Created
January 21, 2024 09:35
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public static void fileCopy( File in, File out ) | |
throws IOException | |
{ | |
FileChannel inChannel = new FileInputStream( in ).getChannel(); | |
FileChannel outChannel = new FileOutputStream( out ).getChannel(); | |
try | |
{ | |
// inChannel.transferTo(0, inChannel.size(), outChannel); // original -- apparently has trouble copying large files on Windows | |
// magic number for Windows, 64Mb - 32Kb) | |
int maxCount = (64 * 1024 * 1024) - (32 * 1024); | |
long size = inChannel.size(); | |
long position = 0; | |
while ( position < size ) | |
{ | |
position += inChannel.transferTo( position, maxCount, outChannel ); | |
} | |
} | |
finally | |
{ | |
if ( inChannel != null ) | |
{ | |
inChannel.close(); | |
} | |
if ( outChannel != null ) | |
{ | |
outChannel.close(); | |
} | |
} | |
} |
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