/**
 * 
 */
package com.sensorcomponent.constants;

import java.util.Hashtable;
import java.util.Map;

import com.pi4j.io.gpio.GpioPinDigitalOutput;

/**
 * @author 
 *
 */
public class Constants {
	
	/*
	 * Stop Instantiation
	 */
	private Constants(){}
	
	public static final String HALL_SENSOR = "HALL_SENSOR";
	public static final String MSTRM_SENSOR = "MSTRM_SENSOR";
	public static final String GSTRM_SENSOR = "GSTRM_SENSOR";
	
}

/**
 * 
 */
package com.sensorcomponent.constants;

/**
 * @author 
 *
 */
public class Constants {
	
	/*
	 * Stop Instantiation
	 */
	private Constants(){}
	
	public static final String HALL_SENSOR = "HALL_SENSOR";
	public static final String MSTRM_SENSOR = "MSTRM_SENSOR";
	public static final String GSTRM_SENSOR = "GSTRM_SENSOR";
	
}

Update Constants.java