Examples of java.util.Hashtable.keySet()

java.util.Hashtable.keySet()
Returns a {@link Set} view of the keys contained in this map.The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. If the map is modified while an iteration over the set is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The set supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations. @since 1.2

        new Integer(1), new Integer(102), new Integer(203) }));
    list.remove(remove1);
    list.remove(remove2);
    assertTrue("Wrong result", it.next().equals(list.get(0)));
    assertEquals("Wrong size", 1, map.size());
    assertTrue("Wrong contents", map.keySet().iterator().next().equals(
        list.get(0)));


    Map map2 = new Hashtable(101);
    map2.put(new Integer(1), "1");
    map2.put(new Integer(4), "4");

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        list.get(0)));


    Map map2 = new Hashtable(101);
    map2.put(new Integer(1), "1");
    map2.put(new Integer(4), "4");
    Iterator it2 = map2.keySet().iterator();
    Integer remove3 = (Integer) it2.next();
    Integer next;
    if (remove3.intValue() == 1)
      next = new Integer(4);
    else

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      next = new Integer(1);
    it2.hasNext();
    it2.remove();
    assertTrue("Wrong result 2", it2.next().equals(next));
    assertEquals("Wrong size 2", 1, map2.size());
    assertTrue("Wrong contents 2", map2.keySet().iterator().next().equals(
        next));
  }


  /**
   * @tests java.util.Hashtable#keySet()

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          ht.remove(String.valueOf(i));
        }
      }
    };
    t1.start();
    Set set = ht.keySet();
    for (int i = 0; i < iterations; i++) {
      Iterator it = set.iterator();
      try {
        it.next();
        it.remove();

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    // 0: "1"
    // 1: "12" -> "9" -> "2"
    Enumeration en = ht.elements();
    // cache the first entry
    en.hasMoreElements();
    Iterator it = ht.keySet().iterator();
    // this is mostly a copy of the test in test_elements_subtest0()
    // test removing with the iterator does not null the values
    while (it.hasNext()) {
      String key = (String) it.next();
      if ("12".equals(key) || "9".equals(key)) {

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        }
      }// end while more entries
    }// end for all providers


    Provider provTest[] = null;
    Iterator it = allSupported.keySet().iterator();
    while (it.hasNext()) {
      String filterString = (String) it.next();
      try {
        provTest = Security.getProviders(filterString);
        int expected = ((Integer) allSupported.get(filterString))

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     */
    public static ObjectName createObjectName(Map nameMap) {
        Hashtable objectNameMap = new Hashtable(nameMap);
        String type = (String) nameMap.get(J2EE_TYPE);
        if ("JVM".equals(type)) {
            objectNameMap.keySet().retainAll(Arrays.asList(new String[] {J2EE_TYPE, J2EE_NAME, "J2EEServer"}));
            objectNameMap.put("J2EEServer", DEFAULT_SERVER_NAME);
        } else if ("J2EEDomain".equals(type)) {
            //special case J2EEDomain gbean
            objectNameMap.clear();
            objectNameMap.put(J2EE_TYPE, "J2EEDomain");

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     */
    public static ObjectName createObjectName(Map nameMap) {
        Hashtable objectNameMap = new Hashtable(nameMap);
        String type = (String) nameMap.get(J2EE_TYPE);
        if ("JVM".equals(type)) {
            objectNameMap.keySet().retainAll(Arrays.asList(new String[] {J2EE_TYPE, J2EE_NAME, "J2EEServer"}));
            objectNameMap.put("J2EEServer", DEFAULT_SERVER_NAME);
        } else if ("J2EEDomain".equals(type)) {
            //special case J2EEDomain gbean
            objectNameMap.clear();
            objectNameMap.put(J2EE_TYPE, "J2EEDomain");

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            int psrOffset = usr.getPersistPointersOffset();


            PersistPtrHolder ptr = (PersistPtrHolder)Record.buildRecordAtOffset(docstream, psrOffset);
            lst.add(new Integer(psrOffset));
            Hashtable entries = ptr.getSlideLocationsLookup();
            for (Iterator it = entries.keySet().iterator(); it.hasNext(); ) {
                Integer id = (Integer)it.next();
                Integer offset = (Integer)entries.get(id);


                lst.add(offset);
                offset2id.put(offset, id);

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                String key = (String)lists.next();
                str = str + "\n    " + "list name: " + key;
                Hashtable list = (Hashtable)_srcLists.get(key);
                if(list!=null)
                {
                    Object[] keys = (Object[])list.keySet().toArray();
                    for(int i=0; i<keys.length; i++)
                        str = str + "\n      " + keys[i]; // + "   xpath=" + list.get(keys[i]);
                }
            }
        }

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