List<String> folderNames = Arrays.asList("Folder1", "Folder2", "...");
List<String> userMails = Arrays.asList("user1@domain.com", "user2@domain.com", "...");
String role = "reader"; // or "owner", "writer", "peeker", "none"
String appsName = "MyComp-MyApps-version";
String username = "username";
String password = "password";
 
if(!role.equals("reader")
&& !role.equals("writer")
&& !role.equals("owner")
&& !role.equals("none")
&& !role.equals("peeker"))  {
	return;
}
 
DocsService client = new DocsService(appsName);
client.setUserCredentials(username, password);
 
DocumentQuery query = new DocumentQuery(new URL("http://docs.google.com/feeds/default/private/full/-/folder"));
DocumentListFeed resultFeed = client.getFeed(query, DocumentListFeed.class);
for (DocumentListEntry entry : resultFeed.getEntries()) {
	for(String name : folderNames) {
		if(entry.getTitle().getPlainText().equalsIgnoreCase(name)) {
			for(String mail : userMails) {
				AclRole aclRole = new AclRole(role);
				AclScope aclScope = new AclScope(AclScope.Type.USER, mail);
				AclEntry aclEntry = new AclEntry();
				aclEntry.setRole(aclRole);
				aclEntry.setScope(aclScope);
				client.insert(new URL(entry.getAclFeedLink().getHref()), aclEntry);
			}
		}
	}
	AclFeed aclFeed = client.getFeed(new URL(entry.getAclFeedLink().getHref()), AclFeed.class);
	for (AclEntry aclEntry : aclFeed.getEntries()) {
	  System.out.println(
		aclEntry.getScope().getValue() + " (" + aclEntry.getScope().getType() + ") : " + aclEntry.getRole().getValue());
	}
}