java applet

Question

YingKang 0 Light Poster

16 Years Ago

I am writing a java applet that calculate heat index and wind chill. it requires the user to input temperature , wind speed and humidity, and then let the user choose either Metric ( kph, °C) or English (mph, °F)

I have some problems with the code. First, the Calculate button doesn't work properly. Second, the sign of °C or °F don't appear on the first line on the right side of "Enter Temperature: " and on the right sde of "Wind Chill: ".

if you run the program , you will understand what I mean.

here is my code. I hope someone would be able to help me here. thank you

import java.text.DecimalFormat;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class WeatherPanel extends JPanel
{
	DecimalFormat fmt = new DecimalFormat("0.##");
	private static final long serialVersionUID = 1L;

	public static final int INT_PANEL_WIDTH = 500;

	public static final int INT_PANEL_HEIGHT = 300;	
	
	 JLabel jlTemperature;
	 JLabel jlWindSpeed;
	 JLabel jlHumidity;
	 JLabel jlTemperatureUnit;
	 JLabel jlWindSpeedUnit;
	 JLabel jlPercent;
	 
	 JLabel jlWindChill;
	 JLabel jlWindChillResult;
	 JLabel jlHeatIndex;
	 JLabel jlHeatIndexResult;	 
	  JTextField jtfTemperature;
	 JTextField jtfWindSpeed;
	 JTextField jtfHumidity;
	 JButton jbCalculate;
	 JButton jbClear;
	 JRadioButton jrbMetric;
	 JRadioButton jrbEnglish;
	 JPanel jpTemperatureResult;
	 JPanel jpWindSpeedResult;
	 JPanel jpHumidityResult;
	 JPanel jpButton;
	 JPanel jpRadioButton;
	 JPanel jpResult;
	 
	 public WeatherPanel()
	 {
		 jlTemperature = new JLabel("Enter Temperature: ");
		 jlWindSpeed = new JLabel("Enter Wind Speed: ");
		 jlHumidity = new JLabel("Enter Humidity: ");
		 jlPercent = new JLabel("%");
		 jlTemperatureUnit = new JLabel("°F");
		 jlWindSpeedUnit = new JLabel("MPH");		
		 jbCalculate = new JButton("Calculate!");
		 jbClear = new JButton("Clear");
		 jrbMetric = new JRadioButton("Metric");
		 jrbEnglish = new JRadioButton("English", true);
		 jtfTemperature = new JTextField(5);
		 jtfWindSpeed = new JTextField(5);
		 jtfHumidity = new JTextField(5);
		 jlWindChill = new JLabel("Wind Chill: ");
		 jlWindChillResult = new JLabel();
		 jlHeatIndex = new JLabel("Heat Index: ");
		 jlHeatIndexResult = new JLabel();
				 
		 jpTemperatureResult = new JPanel();
		 jpWindSpeedResult = new JPanel();
		 jpHumidityResult = new JPanel();	
		 jpButton = new JPanel();
		 jpRadioButton = new JPanel();
		 jpResult = new JPanel();		 
		 
		 ButtonGroup group = new ButtonGroup();
		 group.add(jrbMetric);
		 group.add(jrbEnglish);	
		 
		 WeatherListener listener = new WeatherListener();
		
		 jrbMetric.addActionListener(listener);
		 jrbEnglish.addActionListener(listener);
		 jtfTemperature.addActionListener(listener);
		 jtfWindSpeed.addActionListener(listener);
		 jtfHumidity.addActionListener(listener); 
		 jbCalculate.addActionListener(listener);
		 jbClear.addActionListener(listener);
		 
		 jpTemperatureResult.add(jlTemperature);
		 jpTemperatureResult.add(jtfTemperature);
		 jpTemperatureResult.add(jlTemperatureUnit);
		 jpWindSpeedResult.add(jlWindSpeed);
		 jpWindSpeedResult.add(jtfWindSpeed);
		 jpWindSpeedResult.add(jlWindSpeedUnit);
		 jpHumidityResult.add(jlHumidity);
		 jpHumidityResult.add(jtfHumidity);
		 jpHumidityResult.add(jlPercent);		 
		 jpRadioButton.add( jrbMetric);
		 jpRadioButton.add( jrbEnglish);
		 jpButton.add(jbCalculate);
		 jpButton.add(jbClear);
		 jpResult.add(jlWindChill);
		 jpResult.add(jlWindChillResult);
		 jpResult.add(jlTemperatureUnit);
		 jpResult.add(jlHeatIndex);
		 jpResult.add(jlHeatIndexResult);
		 jpResult.add(jlTemperatureUnit);		
		
		 
		 Weather WeatherObj = new Weather();		
		 WeatherObj.getTemperature();		
		 WeatherObj.getRelativeHumidity();		
		 WeatherObj.getWindSpeed();
		 
		 jlWindChillResult.setText(fmt.format(WeatherObj.windChill()));
	     jlHeatIndexResult.setText(fmt.format(WeatherObj.heatIndex())); 		 	 
		 jtfTemperature.setText(fmt.format( WeatherObj.getTemperature()));
		 jtfWindSpeed.setText(fmt.format(WeatherObj.getWindSpeed()));
		 jtfHumidity.setText(fmt.format(WeatherObj.getRelativeHumidity()));		 
				 
		 setLayout(new GridLayout(6,1));
		 add(jpTemperatureResult);
		 add(jpWindSpeedResult);
		 add(jpHumidityResult);
		 add(jpRadioButton);
		 add(jpButton);
		 add(jpResult);		 
		 
		setPreferredSize(new Dimension( INT_PANEL_WIDTH, INT_PANEL_HEIGHT));		
	 }	 

	 private class WeatherListener implements ActionListener
	 {
		 public void actionPerformed ( ActionEvent event)
		 {			 			
			 double dblTemperature;
			 double dblHumidity;
			 double dblWindSpeed;
			 			 
			 String strTemperature;
			 String strWindSpeed;
			 String strHumidity;			 	 	
			 
			
			strTemperature = jtfTemperature.getText();
			strWindSpeed = jtfWindSpeed.getText();
			strHumidity = jtfHumidity.getText();
			
			dblTemperature = Double.parseDouble(strTemperature);
			dblHumidity = Double.parseDouble(strHumidity);
			dblWindSpeed = Double.parseDouble(strWindSpeed);
			
			Object objSource = event.getSource();
			
			Weather WeatherObj1 = new Weather(false,dblTemperature, dblHumidity, dblWindSpeed);		

			
			jlWindChillResult.setText(fmt.format(WeatherObj1.windChill()));
			jlHeatIndexResult.setText(fmt.format(WeatherObj1.heatIndex()));
			
						
			
			if(objSource == jrbMetric)
			{
				Weather WeatherObj2 = new Weather(true,dblTemperature, dblHumidity, dblWindSpeed);		
				WeatherObj2.setUnits(true);
				WeatherObj2.getUnits();
				jlTemperatureUnit.setText("°C");
				jlWindSpeedUnit.setText("Kph");				
			
				jtfTemperature.setText(fmt.format(Weather.fahrenheitToCelsius(dblTemperature)));
				jtfWindSpeed.setText(fmt.format(dblWindSpeed*1.609));				
							
				jlWindChillResult.setText(fmt.format(WeatherObj2.windChill()));
				jlHeatIndexResult.setText(fmt.format(WeatherObj2.heatIndex()));
				
				
			}
			else if(objSource == jrbEnglish)
			{
				Weather WeatherObj2 = new Weather(false,dblTemperature, dblHumidity, dblWindSpeed);	
				WeatherObj2.setUnits(false);
				WeatherObj2.getUnits();
				jlTemperatureUnit.setText("°F");
				jlWindSpeedUnit.setText("MPH");				
			
				jtfTemperature.setText(fmt.format(Weather.celsiusToFahrenheit(dblTemperature)));
				jtfWindSpeed.setText(fmt.format(dblWindSpeed/1.609));
				jlWindChillResult.setText(fmt.format(WeatherObj2.windChill()));
				jlHeatIndexResult.setText(fmt.format(WeatherObj2.heatIndex()));				
			
			}
			
			if(event.getSource() == jbClear)
			{
				jtfTemperature.setText("");
				jtfWindSpeed.setText("");	
				jtfHumidity.setText("");
				jlWindChillResult.setText("");
				jlHeatIndexResult.setText("");
				
			}
			
			if(event.getSource()== jbCalculate  )
			{
				strTemperature = jtfTemperature.getText();
				strWindSpeed = jtfWindSpeed.getText();
				strHumidity = jtfHumidity.getText();
				
				dblTemperature = Double.parseDouble(strTemperature);
				dblHumidity = Double.parseDouble(strHumidity);
				dblWindSpeed = Double.parseDouble(strWindSpeed);
				if(objSource == jrbEnglish)
				{
					Weather WeatherObj3 = new Weather (false,dblTemperature, dblHumidity, dblWindSpeed);									
					WeatherObj3.setUnits(false);
					WeatherObj3.getUnits();	
					jlWindChillResult.setText(fmt.format(WeatherObj3.windChill()));
					jlHeatIndexResult.setText(fmt.format(WeatherObj3.heatIndex()));							
				}
				else if(objSource == jrbMetric)
				{
					Weather WeatherObj3 = new Weather (true,dblTemperature, dblHumidity, dblWindSpeed);									
					WeatherObj3.setUnits(true);
					WeatherObj3.getUnits();	
					jlWindChillResult.setText(fmt.format(WeatherObj3.windChill()));
					jlHeatIndexResult.setText(fmt.format(WeatherObj3.heatIndex()));							
				}					
			}		
			
					 
	    }//public void actionPerformed 
		 
		 
	}// private class WeatherListener
	 
	

}//public class WeatherPanel 

public class Weather
{
	boolean blnUnits;
	double dblTemperature;
	double dblWindSpeed;
	double dblRelativeHumidity;
	
	public static double celsiusToFahrenheit( double dblCelsiusIn )
	{
		double dblFahrenheit;	
		dblFahrenheit = (double)9/5 * dblCelsiusIn + 32;		
		return dblFahrenheit;
	}
	
	public static double fahrenheitToCelsius( double dblFahrenheitIn )
	{
		double dblCelsius;
		dblCelsius = (double)5/9 * (dblFahrenheitIn - 32);
		return dblCelsius; 
	}
	
	//Constructors
	public Weather( )
	{
		blnUnits = false;
		dblTemperature = 70;
		dblWindSpeed = 5;
		dblRelativeHumidity = 50;
	}
	
	public Weather( boolean blnUnitsIn,
            double  dblTemperatureIn,
            double  dblRelativeHumidityIn,
            double  dblWindSpeedIn
          )
	{
		blnUnits = blnUnitsIn;
		dblTemperature = dblTemperatureIn;
		dblWindSpeed = dblWindSpeedIn;
		dblRelativeHumidity = dblRelativeHumidityIn;
	}
	
	public boolean getUnits()
	{
		return blnUnits;
	}
	
	public void setUnits( boolean blnUnitsIn )
	{
		blnUnits = blnUnitsIn;
		if(blnUnits == true)
		{
			dblTemperature = fahrenheitToCelsius(dblTemperature);
			dblWindSpeed = dblWindSpeed * 1.609;
		}
		if(blnUnits == false)
		{
			dblTemperature = celsiusToFahrenheit(dblTemperature);
			dblWindSpeed = dblWindSpeed / 1.609;
		}
		
	
		// if the Units have changed, must convert the Temperature and Wind Speed to the proper values. 
	}
	
	public double getTemperature()
	{
		return dblTemperature;
	}
	
	public void setTemperature( double dblTemperatureIn )
	{
		dblTemperature = dblTemperatureIn;
	}
	
	public double getRelativeHumidity()
	{
		return dblRelativeHumidity;
	}
	
	public void setRelativeHumidity( double dblRelativeHumidityIn )
	{
		dblRelativeHumidity = dblRelativeHumidityIn;
	}
	
	public double getWindSpeed()
	{
		return dblWindSpeed;
	}
	
	public void setWindSpeed( double dblWindSpeedIn )
	{
		dblWindSpeed = dblWindSpeedIn;
	}
	
	public String temperatureUnits()
	{
		if(blnUnits = false)
			return "°F";
		else 
			return "°C";
	}
	
	public String speedUnits()
	{
		if(blnUnits = false)
			return "MPH";
		else 
			return "Kph";
	}
	
	public double windChill()
	{
		double dblWindChillTemperature;
		double dblTemperatureTemp;
		if(blnUnits == false)
		{
			dblWindChillTemperature = 35.74 + 0.6125 * dblTemperature - 35.75 * dblWindSpeed * 0.16 + 0.4275 * dblTemperature * dblWindSpeed * 0.16;
			return dblWindChillTemperature;
		}
		else
		{
			dblTemperatureTemp =  celsiusToFahrenheit(dblTemperature);
			dblWindChillTemperature = 35.74 + 0.6125 * dblTemperatureTemp - 35.75 * dblWindSpeed * 0.16 + 0.4275 * dblTemperatureTemp * dblWindSpeed * 0.16;
			dblWindChillTemperature = fahrenheitToCelsius(dblWindChillTemperature);
			return dblWindChillTemperature;
		}
	}	
	public double heatIndex()
	{
		double dblHeatIndex;
		double dblTemperatureTemp;
		if(blnUnits == false)
		{
			dblHeatIndex = -42.379 + 2.04901523 * dblTemperature + 10.14333127 * dblRelativeHumidity - 0.22475541 * dblTemperature * dblRelativeHumidity
							- 0.00683783 * dblTemperature * dblTemperature - 0.05481717 * dblRelativeHumidity * dblRelativeHumidity + 0.00122874 * dblTemperature
							* dblTemperature * dblRelativeHumidity + 0.00085282 * dblTemperature * dblRelativeHumidity * dblRelativeHumidity - 0.00000199 
							* dblTemperature * dblTemperature * dblRelativeHumidity * dblRelativeHumidity;
			return dblHeatIndex;				
		}
		else
		{
			dblTemperatureTemp = celsiusToFahrenheit(dblTemperature);
			
			dblHeatIndex = -42.379 + 2.04901523 * dblTemperatureTemp + 10.14333127 * dblRelativeHumidity - 0.22475541 * dblTemperatureTemp * dblRelativeHumidity
			- 0.00683783 * dblTemperatureTemp * dblTemperatureTemp - 0.05481717 * dblRelativeHumidity * dblRelativeHumidity + 0.00122874 * dblTemperatureTemp
			* dblTemperatureTemp * dblRelativeHumidity + 0.00085282 * dblTemperatureTemp * dblRelativeHumidity * dblRelativeHumidity - 0.00000199 
			* dblTemperatureTemp * dblTemperatureTemp * dblRelativeHumidity * dblRelativeHumidity;
			
			dblHeatIndex = fahrenheitToCelsius(dblHeatIndex);
			
			return dblHeatIndex;			
		}
	}
	
	public String toString()
	{
		return "Wind Chill: " + windChill() + " " + temperatureUnits() + "   Heat Index: " + heatIndex() + " " + temperatureUnits();

	}		

}

import java.awt.Dimension;


import javax.swing.*;


public 	class		WeatherCalc
				extends	JApplet
{

	private static final long	serialVersionUID	= 1L;

	private static final String	STR_FRAME_TITLE = "DPR205 - Weather Calculator";

		private	static				WeatherPanel spnlWeather;
	
	public static void main( String[] args )
  {
        JFrame jfWeather;

    WeatherPanel spnlWeather;

    
    jfWeather = new JFrame( STR_FRAME_TITLE );
    jfWeather.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );

    spnlWeather = new WeatherPanel();

    jfWeather.getContentPane().add( spnlWeather );
    jfWeather.pack();
    jfWeather.setVisible( true );

    return;

  } 
	public	void	init()
	{
    WeatherCalc.spnlWeather = new WeatherPanel();
    this.resize( new Dimension(	WeatherPanel.INT_PANEL_WIDTH,
    														WeatherPanel.INT_PANEL_HEIGHT
    													)
    					 );
    return;
	}	//	public	void	init()

	public	void	start()
	{
    this.add( WeatherCalc.spnlWeather );

    return;
	}	//	public	void	start()

} // public class WeatherCalc

java:swing

Edited 16 Years Ago by YingKang because: n/a

1 Contributor
1 Reply
134 Views
2 Days Discussion Span
Latest Post 16 Years Ago Latest Post by YingKang

Dani AI

Generated 9 Months Ago

The immediate symptom (heat index correct for the default values but wrong after editing inputs) points to unit-conversion/ordering problems rather than the heat-index formula itself. fixed the earlier temperature-units bug, but the code still mixes two conversion strategies: (a) converting numbers in the UI, and (b) converting numbers inside the Weather object via setUnits. That mixture — plus calling setUnits unconditionally — causes values to be converted more than once or interpreted in the wrong units.

Two concrete issues to address:

Weather.setUnits currently assigns the unit flag and then always converts the stored numbers. If you call new Weather(true, ...) and then setUnits(true) you will convert the same numeric value again. Guard setUnits so it only converts when the unit actually changes.
In the panel listener you parse text fields at the top of actionPerformed for every event. Parse only when you need the numbers (for Calculate), and wrap parsing in a try/catch to handle bad input. Check event.getSource first (clear, radio change, calculate) to avoid parsing empty strings.

Small, safe change for setUnits (illustrative):

public void setUnits(boolean unitsIn) {
    if (unitsIn == blnUnits) return; // no change, avoid double conversion
    if (unitsIn) {
        dblTemperature = fahrenheitToCelsius(dblTemperature);
        dblWindSpeed *= 1.60934;
    } else {
        dblTemperature = celsiusToFahrenheit(dblTemperature);
        dblWindSpeed /= 1.60934;
    }
    blnUnits = unitsIn;
}

Practical recipe: decide one contract and stick to it. Either (A) constructor expects values in the units given by the units flag and you never call setUnits after construction, or (B) constructor always expects a fixed base unit (say F and mph) and you call setUnits(true) only to convert to metric. Apply the same rule consistently in the radio-button handler and Calculate button. Add input validation (NumberFormatException handling) and test a few known cases to confirm the heat-index outputs.

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YingKang 0 Light Poster · Answer 1 · 2009-12-08T06:26:35+00:00

The problems I mentioned earlier are solved . However, I have encountered another one. When the user enter some information, the answer for heat index is not correct. actually the first time I run he code with the default input, the heat index is correct, but after I change some input, the heat index is not correct any more. Where is my problem? Can anyone help please? Thanks

package gui;


import java.text.DecimalFormat;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

import application.Weather;

public class WeatherPanel extends JPanel
{
    DecimalFormat fmt = new DecimalFormat("0.##");
    private static final long serialVersionUID = 1L;

    public static final int INT_PANEL_WIDTH = 500;

    public static final int INT_PANEL_HEIGHT = 300;    
    
     JLabel jlTemperature;
     JLabel jlWindSpeed;
     JLabel jlHumidity;
     JLabel jlTemperatureUnit1;
     JLabel jlTemperatureUnit2;
     JLabel jlTemperatureUnit3;
     JLabel jlWindSpeedUnit;
     JLabel jlPercent;
     
     JLabel jlWindChill;
     JLabel jlWindChillResult;
     JLabel jlHeatIndex;
     JLabel jlHeatIndexResult;     
     JTextField jtfTemperature;
     JTextField jtfWindSpeed;
     JTextField jtfHumidity;
     JButton jbCalculate;
     JButton jbClear;
     JRadioButton jrbMetric;
     JRadioButton jrbEnglish;
     JPanel jpTemperatureResult;
     JPanel jpWindSpeedResult;
     JPanel jpHumidityResult;
     JPanel jpButton;
     JPanel jpRadioButton;
     JPanel jpResult;
     
     public WeatherPanel()
     {
         jlTemperature = new JLabel("Enter Temperature: ");
         jlWindSpeed = new JLabel("Enter Wind Speed: ");
         jlHumidity = new JLabel("Enter Humidity: ");
         jlPercent = new JLabel("%");
         jlTemperatureUnit1 = new JLabel("°F");
         jlTemperatureUnit2 = new JLabel("°F");
         jlTemperatureUnit3 = new JLabel("°F");
         jlWindSpeedUnit = new JLabel("MPH");        
         jbCalculate = new JButton("Calculate!");
         jbClear = new JButton("Clear");
         jrbMetric = new JRadioButton("Metric");
         jrbEnglish = new JRadioButton("English", true);
         jtfTemperature = new JTextField(5);
         jtfWindSpeed = new JTextField(5);
         jtfHumidity = new JTextField(5);
         jlWindChill = new JLabel("Wind Chill: ");
         jlWindChillResult = new JLabel();
         jlHeatIndex = new JLabel("Heat Index: ");
         jlHeatIndexResult = new JLabel();
                 
         jpTemperatureResult = new JPanel();
         jpWindSpeedResult = new JPanel();
         jpHumidityResult = new JPanel();    
         jpButton = new JPanel();
         jpRadioButton = new JPanel();
         jpResult = new JPanel();         
         
         ButtonGroup group = new ButtonGroup();
         group.add(jrbMetric);
         group.add(jrbEnglish);                     
         
         WeatherListener listener = new WeatherListener();
        
         jrbMetric.addActionListener(listener);
         jrbEnglish.addActionListener(listener);
         jtfTemperature.addActionListener(listener);
         jtfWindSpeed.addActionListener(listener);
         jtfHumidity.addActionListener(listener); 
         jbCalculate.addActionListener(listener);
         jbClear.addActionListener(listener);
         
         jpTemperatureResult.add(jlTemperature);
         jpTemperatureResult.add(jtfTemperature);
         jpTemperatureResult.add(jlTemperatureUnit1);
         jpWindSpeedResult.add(jlWindSpeed);
         jpWindSpeedResult.add(jtfWindSpeed);
         jpWindSpeedResult.add(jlWindSpeedUnit);
         jpHumidityResult.add(jlHumidity);
         jpHumidityResult.add(jtfHumidity);
         jpHumidityResult.add(jlPercent);         
         jpRadioButton.add( jrbMetric);
         jpRadioButton.add( jrbEnglish);
         jpButton.add(jbCalculate);
         jpButton.add(jbClear);
         jpResult.add(jlWindChill);
         jpResult.add(jlWindChillResult);
         jpResult.add(jlTemperatureUnit2);
         jpResult.add(jlHeatIndex);
         jpResult.add(jlHeatIndexResult);
         jpResult.add(jlTemperatureUnit3);        
        
         
         Weather WeatherObj = new Weather();        
         WeatherObj.getTemperature();    
         WeatherObj.getRelativeHumidity();        
         WeatherObj.getWindSpeed();
         
         jlWindChillResult.setText(fmt.format(WeatherObj.windChill()));
         jlHeatIndexResult.setText(fmt.format(WeatherObj.heatIndex()));               
         jtfTemperature.setText(fmt.format( WeatherObj.getTemperature()));
         jtfWindSpeed.setText(fmt.format(WeatherObj.getWindSpeed()));
         jtfHumidity.setText(fmt.format(WeatherObj.getRelativeHumidity()));         
                 
         setLayout(new GridLayout(6,1));
         add(jpTemperatureResult);
         add(jpWindSpeedResult);
         add(jpHumidityResult);
         add(jpRadioButton);
         add(jpButton);
         add(jpResult);         
         
        setPreferredSize(new Dimension( INT_PANEL_WIDTH, INT_PANEL_HEIGHT));        
     }     

     private class WeatherListener implements ActionListener
     {
         public void actionPerformed ( ActionEvent event)
         {                         
             double dblTemperature;
             double dblHumidity;
             double dblWindSpeed;
        
             
             String strTemperature;
             String strWindSpeed;
             String strHumidity;                      
             
            
            strTemperature = jtfTemperature.getText();
            strWindSpeed = jtfWindSpeed.getText();
            strHumidity = jtfHumidity.getText();
            
            dblTemperature = Double.parseDouble(strTemperature);
            dblHumidity = Double.parseDouble(strHumidity);
            dblWindSpeed = Double.parseDouble(strWindSpeed);    
            
            
            if(jrbEnglish.isSelected())
            {
                Weather WeatherObj1 = new Weather(false,dblTemperature, dblHumidity, dblWindSpeed);        
                
                jlWindChillResult.setText(fmt.format(WeatherObj1.windChill()));
                jlHeatIndexResult.setText(fmt.format(WeatherObj1.heatIndex()));
            }    
            else if(jrbMetric.isSelected())
            {
                Weather WeatherObj1 = new Weather(true,dblTemperature, dblHumidity, dblWindSpeed);                    
            
                    
                jlWindChillResult.setText(fmt.format(WeatherObj1.windChill()));
                jlHeatIndexResult.setText(fmt.format(WeatherObj1.heatIndex()));
            }

            Object objSource = event.getSource();
            
            if(objSource == jrbMetric)
            {
                
                Weather WeatherObj2 = new Weather(true,dblTemperature, dblHumidity, dblWindSpeed);        
                WeatherObj2.setUnits(true);
                WeatherObj2.getUnits();    
                jlTemperatureUnit1.setText(WeatherObj2.temperatureUnits());
                jlTemperatureUnit2.setText(WeatherObj2.temperatureUnits());
                jlTemperatureUnit3.setText(WeatherObj2.temperatureUnits());
                jlWindSpeedUnit.setText(WeatherObj2.speedUnits());    
            
                jtfTemperature.setText(fmt.format(Weather.fahrenheitToCelsius(dblTemperature)));
                jtfWindSpeed.setText(fmt.format(dblWindSpeed*1.61));                
                            
                jlWindChillResult.setText(fmt.format(WeatherObj2.windChill()));
                jlHeatIndexResult.setText(fmt.format(WeatherObj2.heatIndex()));
                            
            }            
            else if(objSource == jrbEnglish)
            {
                
                Weather WeatherObj2 = new Weather(false,dblTemperature, dblHumidity, dblWindSpeed);    
                WeatherObj2.setUnits(false);
                WeatherObj2.getUnits();        
            
                jlTemperatureUnit1.setText(WeatherObj2.temperatureUnits());
                jlTemperatureUnit2.setText(WeatherObj2.temperatureUnits());
                jlTemperatureUnit3.setText(WeatherObj2.temperatureUnits());
                jlWindSpeedUnit.setText(WeatherObj2.speedUnits());
                
                jtfTemperature.setText(fmt.format(Weather.celsiusToFahrenheit(dblTemperature)));
                jtfWindSpeed.setText(fmt.format(dblWindSpeed/1.61));
                jlWindChillResult.setText(fmt.format(WeatherObj2.windChill()));
                jlHeatIndexResult.setText(fmt.format(WeatherObj2.heatIndex()));        
            
            }
            
            
            if(event.getSource() == jbClear)
            {
                jtfTemperature.setText("");
                jtfWindSpeed.setText("");    
                jtfHumidity.setText("");
                jlWindChillResult.setText("");
                jlHeatIndexResult.setText("");                            
            }
            
            if(event.getSource()== jbCalculate  )
            {
                strTemperature = jtfTemperature.getText();
                strWindSpeed = jtfWindSpeed.getText();
                strHumidity = jtfHumidity.getText();
                
                dblTemperature = Double.parseDouble(strTemperature);
                dblHumidity = Double.parseDouble(strHumidity);
                dblWindSpeed = Double.parseDouble(strWindSpeed);                
            
                if( jrbEnglish.isSelected())
                {
                    Weather WeatherObj3 = new Weather (false,dblTemperature, dblHumidity, dblWindSpeed);                    
                            
                    jlWindChillResult.setText(fmt.format(WeatherObj3.windChill()));
                    jlHeatIndexResult.setText(fmt.format(WeatherObj3.heatIndex()));                            
                }
                else if(jrbMetric.isSelected())
                {
                    Weather WeatherObj3 = new Weather (true,dblTemperature, dblHumidity, dblWindSpeed);                    
                
                    jlWindChillResult.setText(fmt.format(WeatherObj3.windChill()));
                    jlHeatIndexResult.setText(fmt.format(WeatherObj3.heatIndex()));                            
                }                    
            }        
                                 
        }//public void actionPerformed          
         
    }// private class WeatherListener 
    
}//public class WeatherPanel 

package application;



public class Weather
{
    boolean blnUnits;
    double dblTemperature;
    double dblWindSpeed;
    double dblRelativeHumidity;
    
    public static double celsiusToFahrenheit( double dblCelsiusIn )
    {
        double dblFahrenheit;    
        dblFahrenheit = (double)9/5 * dblCelsiusIn + 32;    
        return dblFahrenheit;
    }
    
    public static double fahrenheitToCelsius( double dblFahrenheitIn )
    {
        double dblCelsius;
        dblCelsius = (double)5/9 * (dblFahrenheitIn - 32);
        return dblCelsius; 
    }
    
    //Constructors
    public Weather( )
    {
        blnUnits = false;
        dblTemperature = 70;
        dblWindSpeed = 5;
        dblRelativeHumidity = 50;
    }
    
    public Weather( boolean blnUnitsIn,
            double  dblTemperatureIn,
            double  dblRelativeHumidityIn,
            double  dblWindSpeedIn
          )
    {
        blnUnits = blnUnitsIn;
        dblTemperature = dblTemperatureIn;
        dblWindSpeed = dblWindSpeedIn;
        dblRelativeHumidity = dblRelativeHumidityIn;
    }
    
    public boolean getUnits()
    {
        return blnUnits;
    }
    
    public void setUnits( boolean blnUnitsIn )
    {
        blnUnits = blnUnitsIn;
        if(blnUnits == true)
        {
            dblTemperature = fahrenheitToCelsius(dblTemperature);
            dblWindSpeed = dblWindSpeed * 1.61;
        }
        if(blnUnits == false)
        {
            dblTemperature = celsiusToFahrenheit(dblTemperature);
            dblWindSpeed = dblWindSpeed / 1.61;
        }
        
    
        // if the Units have changed, must convert the Temperature and Wind Speed to the proper values. 
    }
    
    public double getTemperature()
    {
        return dblTemperature;
    }
    
    public void setTemperature( double dblTemperatureIn )
    {
        dblTemperature = dblTemperatureIn;
    }
    
    public double getRelativeHumidity()
    {
        return dblRelativeHumidity;
    }
    
    public void setRelativeHumidity( double dblRelativeHumidityIn )
    {
        dblRelativeHumidity = dblRelativeHumidityIn;
    }
    
    public double getWindSpeed()
    {
        return dblWindSpeed;
    }
    
    public void setWindSpeed( double dblWindSpeedIn )
    {
        dblWindSpeed = dblWindSpeedIn;
    }
    
    public String temperatureUnits()
    {
        if(blnUnits == false)
            return "°F";
        else 
            return "°C";
    }
    
    public String speedUnits()
    {
        if(blnUnits == false)
            return "MPH";
        else 
            return "Kph";
    }
    
    public double windChill()
    {
        double dblWindChillTemperature;
        double dblTemperatureTemp;
        double dblWindSpeedTemp;
        
        if(blnUnits == false)
        {
            dblWindChillTemperature = 35.74 + 0.6215 * dblTemperature - 35.75 * Math.pow(dblWindSpeed,  0.16) + 0.4275 * dblTemperature * Math.pow(dblWindSpeed,0.16);
            return dblWindChillTemperature;
        }


        else
        {
            dblTemperatureTemp =  celsiusToFahrenheit(dblTemperature);
            dblWindSpeedTemp = dblWindSpeed / 1.61; 
            dblWindChillTemperature = 35.74 + 0.6215 * dblTemperatureTemp - 35.75 * Math.pow(dblWindSpeedTemp , 0.16) + 0.4275 * dblTemperatureTemp * Math.pow(dblWindSpeedTemp,0.16);
            dblWindChillTemperature = fahrenheitToCelsius(dblWindChillTemperature);
            return dblWindChillTemperature;
        }
    }    
    public double heatIndex()
    {
        double dblHeatIndex;
        double dblTemperatureTemp;
        if(blnUnits == false)
        {
            dblHeatIndex = -42.379 + 2.04901523 * dblTemperature + 10.14333127 * dblRelativeHumidity - 0.22475541 * dblTemperature * dblRelativeHumidity
                            - 0.00683783 * dblTemperature * dblTemperature - 0.05481717 * dblRelativeHumidity * dblRelativeHumidity + 0.00122874 * dblTemperature
                            * dblTemperature * dblRelativeHumidity + 0.00085282 * dblTemperature * dblRelativeHumidity * dblRelativeHumidity - 0.00000199 
                            * dblTemperature * dblTemperature * dblRelativeHumidity * dblRelativeHumidity;
            return dblHeatIndex;                
        }
        else
        {
            dblTemperatureTemp = celsiusToFahrenheit(dblTemperature);
            
            dblHeatIndex = -42.379 + 2.04901523 * dblTemperatureTemp + 10.14333127 * dblRelativeHumidity - 0.22475541 * dblTemperatureTemp * dblRelativeHumidity
            - 0.00683783 * dblTemperatureTemp * dblTemperatureTemp - 0.05481717 * dblRelativeHumidity * dblRelativeHumidity + 0.00122874 * dblTemperatureTemp
            * dblTemperatureTemp * dblRelativeHumidity + 0.00085282 * dblTemperatureTemp * dblRelativeHumidity * dblRelativeHumidity - 0.00000199 
            * dblTemperatureTemp * dblTemperatureTemp * dblRelativeHumidity * dblRelativeHumidity;
            
            dblHeatIndex = fahrenheitToCelsius(dblHeatIndex);
            
            return dblHeatIndex;            
        }
    }
    
    public String toString()
    {
        return "Wind Chill: " + windChill() + " " + temperatureUnits() + "   Heat Index: " + heatIndex() + " " + temperatureUnits();

    }        

}

package application;

import gui.WeatherPanel;

import java.awt.Dimension;

import javax.swing.*;


public     class        WeatherCalc
                extends    JApplet
{
        private static final long    serialVersionUID    = 1L;

    private static final String    STR_FRAME_TITLE = "DPR205 - Weather Calculator";

    //    Class  Variables:
    //    -----------------
    private    static                WeatherPanel spnlWeather;
    
    public static void main( String[] args )
  {
    //    Local Variables:
    //    ----------------
    JFrame jfWeather;

    WeatherPanel spnlWeather;

    //    Program Logic:
    //    --------------
    jfWeather = new JFrame( STR_FRAME_TITLE );
    jfWeather.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );

    spnlWeather = new WeatherPanel();

    jfWeather.getContentPane().add( spnlWeather );
    jfWeather.pack();
    jfWeather.setVisible( true );

    return;

  } // public static void main (String[] )

    public    void    init()
    {
    WeatherCalc.spnlWeather = new WeatherPanel();
    this.resize( new Dimension(    WeatherPanel.INT_PANEL_WIDTH,
                                                            WeatherPanel.INT_PANEL_HEIGHT
                                                        )
                         );
    return;
    }    //    public    void    init()

    public    void    start()
    {
    this.add( WeatherCalc.spnlWeather );

    return;
    }    //    public    void    start()

} // public class WeatherCalc