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Geekpedia » Java Code » Simple Interest Calculator Java Applet

Simple Interest Calculator Java Applet

A sample interest calculator, very basic in functionality, coded in Java and ready to be compiled and executed as a Java Applet.

On Friday, July 31st 2009 at 08:30 PM

By Andrew Pociu (View Profile)

(Rated 5 with 4 votes)

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import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.text.NumberFormat;
 
public class InterestCalculator extends Applet implements ActionListener 
{
        TextField textPresentVal = new TextField("0", 10);
        TextField textInterestRate = new TextField("0", 10);
        TextField textPeriods = new TextField("0", 10);
        Label lblPresentVal = new Label("Present Value");
        Label lblInterestRate = new Label("Interest Rate");
        Label lblPeriods = new Label("Number of Periods");
        Label lblFutureVal = new Label("Future Value:");
        Button btnOk = new Button("Calculate");
 
        public void init()
        {
 
                add(lblPresentVal);
                add(textPresentVal);
                add(lblInterestRate);
                add(textInterestRate);
                add(lblPeriods);
                add(textPeriods);
                add(lblFutureVal);
                add(btnOk);
 
                btnOk.addActionListener(this);
        }
 
        public void actionPerformed(ActionEvent evt)  
        {
            if (evt.getSource() == btnOk)
            {
                int PresentVal = Integer.parseInt(textPresentVal.getText());
                int InterestRate = Integer.parseInt(textInterestRate.getText());
                int Periods = Integer.parseInt(textPeriods.getText());
                double FutureVal = PresentVal * (Math.pow((1 + InterestRate), Periods));
                NumberFormat nf = NumberFormat.getCurrencyInstance();
                lblTotal.setText("Future Value: " + nf.format(FutureVal));
 
                repaint();
            }
        }
}

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