| Interface | Description | 
|---|---|
| Cacheable | |
| FileUtils.OutputStreamConsumer | 
| Class | Description | 
|---|---|
| ByteBufferUtils | |
| CloseableIterators | |
| CompressionUtils | |
| DateTimes | |
| DateTimes.UtcFormatter | 
 Simple wrapper class to enforce UTC Chronology in formatter. 
 | 
| FileUtils | |
| FileUtils.FileCopyResult | 
 Keeps results of a file copy, including children and total size of the resultant files. 
 | 
| Intervals | |
| JodaUtils | |
| MappedByteBufferHandler | 
 Facilitates using try-with-resources with  
MappedByteBuffers which don't implement AutoCloseable. | 
| MapUtils | |
| Pair<T1,T2> | |
| RetryUtils | |
| StreamUtils | |
| StringUtils | 
 As of OpenJDK / Oracle JDK 8, the JVM is optimized around String charset variable instead of Charset passing, that
 is exploited in  
StringUtils.toUtf8(String) and StringUtils.fromUtf8(byte[]). | 
| Exception | Description | 
|---|---|
| IAE | |
| IOE | |
| ISE | |
| RE | |
| UOE | 
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