/** * Tests if some key maps into the specified value in this hashtable. This operation is more * expensive than the <code>containsKey</code> method. * * <p>Note that this method is identical in functionality to containsValue, (which is part of the * Map interface in the collections framework). * * @param value a value to search for. * @return <code>true</code> if and only if some key maps to the <code>value</code> argument in * this hashtable as determined by the <tt>equals</tt> method; <code>false</code> otherwise. * @throws NullPointerException if the value is <code>null</code>. * @see #containsKey(int) * @see #containsValue(Object) * @see java.util.Map */ public boolean contains(Object value) { if (value == null) { I18nManager intl_mgr = I18nManager.getManager(); String msg = intl_mgr.getString(NO_VALUE_ERR_PROP); throw new NullPointerException(msg); } Entry[] tab = table; for (int i = tab.length; i-- > 0; ) { for (Entry e = tab[i]; e != null; e = e.next) { if (e.value.equals(value)) return true; } } return false; }