import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class InterestCalcApplet extends Applet implements ActionListener {
TextField principalField, rateField, numYearsField;

double simpleInterest = 0;
double amount = 0;
double principal = 0;
double numYears = 0;
double rate = 0;

public void init()
{
principalField = new TextField (6);
rateField = new TextField (6);
numYearsField = new TextField (6);
Label principalLabel = new Label ("Principal ");
Label rateLabel = new Label ("Rate (%) ");
Label numYearsLabel = new Label ("Time (in years) ");
Button calcButton = new Button ("Calculate");

add (principalLabel);
add (principalField);
add (rateLabel);
add (rateField);
add (numYearsLabel);
add (numYearsField);
add (calcButton);

calcButton.addActionListener (this);
}


public void actionPerformed (ActionEvent e)
{
String principalString = principalField.getText ();

principalString = principalString.trim ();

Double principalDouble = new Double (principalString);

principal = principalDouble.doubleValue ();

String numYearsString = numYearsField.getText ();
numYearsString = numYearsString.trim ();
Double numYearsDouble = new Double (numYearsString);
numYears = numYearsDouble.doubleValue ();

rate = new Double (rateField.getText().trim()).doubleValue();

simpleInterest = (principal * rate * numYears) / 100;
amount = principal + simpleInterest;
repaint();
}
public void paint (Graphics g)
{
g.drawString ("The simple interest and amount after " + numYears + " years", 60,100);
g.drawString (" Simple Interest: " + simpleInterest, 60,120);
g.drawString (" Total amount: " + amount, 60,140);
}
}

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