public void init() {
try {
SwingUtilities.invokeAndWait(new Runnable () {
public void run() {
makeGUI(); // initialize the GUI
}
});
} catch(Exception exc) {
System.out.println("Can't create because of "+ exc);
}
}
// Set up and initialize the GUI.
private void makeGUI() {
// Use a grid bag layout.
GridBagLayout gbag = new GridBagLayout();
GridBagConstraints gbc = new GridBagConstraints();
setLayout(gbag);
JLabel heading = new
JLabel("Initial Investment Needed for " +
"Future Value");
JLabel
targetLab = new JLabel("Desired Future Value ");
JLabel
periodLab = new JLabel("Years ");
JLabel
rateLab = new JLabel("Rate of Return ");
JLabel
compLab =
new JLabel("Compounding Periods per Year ");
JLabel initialLab =
new JLabel("Initial Investment Required ");
targetText = new JTextField(10);
periodText = new JTextField(10);
initialText = new JTextField(10);
rateText = new JTextField(10);
compText = new JTextField(10);
// Initial value field for display only.
initialText.setEditable(false);
doIt = new JButton("Compute");
// Define the grid bag.
gbc.weighty = 1.0; // use a row weight of 1
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.anchor = GridBagConstraints.NORTH;
gbag.setConstraints(heading, gbc);
// Anchor most components to the right.
gbc.anchor = GridBagConstraints.EAST;
gbc.gridwidth = GridBagConstraints.RELATIVE;
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