COMP 274 Week 4 Lab Java Program to Convert Temperature
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COMP 274 Week 4 Lab Java Program to Convert Temperature
Write a Java GUI application to do temperature
conversions between Celcius, Fahranheit, and Kelvin. The GUI display should
look something like the following:
Your program must meet the following requirements:
- 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.
- The GUI and event handling setup should be done in the constructor
of your GUI class or in private methods called from the constructor.
- The display must have a label and JTextField where the user inputs
a value which must appear in the upper part of the frame as shown above.
- 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.
- 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.
- 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.
- 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.
- 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.
- If a radio button is clicked when there is nothing in the input textfield,
the event handler must display the string “No Input” in the output
textfield.
- Your program must accurately convert from Fahrenheit, Celcius,
Kelvin to Fahrenheit, Celcius, Kelvin. Only the selected conversion is
displayed in the output textfield.
- You must create a separate class which does all the temperature
conversion calculations. It should have 6 static methods, one for each
possible conversion. Each of the 6 methods takes an input temperature and
returns the appropriate converted temperature. This class could be used in
any other application where temperature conversion is needed. You can find
conversion formulas at the following website:
http://en.wikipedia.org/wiki/Temperature_conversion
- When the conversion selection changes due to
clicking either an input or output scale button, the output area must
change to show only the new result.
HINT:
- For radio button events, use the ItemListener interface and use the
isSelected method on the radio buttons to find out which buttons are
turned on.
- The output must display 2 digits after the decimal point.
- Make sure that you test all your conversion formulas and the error
case handling.
- Also make sure that you add comments to your
program.
Take screen shots of the program doing 2 different
conversions and handling one of the error cases.
Paste the
screen shots and the source code for your program into a Word document.
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