public void DoSomething(){ //this method is invoked when button is clicked
        ExampleService s = new ExampleService();
        s.setValue1(s1.getValue()); //s1,s2 - UI elements
        s.setValue2(s2.getValue());
        s.start();
    };

    private static class ExampleService extends Service<Void> {
        double value1,value2;
        public double getValue1() {
            return value1;
        }

        public void setValue1(double value1) {
            this.value1 = value1;
        }

        public double getValue2() {
            return value2;
        }

        public void setValue2(double value2) {
            this.value2 = value2;
        }

        @Override
        protected Task<Void> createTask() {
            return new Task() {
                final double v1 = value1;
                final double v2 = value2;
                @Override
                protected Object call() throws Exception {
                    while(!isCancelled())
                        ExampleMethod(v1,v2); // I want this method to take arguments from UI elements at each iteration
                    return null;
                }
            };
        }
    }