An example of a file copy that has progress and the ability to cancel.

Spike.java

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

/**
 * Created by ericcobb on 7/15/14.
 */
public class Spike {
	private static ExecutorService executor = Executors.newCachedThreadPool();

	public static void main(String[] args) throws ExecutionException, InterruptedException {

		CopyWorker worker = new CopyWorker();

		Future future = executor.submit(worker);
		Thread.sleep(100);
		worker.setStopped(true);
		future.get();

	}

	public static class CopyWorker implements Runnable {

		private boolean stopped = false;

		public boolean isStopped() {
			return stopped;
		}

		public void setStopped(boolean stopped) {
			this.stopped = stopped;
		}

		@Override
		public void run() {
			System.out.println("copying file");
			File filein = new File("/Users/ericcobb/Pictures/IMG_0335_1.MOV");
			File fileout = new File("/Users/ericcobb/Pictures/IMG_0335_1_copy.MOV");
			FileInputStream fin;
			FileOutputStream fout;
			long length = filein.length();
			long counter = 0;
			int r = 0;
			byte[] b = new byte[1024];
			try {
				fin = new FileInputStream(filein);
				fout = new FileOutputStream(fileout);
				while ((r = fin.read(b)) != -1 && !isStopped()) {
					counter += r;
					System.out.println(1.0 * counter / length);
					fout.write(b, 0, r);
				}
			}
			catch (Exception e) {
				System.out.println("foo");
			}
		}
	}
}