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Is Java 8 compatible with GWT 2.6 or 2.7?

I have an application that is developed using GWT 2.6 and Java 7. Now I upgrade it to Java 8 using GWT 2.6.

  • Is GWT 2.6 compatible with Java 8? Will he build / compile a fine?
  • Is GWT 2.7 compatible with Java 8? Any suggestion?
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6 answers

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

Java 8 as a source language would not be supported until GWT 2.8, though, as others have already pointed out.

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

On the server, you can use JDK8.

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Java 8 support should appear 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 far as I understand, there are some improvements in 2.7, but this is not enough. There is a way that dividing the project, you can achieve that you can use Java 8 on the server side and java 7 with GWT in the user interface.

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

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It seems to be GWT 2.8 and 3.0.

In the meantime, GWT 2.8 will be released within three months. Its main function is support for Java 8, including lambdas.

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

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According to release notes for 2.8.0

The main

  • Java 8 syntax is supported.
  • JsInterop has finished experimental. See the Ultimate JsInterop Specification.
  • GSS is no longer considered experimental, and the old CssResource is now deprecated.

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

Update: The stable version 2.8.0 was released on October 20, 2016.

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