Question

Just discovered the Guava libraries project.

Do these work with GWT?

Answer 1

From the introductory PDF on that page,

You can use these libraries on...

On JDK 6

On Android
We think. Need volunteers to help us test it out.

On Google App Engine
We think. Need volunteers to help us test it out.

On GWT -- spotty!
Because GWT s JDK library support is spotty
Maybe 2/3 the stuff in these libraries is GWT-safe so far
Just look for @GwtCompatible!
Performance? Not necessarily good.

Answer 2

Here are some more details on how to accomplish this with the (currently latest) 19.0 release of Guava.

The Guava release consists of two JARs, guava-19.0.jar and guava-gwt-19.0.jar. You will need both for getting Guava to work within your GWT project. (In a non-GWT project you will only need the former.) Download them and add them to your project; if you use Maven, use these dependencies:
```
<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>19.0</version>
</dependency>
<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava-gwt</artifactId>
    <version>19.0</version>
</dependency>
```
Maven will then automatically download the two Jars from the Central Maven Repository, see also the Guava page on mvnrepositories. As an SBT user, you would go for something like libraryDependencies += "com.google.guava" % "guava" % "19.0".

Add

  <inherits name="com.google.common.collect.Collect"/>

to your GWT module file to enable Guava.

Answer 3

In the future, we ll release a working GWT module covering the @GwtCompatible subset of the library. Stay tuned.

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