gbc.gridwidth = GridBagConstraints.REMAINDER;
gbag.setConstraints(rateText, gbc);
gbc.gridwidth = GridBagConstraints.RELATIVE;
gbag.setConstraints(numPayLab, gbc);
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbag.setConstraints(numPayText, gbc);
gbc.gridwidth = GridBagConstraints.RELATIVE;
gbag.setConstraints(remBalLab, gbc);
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbag.setConstraints(remBalText, gbc);
gbc.anchor = GridBagConstraints.CENTER;
gbag.setConstraints(doIt, gbc);
// Add all the components.
add(heading);
add(orgPLab);
add(orgPText);
add(paymentLab);
add(paymentText);
add(numPayLab);
add(numPayText);
add(rateLab);
add(rateText);
add(remBalLab);
add(remBalText);
add(doIt);
// Register to receive action events.
orgPText.addActionListener(this);
numPayText.addActionListener(this);
rateText.addActionListener(this);
paymentText.addActionListener(this);
doIt.addActionListener(this);
// Create a number format.
nf = NumberFormat.getInstance();
nf.setMinimumFractionDigits(2);
nf.setMaximumFractionDigits(2);
}
/* User pressed Enter on a text field
or pressed Compute. Display the result if all
fields are completed. */
public void actionPerformed(ActionEvent ae) {
double result = 0.0;
String orgPStr = orgPText.getText();
String numPayStr = numPayText.getText();
String rateStr = rateText.getText();
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