update 5/readme

Author: heracliteanflux

5_TemperatureConverterGUI/README.md

@@ -1,6 +1,121 @@
+### TemperatureConverterGUI
+
+#### Table of Contents
+1. [Execution at the command line](#execution-at-the-command-line)
+2. [`TemperatureConverter` Class](#temperatureconverter-class)
+3. [Requirements](#requirements)
+
+#### Execution at the command line
+
 ```
 javac TemperatureConverter.java &&
 java  TemperatureConverter
 ```
 ![](img/TemperatureConverter_0.png)
 ![](img/TemperatureConverter_1.png)
+
+#### `TemperatureConverter` Class
+
+```java
+import java.awt.Color;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.FlowLayout;
+import java.awt.Font;
+import java.awt.GridLayout;
+import javax.swing.ButtonGroup;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JRadioButton;
+import javax.swing.JTextField;
+import javax.swing.SwingConstants;
+
+public class TemperatureConverter extends JFrame {
+  private final ButtonGroup  radioGroup;
+  private final JButton      button;
+  private final JLabel       label1, label2, label3, label4, label5;
+  private final JPanel       panel1, panel2, panel3, panel4;
+  private final JRadioButton radioButton1, radioButton2;
+  private final JTextField   textField;
+
+  public TemperatureConverter () {
+    super("Temperature Converter");
+    setLayout(new GridLayout(5, 1, 0, 0));
+
+    label1 = new JLabel("Temperature Converter",             SwingConstants.CENTER);
+    label1.setForeground(Color.RED);
+    label1.setFont(new Font(label1.getFont().getName(), Font.PLAIN, 18));
+    label2 = new JLabel("Choose Conversion Type:",           SwingConstants.CENTER);
+    label3 = new JLabel("Enter the temperature to convert:", SwingConstants.CENTER);
+    label4 = new JLabel("The temperature converts to:",      SwingConstants.CENTER);
+    label5 = new JLabel("",                                  SwingConstants.CENTER);
+
+    radioGroup   = new ButtonGroup();
+    radioButton1 = new JRadioButton("Fahrenheit to Celsius");
+    radioButton1.setHorizontalAlignment(SwingConstants.CENTER);
+    radioButton2 = new JRadioButton("Celsius to Fahrenheit");
+    radioButton2.setHorizontalAlignment(SwingConstants.CENTER);
+    radioGroup.add(radioButton1);
+    radioGroup.add(radioButton2);
+
+    textField = new JTextField("", 4);
+    textField.setEditable(true);
+
+    ButtonHandler handler = new ButtonHandler();
+    button = new JButton("Convert Temperature");
+    button.addActionListener(handler);
+
+    panel1 = new JPanel(new GridLayout(3, 1, 0, 0));
+    panel1.add(label2);
+    panel1.add(radioButton1);
+    panel1.add(radioButton2);
+    panel2 = new JPanel();
+    panel2.add(label3);
+    panel2.add(textField);
+    panel3 = new JPanel();
+    panel3.add(label4);
+    panel3.add(label5);
+    panel4 = new JPanel(new FlowLayout());
+    panel4.add(button);
+
+    add(label1);
+    add(panel1);
+    add(panel2);
+    add(panel3);
+    add(panel4);
+  }
+
+  private class ButtonHandler implements ActionListener {
+    @Override
+    public void actionPerformed (ActionEvent e) {
+      if      (radioButton1.isSelected()) label5.setText(String.format("%.1f degrees Celsius",    (5.0 / 9) * (Double.parseDouble(textField.getText()) - 32)));
+      else if (radioButton2.isSelected()) label5.setText(String.format("%.1f degrees Fahrenheit", (9.0 / 5) *  Double.parseDouble(textField.getText()) + 32));
+    }
+  }
+
+  public static void main (String[] args) {
+    TemperatureConverter temperatureConverter = new TemperatureConverter();
+                         temperatureConverter.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+                         temperatureConverter.setSize(350, 300);
+                         temperatureConverter.setVisible(true);
+  }
+}
+```
+
+#### Requirements
+
+Write a GUI program, using the NetBeans GUI generator, that will convert temperatures from fahrenheit to celsius and from celsius to fahrenheit. The user should be able to enter a temperature to convert, click on a radio button to specify which conversion to do, and then click on a button to see the converted temperature displayed.
+
+Use the following formulas for the temperature conversions:
+
+`F = 9 / 5 * C + 32`
+
+and
+
+`C = 5 / 9 * (F - 32)`
+
+where F is the Fahrenheit temperature and C is the Celsius temperature.
+
+The temperatures should be displayed to 1 decimal place, e.g. 93.7 degrees Fahrenheit.

5_TemperatureConverterGUI/TemperatureConverter.java

@@ -82,4 +82,4 @@ public static void main (String[] args) {
                          temperatureConverter.setSize(350, 300);
                          temperatureConverter.setVisible(true);
   }
-}
+}