CommandContributionItemParameter aEnParam = new CommandContributionItemParameter(theWindow, "Language.en.Label", "com.compxc.workbench.presentation.command.changeLanguageCommand", IAction.AS_RADIO_BUTTON); aEnParam.label = ResourceManager.getText("Language.en.Label"); HashMap<String, String> aEnParamMap = new HashMap<String, String>(); aEnParamMap.put("org.eclipse.ui.commands.radioStateParameter", "EN"); aEnParam.parameters = aEnParamMap; englishAction = new CommandContributionItem(aEnParam); theMenuBar.add(englishAction);