Exchange rate calculator - Part 2/2
GUI
This week you will make GUI for the calculator and finally combine it with
the back end exchange rate retriever. You may choose whether you use AWT
or Swing components, both should be possible. However I will use Swing
in my suggestions.
Please note that Aftenposten is a registered trademark and that this
program is for educational purposes only.
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First you need to look at some GUI components and how they behave.
You need a JTextField and a JComboBox. Make small GUI application which lists your favorite artists or authors in the drop down list and displays the name you select in the JTextField.
TestGUI.java
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Now you will combine the exchange rate reader from last week with a
GUI shown bellow. Here is how it should work: You select the currency from
the JComboBox. When you type the amount in the JTextField for your local
currency, its value in the foreign currency is shown bellow, and vice versa.
Hint: JTextField.addKeyListener(...) and KeyListener.
ExchangeRateCalculator.java
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If you did not make a real time service last week, try to do so now.
Maybe you need a button trigger an update from the web page.
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You could also same the exchange rate information to disk and load
it when the program starts. In this way you would not need to stay online
all the time to have a update exchange rate calculator at your hands.
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