リソースにアクセス！

org.eclipse.core.resourcesの依存関係を追加して以下のようなコードでプロジェクト名一覧が表示される。

package org.okazuki.helloworld.actions;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;

public class ResourceAction implements IWorkbenchWindowActionDelegate {

	private IWorkbenchWindow window;
	
	public void dispose() {

	}

	public void init(IWorkbenchWindow window) {
		this.window = window;
	}

	public void run(IAction action) {
		IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
		IProject[] projects = root.getProjects();
		StringBuilder sb = new StringBuilder();
		for (IProject project : projects) {
			sb.append(project.getName()).append("\n");
		}
		MessageDialog.openConfirm(window.getShell(), "Plugins", sb.toString());
	}

	public void selectionChanged(IAction action, ISelection selection) {

	}

}