工具、菜单栏右对齐

方法一：指定menuContribution：

toolbar:org.eclipse.ui.main.toolbar - the top-level tool bar
toolbar:org.eclipse.ui.trim.command1 - the top left trim
toolbar:org.eclipse.ui.trim.command2 - the top right trim
toolbar:org.eclipse.ui.trim.vertical1 - the left vertical trim
toolbar:org.eclipse.ui.trim.vertical2 - the right vertical trim
toolbar:org.eclipse.ui.trim.status - the status line trim

配合http://help.eclipse.org/helios/index.jsp?topic=%2Forg.eclipse.platform.doc.isv%2Fguide%2Fworkbench_cmd_menus.htm 适用

方法二：
<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>

   <extension
         id="application"
         point="org.eclipse.core.runtime.applications">
      <application>
         <run
               class="de.vogella.rcp.commands.runtimecommands.Application">
         </run>
      </application>
   </extension>
   <extension
         point="org.eclipse.ui.perspectives">
      <perspective
            name="RCP Perspective"
            class="de.vogella.rcp.commands.runtimecommands.Perspective"
            id="de.vogella.rcp.commands.runtimecommands.perspective">
      </perspective>
   </extension>
   <extension
         point="org.eclipse.ui.menus">
      <menuContribution
            class="de.vogella.rcp.commands.runtimecommands.DefineCommands"
            locationURI="menu:org.eclipse.ui.main.menu">
      </menuContribution>
   </extension>

</plugin>


package de.vogella.rcp.commands.runtimecommands;

import org.eclipse.swt.SWT;
import org.eclipse.ui.menus.CommandContributionItem;
import org.eclipse.ui.menus.CommandContributionItemParameter;
import org.eclipse.ui.menus.ExtensionContributionFactory;
import org.eclipse.ui.menus.IContributionRoot;
import org.eclipse.ui.services.IServiceLocator;

public class DefineCommands extends ExtensionContributionFactory {

    @Override
    public void createContributionItems(IServiceLocator serviceLocator,
            IContributionRoot additions) {
        CommandContributionItemParameter p = new CommandContributionItemParameter(
                serviceLocator, "",
                "org.eclipse.ui.file.exit",
                SWT.PUSH);
        p.label = "Exit the application";
        p.icon = Activator.getImageDescriptor("icons/alt_window_16.gif");

        CommandContributionItem item = new CommandContributionItem(p);
        item.setVisible(true);
        additions.addContributionItem(item, null);
    }

}


来自：http://www.vogella.com/blog/2009/12/03/commands-menu-runtime/
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