Jiggler.java

import java.awt.*;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

public class Jiggler implements Runnable {

    private final Robot robot;

    private Jiggler() {
        try {
            robot = new Robot();
        } catch (AWTException e) {
            throw new IllegalStateException("Initialization failed", e);
        }
    }

    @Override
    public void run() {
        final Point p = MouseInfo.getPointerInfo().getLocation();
        robot.mouseMove(p.x, p.y);
    }

    public static void main(String[] args) {
        Executors.newSingleThreadScheduledExecutor()
                .scheduleAtFixedRate(new Jiggler(), 0, 42, TimeUnit.SECONDS);
    }
}