| Class | Description | 
|---|---|
| ByteArray | This class provides some utilities to manage I/O on a byte array. | 
| Constants | This class provides access to compile-time constants. | 
| EnqueuedWeakReference<T> | EnqueuedWeakReference are objects that are queued in an ReferenceQueue by the
 system when the object they point at (see
  Reference.get()) is set tonullby the
 system. | 
| Immortals | This class gives access to the global immortal objects pool. | 
| Immutables | This class gives access to the global immutable objects pool. | 
| ReferenceQueue<T> | ReferenceQueue represents a queue of EnqueuedWeakReference. | 
| ResourceArray | A resource array is an element of  ResourceBuffer. | 
| ResourceBuffer | A resource buffer contains a set of data which is compacted to obtain a
 minimal footprint. | 
| Timer | A facility for threads to schedule tasks for future execution in a background
 thread. | 
| TimerTask | A task that can be scheduled for one-time or repeated execution by a Timer. | 
| Util | This class offers basic services for B-ON implementation. | 
| WeakHashtable | A  Hashtableimplementation with weak keys. | 
| XMath | This class provides advanced mathematical functions. | 
| Exception | Description | 
|---|---|
| IllegalStateException | Signals that a method has been invoked at an illegal or inappropriate time. | 
| Error | Description | 
|---|---|
| ImmutablesError | Indicates an error accessing immutables data. | 
ESR001).