}
}
// 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("Find Loan Balance ");
JLabel
orgPLab = new JLabel("Original Principal ");
JLabel
paymentLab = new JLabel("Amount of Payment ");
JLabel
numPayLab = new JLabel("Number of Payments Made ");
JLabel
rateLab = new JLabel("Interest Rate ");
JLabel
remBalLab = new JLabel("Remaining Balance ");
orgPText = new JTextField(10);
paymentText = new JTextField(10);
remBalText = new JTextField(10);
rateText = new JTextField(10);
numPayText = new JTextField(10);
// Payment field for display only.
remBalText.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;
gbag.setConstraints(orgPLab, gbc);
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbag.setConstraints(orgPText, gbc);
gbc.gridwidth = GridBagConstraints.RELATIVE;
gbag.setConstraints(paymentLab, gbc);
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbag.setConstraints(paymentText, gbc);
gbc.gridwidth = GridBagConstraints.RELATIVE;
gbag.setConstraints(rateLab, gbc);
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