while (i < topcols.length) {
System.out.println(topcols[i] + ":");
// Get all the collections for this database.
Collection col = app.getCollection(topcols[i]);
String [] collections = col.listCollections();
int j = 0;
while (j < collections.length) {
System.out.println("\t" + collections[j]);
j++;
}