<xal xmlns="http://openxal.org/ui/html">  
    <gridPane width="500px" height="500px" columns="1" borderPosition="center" horizontalGap="12px" verticalGap="11px" evenlySpace="false" gridHorizontalGrabSpace="true" padding="10px">
      <horizontalBoxPane width="500px" alignment="start" pack="start" id="group1" caption="horizontalBoxPane: Alignment = start, Pack = start" borderWidth="1px" borderColor="#C0C0C0" borderStyle="solid" x="10px" y="10px" gridHorizontalGrabSpace="true" gridHorizontalAlignment="fill" gridVerticalGrabSpace="false" height="100px" padding="5px">
        <radioButton group="group1" text="Radio Button 1" selected="true"/>
        <radioButton group="group1" text="Radio Button 2"/>
      </horizontalBoxPane>
      <horizontalBoxPane width="500px" alignment="end" pack="center" id="group2" caption="horizontalBoxPane: Alignment = end, Pack = center" borderWidth="1px" borderColor="#C0C0C0" borderStyle="solid" x="10px" y="10px" gridHorizontalGrabSpace="true" gridHorizontalAlignment="fill" gridVerticalGrabSpace="false" height="100px">
        <radioButton group="group2" text="Radio Button 1" selected="true"/>
        <radioButton group="group2" text="Radio Button 2"/>
      </horizontalBoxPane>
    </gridPane>
</xal>