| Buffers | 
 Utility methods for common operations on Bitcoin P2P message buffers. 
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| ByteArray | 
 An effectively-immutable byte array. 
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| ByteUtils | 
 Utility methods for bit, byte, and integer manipulation and conversion. 
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| FutureUtils | 
 Utilities for CompletableFuture. 
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| HexFormat | 
 This class implements a subset of the functionality of the HexFormat class available in Java 17 and later. 
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| InternalUtils | 
 Utilities for internal use only. 
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| PlatformUtils | 
 Utilities for determining platform information (OS and runtime) 
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| Preconditions | 
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| Stopwatch | 
 A tool for measuring time, mainly for log messages. 
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| StreamUtils | 
 Stream Utilities. 
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| TimeUtils | 
 Utilities for time and mock time. 
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