27  * @summary Test empty iterators, enumerations, and collections

    27  * @summary Test empty iterators, enumerations, and collections

    28  */

    28  */

    29 

    29 

    30 import static java.util.Collections.*;

    30 import static java.util.Collections.*;

    31 import java.util.*;

    31 import java.util.*;

    32 

    33 

    33 public class EmptyIterator {

    34 public class EmptyIterator {

    34 

    35 

    35     void test(String[] args) throws Throwable {

    36     void test(String[] args) throws Throwable {

    36         testEmptyCollection(emptyList());

    37         testEmptyCollection(emptyList());

    37         testEmptyCollection(emptySet());

    38         testEmptyCollection(emptySet());

    39         testEmptyMap(emptyMap());

    40         testEmptyMap(emptyMap());

    40 

    41 

    41         Hashtable<?,?> emptyTable = new Hashtable<>();

    42         Hashtable<?,?> emptyTable = new Hashtable<>();

    42         testEmptyEnumeration(emptyTable.keys());

    43         testEmptyEnumeration(emptyTable.keys());

    43         testEmptyEnumeration(emptyTable.elements());

    44         testEmptyEnumeration(emptyTable.elements());