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The RandomAccessFile class offers all the functionality of DataInputStream and DataOutputStream combined, plus additional capabilities.
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To open a random access file for reading, use:
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RandomAccessFile in =
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new RandomAccessFile( filename, "r" );
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Such a file may be accessed sequentially with
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in.readLine();
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or randomly by repositioning the file pointer:
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in.seek( offset );
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where offset is a byte offset into the random file. (Use "rw" for read/write access.)
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Random access files have no inherent structure; the structure must be imposed by the programmer.
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