| Class Summary | 
| ArrayCounter | Collection of routines for counting the distribution of the values
 in an int[] array. | 
| ArrayUtil | Collection of static methods for operations on arrays | 
| AsciiStringInputStream | minimal InputStream subclass to fetch low order bytes form a String | 
| BooleanConverter | Collection of static helper methods for converting types into boolean; | 
| DoubleIntTable | Minimal class for maintaining and searching an int to int sorted lookup
 table. | 
| FileUtil | A collection of static file management methods. | 
| HashMap | This class does not store null keys. | 
| HashMappedList | Implementation of an Map which maintains the user-defined order of the keys. | 
| HashSet | This class does not store null keys. | 
| HsqlArrayHeap | An HsqlHeap implementation backed by an array of objects and an ObjectComparator. | 
| HsqlArrayList | Intended as an asynchronous alternative to Vector. | 
| HsqlByteArrayInputStream | This class is a replacement for both java.io.ByteArrayInputStream
 (without synchronization) and java.io.DataInputStream | 
| HsqlByteArrayOutputStream | This class is a replacement for both java.io.ByteArrayOuputStream
 (without synchronization) and java.io.DataOutputStream | 
| HsqlDeque | jdk 1.1 compatible minimal implementation of a list object suitable for
 stack, queue and deque usage patterns backed by an Object[]. | 
| HsqlLinkedList | Intended as an asynchronous alternative to HsqlArrayList. | 
| HsqlTaskQueue | Provides very simple queued execution of Runnable objects in a background
 thread. | 
| HsqlTimer | Provides facility for threads to schedule tasks for future execution in a
 background thread. | 
| InOutUtil | Input / Output utility | 
| IntKeyHashMap |  | 
| IntKeyIntValueHashMap |  | 
| IntValueHashMap | This class does not store null keys. | 
| MD5 | Provides a static utility interface to an MD5 digest algorithm
 obtained through the java.security.MessageDigest spi. | 
| Sort |  | 
| Sort.StringComparator |  | 
| StopWatch | Provides the programatic analog of a physical stop watch. | 
| StringConverter | Collection of static methods for converting strings between different
 formats and to and from byte arrays | 
| StringInputStream | minimal InputStream subclass to fetch bytes form a String | 
| StringUtil | Provides a collection of convenience methods for processing and
 creating objects with Stringvalue components. | 
| WrapperIterator | An Iterator that returns the elements of a specified array, or other
  iterators etc. | 
| ZipUnzipFile |  |