Java tutorial
import java.nio.ByteBuffer; import java.nio.channels.AsynchronousFileChannel; import java.nio.file.Paths; import java.nio.file.StandardOpenOption; import java.util.concurrent.Future; public class Test { public static void main(String[] args) throws Exception { AsynchronousFileChannel fileChannel = AsynchronousFileChannel.open(Paths.get("/asynchronous.txt"), StandardOpenOption.READ, StandardOpenOption.WRITE, StandardOpenOption.CREATE); Future<Integer> writeFuture1 = fileChannel.write(ByteBuffer.wrap("Sample".getBytes()), 0); Future<Integer> writeFuture2 = fileChannel.write(ByteBuffer.wrap("Box".getBytes()), 0); int result; result = writeFuture1.get(); System.out.println("Sample write completed with " + result + " bytes written"); result = writeFuture2.get(); System.out.println("Box write completed with " + result + " bytes written"); } }