Tree mold pie controls lights

VCC=>3.3v GND=>ground IN=>GPIO 01 Normally open, the common terminal is a switch

import com.pi4j.io.gpio.GpioController;
import com.pi4j.io.gpio.GpioFactory;
import com.pi4j.io.gpio.GpioPinDigitalOutput;
import com.pi4j.io.gpio.PinState;
import com.pi4j.io.gpio.RaspiPin;
public class Test{
    public static void main(String args[]) throws InterruptedException {
        System.out.println("Hello World");
         // create a GPIO controller
        final GpioController gpio = GpioFactory.getInstance();

        // Get the No. 1 GPIO pin and set the high level state, which corresponds to the No. 12 pin on the Raspberry Pi. You can refer to the picture provided by pi4j.
        final GpioPinDigitalOutput pin = gpio.provisionDigitalOutputPin(RaspiPin.GPIO_01, "LED", PinState.HIGH);
        //final GpioPinDigitalOutput pin = gpio.provisionDigitalOutputPin(RaspiPin.GPIO_00, "REDLED", PinState.HIGH);

        while(true){
            //set high level
            pin.high();
            System.out.println("Turn off the light");
            // sleep for 1 second
               Thread.sleep(1000);
            //set low level
            pin.low();
            System.out.println("Turn on the light");
               Thread.sleep(1000);
            // switch state
            pin.toggle();
        }
    }
}