import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
public class MainClass {
public static void main(String[] argv) throws IOException {
RandomAccessFile randomAccessFile = new RandomAccessFile("test.dat", "r");
randomAccessFile.seek(1000);
FileChannel fileChannel = randomAccessFile.getChannel();
// This will print "1000"
System.out.println("file pos: " + fileChannel.position());
randomAccessFile.seek(500);
// This will print "500"
System.out.println("file pos: " + fileChannel.position());
fileChannel.position(200);
// This will print "200"
System.out.println("file pos: " + randomAccessFile.getFilePointer());
}
}