import org.netbeans.spi.project.DeleteOperationImplementation; //导入依赖的package包/类
/**Test whether the delete operation is supported on the given project.
 * 
 * @param prj project to test
 * @return <code>true</code> if the project has a {@link DeleteOperationImplementation},
 *         <code>false</code> otherwise
 */
public static boolean isDeleteOperationSupported(Project prj) {
    return prj.getLookup().lookup(DeleteOperationImplementation.class) != null;
}
 

import org.netbeans.spi.project.DeleteOperationImplementation; //导入依赖的package包/类
/**Notification that the project is about to be deleted.
 * Should be called immediately before the project is deleted.
 *
 * The project is supposed to do all required cleanup to allow the project to be deleted.
 *
 * @param prj project to notify
 * @throws IOException is some error occurs
 * @see DeleteOperationImplementation#notifyDeleting
 */
public static void notifyDeleting(Project prj) throws IOException {
    for (DeleteOperationImplementation i : prj.getLookup().lookupAll(DeleteOperationImplementation.class)) {
        i.notifyDeleting();
    }
}
 

import org.netbeans.spi.project.DeleteOperationImplementation; //导入依赖的package包/类
/**Notification that the project has been deleted.
 * Should be called immediately after the project is deleted.
 *
 * @param prj project to notify
 * @throws IOException is some error occurs
 * @see DeleteOperationImplementation#notifyDeleted
 */
public static void notifyDeleted(Project prj) throws IOException {
    for (DeleteOperationImplementation i : prj.getLookup().lookupAll(DeleteOperationImplementation.class)) {
        i.notifyDeleted();
    }
}