public class HICalc
{
	//Define variable used to store actual temperature in degrees F.
	private int temperature;
	
	//Define variable used to store percentage relative humidity.
	private int humidity;
	
	//Define variable used to store computed heat index value.
	private long heatindex = 0;
	
	//Define constants used in heat index formula.
	//We don't have to define these, but makes it easier 
	//to check or change formula.
	private static final double A1 = -42.379;
	private static final double A2 = 2.04901523;
	private static final double A3 = 10.14333127;
	private static final double A4 = 0.22475541;
	private static final double A5 = 0.00683783;
	private static final double A6 = 0.05481717;
	private static final double A7 = 0.00122874;
	private static final double A8 = 0.00085282;
	private static final double A9 = 0.00000199;

    /******** Constructor Methods ********/
    
    //Construct a heat index calculator object
    public HICalc() {
      //Set temperature to default
      temperature = 80;
      
      //Set humidity to default
      humidity = 0;
    }
    
    /******** Accessor Methods ********/
    //Accessor method to retrieve temperature
    public int getTemp(){
        return temperature;
    }
    
    //Accessor method to retrieve humidity
    public double getHumid() {
        return humidity;
    }
    
    /******** Mutator Methods ********/
    //Mutator method to set temperature
    public void setTemp(int inTemp) {
        if ((inTemp < 80) || (inTemp > 110))
          throw new IllegalArgumentException("The temperature you entered, " +
                 inTemp + ", is out of range for this heat index calculator. " );
        
        temperature = inTemp;
   }
   
   //Mutator method to set humidity
   public void setHumid(int inHum) {
       if((inHum < 0)||(inHum > 100))
         throw new IllegalArgumentException ("Humidity must be an integer" +
                              "between 0" + " and 100, inclusive, representing " +
                              "percentage relative " + " humidity.");
       
       humidity = inHum;
   }
   
   //Mutator method to compute heat index based on temperature and humidity
   public void computeHi() {
       double tempheatindex = ( A1 + ( A2 * temperature )
                       + (A3 * humidity)
                       - (A4 * temperature * humidity )
                       - (A5 * Math.pow (temperature, 2))
                       - (A6 * Math.pow (humidity, 2))
                       + (A7 * Math.pow (temperature, 2) * humidity)
                       + (A8 * temperature * Math.pow (humidity, 2))
                       - (A9 * Math.pow (temperature *humidity, 2)));
        heatindex = (Math.round ((100 * tempheatindex)/100));               
   }
   
   /******* Facilitator ("Helper" Methods) ********/
   //Facilitator method to provide warning associated with heat index categories.
   
   public String showWarning() {
   
     if (heatindex >= 130)
       return "This heat index value is in the category of Extreme Danger, " + 
              "with heat stroke or sunstroke likely for people in high risk groups.";
     else if ((heatindex >= 105) &&( heatindex <= 129))
       return "This heat index value is in the category of Danger, with sunstroke, " +
          "muscle cramps, and/or heat exhuastion likely. Heatstroke possible" +
          "with prolonged exposure and/or physical activity by people in high" +
          "risk groups.";
      else if ((heatindex >= 90) && (heatindex <= 104))
        return "This heat index value is in the category of Extreme Caution, with" +
          "sunstroke, muscle cramps, and/or heat exhuastion possible" +
          "with prolonged exposure and/or physical activity by people in high" +
          "risk groups.";
      else if ((heatindex >= 80) && (heatindex <= 89))
        return "This heat index value is in the category of Caution, with fatigue" +
          "possible with prolonged exposure and/or physicl activity by people "+
          "in high risk groups.";
      else return "No heat-related warning are associated with" +
          " this heat index level";
   }
   
   /******** toString Methods ********/
   //Returns a useful String representation of the heat index object
   public String toString() {
      return "The heat index for a temperature of " + temperature + 
          " degrees F" + " and relative humidity of " + humidity +
          "% is: " + heatindex + " degrees F";
      }
   
   }