Java tutorial
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++)); } }