import java.awt.*;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
public class Calculator2 extends JFrame implements ActionListener {
private JPanel panelAdder;
private JLabel labela;
private JLabel labelt;
private JLabel labelr;
private JTextField textFieldAmount;
private JTextField textFieldTerm;
private JTextField textFieldRate;
private JTextField textFieldResult;
private JTextField textFieldClear;
private JButton buttonCalc;
private JButton buttonClear;
 
//Clear Fields
private boolean clearText=true;
String selection=("");
 
 
public Calculator2() {
super("Calculator");
initComponents();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
pack();
 
// Add Listeners
buttonCalc.addActionListener(this);
buttonClear.addActionListener(this);
 
}
public void initComponents() {
//Initialize Components
panelAdder = new JPanel();
labela = new JLabel("Amount");
textFieldAmount = new JTextField();
labelt = new JLabel("Term");
textFieldTerm = new JTextField();
labelr = new JLabel("Rate");
textFieldRate = new JTextField();
textFieldResult = new JTextField();
JButton calculate = new JButton("Calculate");
JTextFieldClear = new JTextField("");
JButton clear = new JButton("Clear");
JButton exit = new JButton("Exit");
}
 
public void actionPerformed(ActionEvent event) {
Object source = event.getSource ();
 
if (source == buttonCalc); {
setResultValue();
else if (event.getSource() == JButton("Clear")) {
clearText=true; //set clear text flag to true for new calculation
JTextFieldAmount.setText(""); //set text field to null string (clear)
JTextFieldTerm.setText(""); 
JTextFieldRate.setText(""); 
JTextFieldAmount.requestFocus(); //return focus to Amount 
} 
//Set Object Attributes
textFieldResult.setEditable(false);
textFieldResult.setColumns(8);
textFieldAmount.setColumns(6);
textFieldTerm.setColumns(2);
textFieldRate.setColumns(2);
Container contentPane = getContentPane();
contentPane.setLayout(new FlowLayout());
}
// add components to the panel
public void setResultValue() {
double amount = Double.parseDouble (textFieldAmount.getText());
double rate = Double.parseDouble (textFieldRate.getText());
double term = Integer.parseInt(textFieldTerm.getText());
double result = amount * ( rate * Math.pow ( ( 1 + rate ), term ) ) / ( Math.pow( ( 1 + rate ), term ) - 1 );
 
textFieldResult.setText(Double.toString(result));
}
} 
public class Calculator {
public static void main(String[] arguments) {
Calculator frame = new Calculator();
}
}
}

/*if (source == buttonCalc); {
setResultValue();
else if (event.getSource() == JButton("Clear")) {
clearText=true; //set clear text flag to true for new calculation*/
if (source == buttonCalc)
{
  setResultValue();
}
else if (event.getSource() == JButton("Clear")) 
{
  clearText=true; //set clear text flag to true for new calculation
}

if (source == buttonCalc); {   // no semicolon needed after the condition