Java Program to Calculate Future Value of Investment

Fixed Deposit Program in Java:

Another popular financial calculation finds the future value of an investment given the initial investment, the rate of return, the number of compounding periods per year, and the number of years the investment is held.

To compute the future value, use the following formula:
Future Value = principal * ((rateOfRet / compPerYear) + 1) compPerYear * numYears

where

  • rateOfRet specifies the rate of return,
  • principal contains the initial value of the investment,
  • compPerYear specifies the number of compounding periods per year,
  • numYears specifies the length of the investment in years.

If you use an annualized rate of return for rateOfRet, then the number of compounding periods is 1.

Financial Application: Calculate Future Investment Value

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.text.*;
public class FutValue extends JApplet
implements ActionListener {
JTextField amountText, futvalText, periodText,
rateText, compText;
JButton doIt;
double principal;
double rateOfRet;
double numYears;
int compPerYear;
NumberFormat nf;
public void init() {
try {
SwingUtilities.invokeAndWait(new Runnable () {
public void run() {
makeGUI();
}
});
} catch(Exception exc) {
System.out.println("Can't create because of "+ exc);
}
}
private void makeGUI() {
GridBagLayout gbag = new GridBagLayout();
GridBagConstraints gbc = new GridBagConstraints();
setLayout(gbag);
JLabel heading = new
JLabel("Future Value of an Investment");
JLabel amountLab = new JLabel("Principal ");
JLabel periodLab = new JLabel("Years ");
JLabel rateLab = new JLabel("Rate of Return ");
JLabel futvalLab =
new JLabel("Future Value of Investment ");
JLabel compLab =
new JLabel("Compounding Periods per Year ");
amountText = new JTextField(10);
periodText = new JTextField(10);
futvalText = new JTextField(10);
rateText = new JTextField(10);
compText = new JTextField(10);
futvalText.setEditable(false);
doIt = new JButton("Compute");
gbc.weighty = 1.0;
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.anchor = GridBagConstraints.NORTH;
gbag.setConstraints(heading, gbc);
gbc.anchor = GridBagConstraints.EAST;
gbc.gridwidth = GridBagConstraints.RELATIVE;
gbag.setConstraints(amountLab, gbc);
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbag.setConstraints(amountText, gbc);
gbc.gridwidth = GridBagConstraints.RELATIVE;
gbag.setConstraints(periodLab, gbc);
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbag.setConstraints(periodText, gbc);
gbc.gridwidth = GridBagConstraints.RELATIVE;
gbag.setConstraints(rateLab, gbc);
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbag.setConstraints(rateText, gbc);
gbc.gridwidth = GridBagConstraints.RELATIVE;
gbag.setConstraints(compLab, gbc);
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbag.setConstraints(compText, gbc);
gbc.gridwidth = GridBagConstraints.RELATIVE;
gbag.setConstraints(futvalLab, gbc);
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbag.setConstraints(futvalText, gbc);
gbc.anchor = GridBagConstraints.CENTER;
gbag.setConstraints(doIt, gbc);
add(heading);
add(amountLab);
add(amountText);
add(periodLab);
add(periodText);
add(rateLab);
add(rateText);
add(compLab);
add(compText);
add(futvalLab);
add(futvalText);
add(doIt);
amountText.addActionListener(this);
periodText.addActionListener(this);
rateText.addActionListener(this);
compText.addActionListener(this);
doIt.addActionListener(this);
nf = NumberFormat.getInstance();
nf.setMinimumFractionDigits(2);
nf.setMaximumFractionDigits(2);
}
public void actionPerformed(ActionEvent ae) {
double result = 0.0;
String amountStr = amountText.getText();
String periodStr = periodText.getText();
String rateStr = rateText.getText();
String compStr = compText.getText();
try {
if(amountStr.length() != 0 &&
periodStr.length() != 0 &&
rateStr.length() != 0 &&
compStr.length() != 0) {
principal = Double.parseDouble(amountStr);
numYears = Double.parseDouble(periodStr);
rateOfRet = Double.parseDouble(rateStr) / 100;
compPerYear = Integer.parseInt(compStr);
result = compute();
futvalText.setText(nf.format(result));
}
showStatus("");
} catch (NumberFormatException exc) {
showStatus("Invalid Data");
futvalText.setText("");
}
}
double compute() {
double b, e;
b = (1 + rateOfRet/compPerYear);
e = compPerYear * numYears;
return principal * Math.pow(b, e);
}
}

Output:
Java Program to Calculate Future Value of Investment