[techforray]

I am in a begining Java class and I cant figure something out. I am trying to add actionlistener to my program so that the buttons will do something. The reading is vague and I dont understand it very well. I have spent hours trying to figure this out. Can someone plese help. I have attached the code below.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;


public class MortgageDriver extends JFrame implements ActionListener{
public void actionPerformed(ActionEvent event);{
}

// set up row 1
JPanel row1 = new JPanel();
ButtonGroup option = new ButtonGroup();
JLabel yearsLable = new JLabel("How many years of Mortgage: ", JLabel.RIGHT);
JButton byears7 = new JButton("7");
JButton byears15 = new JButton("15");
JButton byears30 = new JButton("30");

// set up row 2
JPanel row2 = new JPanel();
JLabel lyears7 = new JLabel(" The intrest rate for 7 year loan is: .??? ", JLabel.CENTER);
JLabel lyears15 = new JLabel(" The intrest rate for 15 year loan is: .??? ", JLabel.CENTER);
JLabel lyears30 = new JLabel(" The intrest rate for 30 year loan is: .??? ", JLabel.CENTER);

// set up row 3
JPanel row3 = new JPanel();
JLabel lamount = new JLabel("Amount of Loan: ", JLabel.RIGHT);
JTextField namount = new JTextField();

// set up row 4
JPanel row4 = new JPanel();
ButtonGroup option4 = new ButtonGroup();
JButton calcmortg = new JButton("Calculate Mortgage");

// set up row 5
JPanel row5 = new JPanel();
ButtonGroup option5 = new ButtonGroup();
JButton exit = new JButton("Exit");

public MortgageDriver() {
super("Mortgage Calculator");
setSize(750, 270);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
GridLayout layout = new GridLayout(5, 1, 10, 10);
Container pane = getContentPane();
pane.setLayout(layout);

FlowLayout layout1 = new FlowLayout(FlowLayout.CENTER,
10, 10);
option.add(byears7);
option.add(byears15);
option.add(byears30);
row1.setLayout(layout1);
row1.add(yearsLable);
row1.add(byears7);
row1.add(byears15);
row1.add(byears30);
pane.add(row1);

FlowLayout layout2 = new FlowLayout(FlowLayout.CENTER,
10, 10);
row2.setLayout(layout2);
row2.add(lyears7);
row2.add(lyears15);
row2.add(lyears30);
pane.add(row2);

GridLayout layout3 = new GridLayout(0, 7);
row3.setLayout(layout3);
row3.add(lamount);
row3.add(namount);
pane.add(row3);

FlowLayout layout4 = new FlowLayout(FlowLayout.CENTER,
10, 10);
row4.setLayout(layout4);
option4.add(calcmortg);
row4.add(calcmortg);
pane.add(row4);

FlowLayout layout5 = new FlowLayout(FlowLayout.CENTER,
10, 10);
row5.setLayout(layout5);
option5.add(exit);
row5.add(exit);
pane.add(row5);



setContentPane(pane);
setVisible(true);
}
public static void main(String[] arguments) {
MortgageDriver md = new MortgageDriver();
}
}

[Doggan]

You're not adding your buttons to the action listener. They don't know where to go to get their behavior. For example:

theButton = new JButton( "Some Name" );

theButton.addActionListener( this );

If you do that code in your MortgageDriver code, theButton will now look to that class for it's implementation. Now you need to implement something in the actionPerformed() method (get rid of that semi-colon). In that method, you'd do something like this:

if (event.getSource() == theButton ) {
// do something
}