Who do I get the IResolution value list for a workitem through the Jazz
API using plain Java code?

If you have a workitem, then you can find the resolutions as follows:

IWorkflowInfo workflowInfo= workItemClient.findWorkflowInfo(workitem,
monitor);

For all resolutions:
Identifier<IResolution>[] resolutions= workflowInfo.getAllResolutionIds();

For all resolutions of a specific state:
Identifier<IResolution>[] resolutions=
workflowInfo.getStateResolutionIds(stateId);

For all resolutions of a specific action:
Identifier<IResolution>[] resolutions=
workflowInfo.getResolutionIds(actionId);

The name and icon of the resolution can then be accessed using
String name= workflowInfo.getResolutionName(resolutionId);
URL iconURL= workflowInfo.getResolutionIconName(resolutionId);
ImageDescriptor imageDescriptor= WorkItemUI.getImageDescriptor(iconURL);


HTH,
Patrick
Jazz Work Item Team