import org.eclipse.ui.dialogs.CheckedTreeSelectionDialog; //导入依赖的package包/类
public List<IProject> select() {
	CheckedTreeSelectionDialog dialog = new CheckedTreeSelectionDialog(
			shell, 
			new WorkbenchLabelProvider(),
			new ProjectSelectionContentProvider()) {
		@Override
		protected Label createMessageArea(Composite composite) {
			Label label = new Label(composite, SWT.WRAP);
			if (getMessage() != null) {
				label.setText(getMessage());
			}
			label.setFont(composite.getFont());
			GridData gd = new GridData(SWT.FILL, SWT.FILL, true, false);
			gd.widthHint = 300;
			label.setLayoutData(gd);
			return label;
		}
	};
	dialog.setContainerMode(true);
	dialog.setMessage("Choose projects to export");
	dialog.setTitle("Project selection");
	dialog.setInput(ResourcesPlugin.getWorkspace());
	dialog.setInitialSelection(ResourcesPlugin.getWorkspace().getRoot().getProjects());
	if (dialog.open() == Dialog.OK && dialog.getResult() != null) {
		ArrayList<IProject> projects = new ArrayList<IProject>();
		for (Object o: dialog.getResult()) {
			if (o instanceof IProject) {
				projects.add((IProject)o);
			}
		}
		return projects;
	}
	return Collections.emptyList();
}
 

import org.eclipse.ui.dialogs.CheckedTreeSelectionDialog; //导入依赖的package包/类
public List<IProject> select(Set<IProject> obsoleteProjects) {
	CheckedTreeSelectionDialog dialog = new CheckedTreeSelectionDialog(
			shell, 
			new WorkbenchLabelProvider(),
			new ProjectSelectionContentProvider()) {

		@Override
		protected Label createMessageArea(Composite composite) {
			Label label = new Label(composite, SWT.WRAP);
			if (getMessage() != null) {
				label.setText(getMessage());
			}
			label.setFont(composite.getFont());
			GridData gd = new GridData(SWT.FILL, SWT.FILL, true, false);
			gd.widthHint = 300;
			label.setLayoutData(gd);
			return label;
		}
	};
	dialog.setContainerMode(true);
	dialog.setMessage("Following project has been detected as obsolete, please select those to be removed from your workspace. Note, that their contents will not be removed from the file system.");
	dialog.setTitle("Delete obsolete projects");
	dialog.setInput(obsoleteProjects);
	if (dialog.open() == Dialog.OK && dialog.getResult() != null) {
		ArrayList<IProject> projects = new ArrayList<IProject>();
		for (Object o: dialog.getResult()) {
			if (o instanceof IProject) {
				projects.add((IProject)o);
			}
		}
		return projects;
	}
	return Collections.emptyList();
}
 

import org.eclipse.ui.dialogs.CheckedTreeSelectionDialog; //导入依赖的package包/类
public List<String> select(Repository repo) {
	CheckedTreeSelectionDialog dialog = new CheckedTreeSelectionDialog(
			shell, 
			new BranchesLabelProvider(),
			new BranchesContentProvider()) {
		@Override
		public void create() {
			super.create();
			getTreeViewer().expandAll();
		}
	};
	dialog.setContainerMode(true);
	dialog.setMessage("Choose change branches to remove from local repository:");
	dialog.setTitle("Changes cleanup");
	dialog.setInput(repo);
	dialog.setInitialSelection(ResourcesPlugin.getWorkspace().getRoot().getProjects());
	if (dialog.open() == Dialog.OK && dialog.getResult() != null) {
		ArrayList<String> changes = new ArrayList<String>();
		for (Object o: dialog.getResult()) {
			if (o instanceof Change) {
				changes.add(((Change)o).getFullName());
			}
		}
		return changes;
	}
	return Collections.emptyList();
}