GWT client-side: java.util or com.google.gwt.dev.util?

Question

On a GWT client-side, is it better to use java.util, or com.google.gwt.dev.util? Does it matter? What is the biggest reason for com.google.gwt.dev.util existing?

For example, would it be better to use java.util.HashMap, or com.google.gwt.dev.util.collections.HashMap? Is it com.google.gwt.dev.util.collections.HashMap, as its JavaDoc says it's memory-efficient?

Answer 1

You should refrain from using any classes from gwt-dev library. gwt-dev.jar is not supposed to be present in your runtime class path. It is only required for running the application in development mode.

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