driver-core/src/main/com/mongodb/operation/CreateIndexesOperation.java
public List<String> getIndexNames() {
        List<String> indexNames = new ArrayList<String>(requests.size());
        for (IndexRequest request : requests) {
            if (request.getName() != null) {
                indexNames.add(request.getName());
            } else {
                indexNames.add(IndexHelper.generateIndexName(request.getKeys()));
            }
        }
        return indexNames;
    }
public List<String> getIndexNames() {
        List<String> indexNames = new ArrayList<String>(requests.size());
        for (IndexRequest request : requests) {
            if (request.getName() != null) {
                indexNames.add(request.getName());
            } else {
                indexNames.add(IndexHelper.generateIndexName(request.getKeys()));
            }
        }
        return indexNames;
    }
Gets the index names.

@return a list of index names