Question

I’ve tried searching but couldn’t come up with a defined way on how to add your own packages to a GWT project.

My tree structure looks like this:

-com.mycompany   -public     MyApplication.html   MyApplication.gwt.xml   -com.mycompany.client   MyApp.java  -com.mycompany.gui   TableLayout.java 

The answer I’ve seen out there says to add the packages relative to the root directory of the gwt.xml file, like so:

<module>   <inherits name='com.google.gwt.user.User' />   <entry-point class='com.mycompany.client.MyApp' />   <source path='client' />   <source path='gui' /> </module> 

It then complains:

Unable to find type 'com.technicon.client.MyApp'    Hint: Previous compiler errors may have made this type unavailable    Hint: Check the inheritance chain from your module; it may not be inheriting a required module or a module may not be adding its source path entries properly 

Can anyone tell me what I’m doing wrong and how to fix this?

Answer 1

You can get rid of the two source path lines, because by default GWT will pick up anything that is relative to the root, and in the client package like you have. You also need to move your gui package into your client package, so it would become:

-com.mycompany   -public     MyApplication.html   MyApplication.gwt.xml   -com.mycompany.client   MyApp.java  -com.mycompany.client.gui   TableLayout.java   <module>   <inherits name='com.google.gwt.user.User' />   <entry-point class='com.mycompany.client.MyApp' /> </module> 

Assuming your MyApp.java is an actual EntryPoint, then this should work just fine.

One other thing to note is that you cannot use java classes that are not part of the GWT JRE Emulation library, and your project won’t compile if you do. You should get very specific errors about this though. For example you cannot use library classes like java.math.BigDecimal, if they are not emulated. All of your own classes you create can be used though.