Write a Java GUI application to do temperature conversions between Celcius, Fahr

Question

Write a Java GUI application to do temperature conversions between Celcius, Fahranheit, and Kelvin. The GUIdisplay should look something like the following:

Your program must meet the following requirements:

1. Do not use any of the GUI editing capabilities of Eclipse for this assignment. Do all the GUI layout work based on what you have learned in class in the last 2 weeks.

2. The GUI and event handling setup should be done in the constructor of your GUI class or in private methods called from the constructor.

3. The display must have a label and JTextField where the user inputs a value which must appear in the upperpart of the frame as shown above.

4. There should be a set of 3 radio buttons which indicate the input scale of the value to be converted. The 3 input scale buttons must be vertically aligned on the left side of the display as shown above.

5. There should be a set of 3 radio buttons which indicate the output scale to be converted to. The 3 output scale buttons must be vertically aligned and appear on the right side of the display as shown above.

6. Event handling must be setup so that selection of any input or output button causes an event which triggers the event handling code to determine which of 9 possible conversions is needed.

7. Event handling must also respond to the user hitting the enter key in the input textfield!For this event, the event handling code must also determine which conversion is needed based on which buttons are selected.

8. Display the conversion result in an output text field or in a JLabel which appears in the bottom part of the display as shown above. Output the degree symbol and output scale information as shown above. You can output a degree symbol by putting the character value 176 into a formatted string.

9. If a radio button is clicked when there is nothing in the input textfield, the event handler must display the string

Explanation / Answer

follow ths

Enhance the temperature conversion program of foundhereby adding the Kelvin temperature
scale. The program should also allow the user to make conversions between any two scales.
Use the following formula for the conversion between Kelvin and Celsius (in addition to the formula
in Exercise 13.12):
Kelvin = Celsius + 273.15


// Program converts temperatures.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Convert extends JFrame {
private JPanel convertFrom, convertTo;
private JLabel label1, label2, label3, label4;
private JTextField temperature1, temperature2;
private ButtonGroup radioFrom, radioTo;
private JRadioButton celciusBoxTo, fahrenheitBoxTo,
kelvinBoxTo, celciusBoxFrom, fahrenheitBoxFrom, kelvinBoxFrom;

// set up GUI
public Convert()
{
super( "Temperature Conversion" );

fahrenheitBoxFrom = new JRadioButton( "Fahrenheit", true );
celciusBoxFrom = new JRadioButton( "Celcius", false );
kelvinBoxFrom = new JRadioButton( "Kelvin", false );
radioFrom = new ButtonGroup();
radioFrom.add( fahrenheitBoxFrom );
radioFrom.add( celciusBoxFrom );
radioFrom.add( kelvinBoxFrom );

fahrenheitBoxTo = new JRadioButton( "Fahrenheit", false );
celciusBoxTo = new JRadioButton( "Celcius", true );
kelvinBoxTo = new JRadioButton( "Kelvin", false );
radioTo = new ButtonGroup();
radioTo.add( fahrenheitBoxTo );
radioTo.add( celciusBoxTo );
radioTo.add( kelvinBoxTo );

convertFrom = new JPanel();
convertFrom.setLayout( new GridLayout( 1, 3 ) );
convertFrom.add( fahrenheitBoxFrom );
convertFrom.add( celciusBoxFrom );
convertFrom.add( kelvinBoxFrom );

convertTo = new JPanel();
convertTo.setLayout( new GridLayout( 1, 3 ) );
convertTo.add( fahrenheitBoxTo );
convertTo.add( celciusBoxTo );
convertTo.add( kelvinBoxTo );

label1 = new JLabel( "Convert from:" );
label2 = new JLabel( "Convert to:" );
label3 = new JLabel( "Enter Numeric Temperature: " );
label4 = new JLabel( "Comparable Temperature is: " );

temperature1 = new JTextField( 10 );
temperature1.addActionListener(

new ActionListener() { // anonymous inner class

// perform conversions
public void actionPerformed( ActionEvent event )
{
int convertTemp, temp;

temp = Integer.parseInt( ( ( JTextField )
event.getSource() ).getText() );

// fahrenheit to celcius
if ( fahrenheitBoxFrom.isSelected() &&
celciusBoxTo.isSelected() ) {
convertTemp = ( int ) ( 5.0f / 9.0f * ( temp - 32 ) );
temperature2.setText( String.valueOf( convertTemp ) );
}
// fahrenheit to kelvin
else if ( fahrenheitBoxFrom.isSelected() &&
kelvinBoxTo.isSelected() ) {
convertTemp = ( int )
( 5.0f / 9.0f * ( temp - 32 ) + 273 );
temperature2.setText( String.valueOf( convertTemp ) );
}

// celcius to fahrenheit
else if ( celciusBoxFrom.isSelected() &&
fahrenheitBoxTo.isSelected() ) {
convertTemp = ( int ) ( 9.0f / 5.0f * temp + 32 );
temperature2.setText( String.valueOf( convertTemp ) );
}

// celcius to kelvin
else if ( celciusBoxFrom.isSelected() &&
kelvinBoxTo.isSelected() ) {
convertTemp = temp + 273;
temperature2.setText( String.valueOf( convertTemp ) );
}

// kelvin to celcius
else if ( kelvinBoxFrom.isSelected() &&
celciusBoxTo.isSelected() ) {
convertTemp = temp - 273;
temperature2.setText( String.valueOf( convertTemp ) );
}

// kelvin to fahrenheit
else if ( kelvinBoxFrom.isSelected() &&
fahrenheitBoxTo.isSelected() ) {
convertTemp = ( int ) ( 5.0f /
9.0f * ( temp - 273 ) + 32 );
temperature2.setText( String.valueOf( convertTemp ) );
}

} // end method actionPerformed

} // end anonymous inner class

); // end call to addActionListener

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