Java The Complete Reference, Seventh Edition

// Find the remaining balance on a loan.

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import java.text.*;

/*

<applet code="RemBal" width=340 height=260>

</applet>

*/

public class RemBal extends JApplet

implements ActionListener {

JTextField orgPText, paymentText, remBalText,

rateText, numPayText;

JButton doIt;

double orgPrincipal; // original principal

double intRate; // interest rate

double payment; // amount of each payment

double numPayments; // number of payments made

/* Number of payments per year. You could

allow this value to be set by the user. */

final int payPerYear = 12;

NumberFormat nf;

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);

956 Part IV: Applying Java

FIGURE 32-6

TheRemBal

applet