how to get my program to run

import java.util.Scanner; 

public class HeatIndexCalculator {
	    int currentTemp;
	    double currenHumidity;
	  	double heatIndex;
	    double calculatedHeatIndex;
		double c1 =     -42.379;
		double c2 =  2.04901523;
		double c3 = 10.14333127;
		double c4 =  -.22475541;
		double c5 =  -.00683783;
		double c6 =  -.05481717;
		double c7 =   .00122874;
		double c8 =  -.00085282;
		double c9 =  -.00000199;
		
		public double calculateHeatIndex(int currentTemp, double currentHumidity){
			double one;
			double two;
			double three;
			double four;
			one = c1+c2*currentTemp+c3*currentHumidity;
			two = c4*currentTemp*currentHumidity+c5*(currentTemp*currentTemp);
			three= c6*(currentHumidity*currentHumidity )+c7*(currentTemp*currentTemp)*currentHumidity;
			four = c8*currentTemp*(currentHumidity*currentHumidity)+c9*(currentTemp*currentTemp)*(currentHumidity*currentHumidity);
			heatIndex=+one+two+three+four;
			return heatIndex;
			
		}
		
		public void printHeatindex(int currentTemp, double currentHumidity,double calculatedHeatIndex){
			Scanner input = new Scanner (System.in);
			System.out.print("Please enter the current temperature in degrees fahrenheit");
			currentTemp=input.nextInt();
			System.out.println("please enter the current humidity as a percentage");
			currentHumidity=input.nextDouble();
		
			calculatedHeatIndex = calculateHeatIndex(currentTemp,currentHumidity);
			System.out.printf("At a temperature of %iF and a humidity of %d percent\n",currentTemp,currentHumidity);
			System.out.printf("It actually feels like:%dF",calculatedHeatIndex);
		
		input.close();
		}
		public void main(String[] arg, double currentHumidity, int currentTemp,double calculatedHeatIndex){
			calculateHeatIndex(currentTemp, currentHumidity);
			printHeatindex( currentTemp, currentHumidity,calculatedHeatIndex);
		}
		}