问题
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?
回答1:
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.
回答2:
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.
回答3:
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.
回答4:
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
回答5:
Edit: you should take a look at this Java 8 support in GWT
回答6:
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
来源：https://stackoverflow.com/questions/29913237/is-java-8-compatible-with-gwt-2-6-or-2-7