Transfers通道传输接口
Channel to Channel Transfers通道传输接口
transferFrom()
RandomAccessFile fromFile = new RandomAccessFile("fromFile.txt", "rw");
FileChannel fromChannel = fromFile.getChannel();
RandomAccessFile toFile = new RandomAccessFile("toFile.txt", "rw");
FileChannel toChannel = toFile.getChannel();
long position = 0;
long count = fromChannel.size();
toChannel.transferFrom(fromChannel, position, count);transferTo()
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