Is Java 8 compatible with GWT 2.6 or 2.7?

Question

I have an application which is developed using GWT 2.6 and Java 7. Now I am updating it to Java 8 with GWT 2.6.

Is GWT 2.6 compatible with Java 8? Will it build/compile fine?
Is GWT 2.7 compatible with Java 8? Any suggestion?

1

yes i tried...getting exception – moh Apr 28 '15 at 09:11

Thomas Broyer · Accepted Answer · 2015-04-28T13:57:18.863

14

If you're only interested in using a JDK 8 to compile your application, without using Java 8 language constructs, then GWT 2.6 and 2.7 will work.

Java 8 as a source language won't be supported before GWT 2.8 though, as already pointed by others.

edited Apr 28 '15 at 13:57

answered Apr 28 '15 at 09:53

Thomas Broyer

64,353
7
91
164

Is it possible to use Java 8 language constructs on the server side in GWT 2.6 / 2.7, or is that not even possible? What's the advantage of using JDK 8 to compile, but not using java 8 language constructs? – Stealth Rabbi Aug 03 '16 at 11:49
Of course you can, as long as you have a Java 8 JVM to run it; it's just Java. – Thomas Broyer Aug 03 '16 at 21:30
What I'd I cannot update to 2.6 because of dependencies? – Alex78191 Sep 26 '18 at 03:11

score 3 · Answer 2 · answered Apr 28 '15 at 07:47

3

In 2.7, you can use the Java7 syntax on the client. You cannot use the Java8 syntax and runtime on the client.

On the server, you can use JDK8.

answered Apr 28 '15 at 07:47

thst

4,592
1
26
40

score 1 · Answer 3 · edited May 23 '17 at 12:34

1

Java 8 support should come in GWT 2.8 according to this post: Java 8 support in GWT.

So, basically you cannot use Java 8 in GWT 2.6. As I understand there are some improvements in 2.7, but it is not enough. There is a way that by dividing the project you can achieve that you can use Java 8 on the server side and java 7 with GWT on UI.

edited May 23 '17 at 12:34

Community

1
1

answered Apr 28 '15 at 07:50

Rufi

2,529
1
20
41

score 0 · Answer 4 · edited May 23 '17 at 11:54

0

Edit: you should take a look at this Java 8 support in GWT

edited May 23 '17 at 11:54

Community

1
1

answered Apr 28 '15 at 07:47

Drustant

9
2

Please give attribution when you copy/paste someone else's answer (and it's even better if it doesn't look like you're the author but are just quoting someone else): https://stackoverflow.com/a/15693528/116472 It's even worth when you do it wrong and it looks like you're contradicting yourself (sic!) in just 2 sentences. – Thomas Broyer Apr 28 '15 at 09:46

score 0 · Answer 5 · answered Apr 28 '15 at 07:47

It's seems to be GWT 2.8 and 3.0.

In the meantime, GWT 2.8 is due out within three months. Its main feature is support for Java 8, including lambdas.

http://www.infoworld.com/article/2874861/application-development/google-web-toolkit-major-upgrades-no-backward-compatibility.html

Alex · Answer 6 · 2017-02-13T16:15:08.910

0

According to Release Notes for 2.8.0

Highlights

Java 8 syntax supported.

JsInterop has graduated from experimental. See final JsInterop specification.

GSS is no longer considered as experimental and old CssResource is now deprecated.

http://www.gwtproject.org/release-notes.html#Release_Notes_2_8_0_BETA1

Update: Stable version of 2.8.0 is released on Oct 20, 2016

edited Feb 13 '17 at 16:15

answered Mar 03 '16 at 14:36

Alex

521
7
7

Is Java 8 compatible with GWT 2.6 or 2.7?

6 Answers6

Linked