-specific APIs, and a service-provider interface for pluggable filesystem implementations;
- An API for asynchronous (as opposed to polled, non-blocking) I/O operations on both sockets and files; and
- The completion of the socket-channel functionality defined in JSR-51, including the addition of support for binding, option configuration, and multicast datagrams.
Secondly, there are two things to reduce Java's verbosity that I'm looking forward to, albeit the later is almost trivial. Regardless, both will help make Java slightly more terse.
Simplified Generics are high on my happy list. Throw in modifiers and larger class names and these lines of code can get borderline unreadable.
Map<String, List<BigDecimal>> numberMap = new TreeMap<String, List<BigDecimal>>();
...becomes...
Map<String, List<BigDecimal>> numberMap = new TreeMap<>();
Stu Thompson
2009-07-05 07:16:09
Ah...I see the improved catch block is out. Sniff, sniff. http://blogs.sun.com/darcy/entry/project_coin_final_five
Stu Thompson
2009-09-29 12:59:44
This is a shortcut syntax for eliminating duplication when instanciating ojects of generic classes, but that's not type inference, at least not beyond that particular case.
Rafa Castaneda
2010-01-19 15:01:34
@Rafa Castaneda: Oops, you are correct. The two had merged in my mind.
Stu Thompson
2010-08-26 13:45:12
A:
java.util.programmer :) more productivity for programmer, modularity and independent.
Aizaz
2010-03-15 08:03:39