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import java.io.File;
import java.io.FileInputStream;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
public class MainClass {
public static void main(String[] args) throws Exception {
long length = new File("test.txt").length();
MappedByteBuffer in = new FileInputStream("test.txt").getChannel().map(
FileChannel.MapMode.READ_ONLY, 0, length);
int i = 0;
while (i < length)
System.out.print((char) in.get(i++));
}
}
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