枚举的简单使用

新建一个枚举类

public enum TreeOperator {/** * 增加 */Add,/** * 编辑 */Edit,/** * 删除 */Delete;}TreeOperator treeOperator = message.getTreeOperator();

switch (treeOperator) {   case Add:treeViewer.add(buildingFacade.getXiaoQu(),buildingFacade);treeViewer.setSelection(buildingFacade);break;   case Edit:treeViewer.update(buildingFacade);break;   case DeleteBuildingFacade obj = (BuildingFacade)treeViewer.getSelection();treeViewer.remove(obj);break;}