public void stop() {
		resume();
		final Thread thread = _thread;
		if (thread != null) {
			thread.interrupt();
			try {
				thread.join();
			} catch (InterruptedException e) {
				Thread.currentThread().interrupt();
			} finally {
				_thread = null;
			}
		}
	}
Stops the current evolution, if running.
jenetics.example/src/main/java/io/jenetics/example/image/EvolvingImagesWorker.java