Description: Derived the InputStream class and OutputStream class byte stream in the Java class library. Thanks to InputStream, OutputStream is aimed at the byte stream, so must be defined before reading byte[] file, then the file stream to read into byte[].
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TestFileIO
..........\.classpath
..........\.project
..........\.settings
..........\.........\org.eclipse.jdt.core.prefs
..........\bin
..........\...\TestFileIO.class
..........\bookInfo.txt
..........\src
..........\...\TestFileIO.java