These include convenience methods for reading and writing text-based files, significantly faster directory enumeration, and support for memory mapped files.
包括读写文本文件的便捷方法，快速地列举目录，对内存映射文件的支持。
I'll discuss an eighth type, MappedByteBuffer, available for memory-mapped files, later in this article.
在本文后面，我将讨论第8种类型MappedByteBuffer，它用于内存映射文件。
To help improve startup time, the JVM now works with memory-mapped files.
为了帮助改善启动时间，JVM现在和内存映射文件一起工作。
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