Calculator help plz..i really need help!

[schmo]

ok so im making a Calculator..and i got the graphic part..and id ont know how to do the math..
i got 2 files one for the graphic..and the other for the math..for like the caluction
import java.awt.*;
import java.awt.event.*;
public class Calculatorsgui extends Frame implements WindowListener
{
protected Button plus, subract, times, divide, exitButton;
protected TextField input1, input2, answer;
private Calculatorsgui controller;

public Calculatorsgui ()
{
setTitle ("Calculator"); // Set the frame's name

setLayout (new FlowLayout (FlowLayout.CENTER));

setSize (180, 180); // Set the frame's size


// SimpleController is a class that handles the button clicks
CalculatorsController controller = new CalculatorsController (this);

// Adding an empty non-editable text field


Label l = new Label ("Number1");
add ("South", l);

input1 = new TextField (10);
input1.setEditable (true);
add ("Center", input1);

Label a = new Label ("Number2");
add ("South", a);

input2 = new TextField (10);
input2.setEditable (true);
add ("Center", input2);

// add buttons to the frame and connect the controller to it
plus = new Button ("+");
plus.addActionListener (controller);
add (plus);

subract = new Button ("-");
subract.addActionListener (controller);
add (subract);

times = new Button ("*");
times.addActionListener (controller);
add (times);

divide = new Button ("/");
divide.addActionListener (controller);
add (divide);


Label b = new Label ("The Answer");
add ("South", b);

answer = new TextField (10);
answer.setEditable (false);
add ("Center", answer);



exitButton = new Button ("exit");
exitButton.addActionListener (controller);
add (exitButton);

// Make the frame handle window events

addWindowListener (this);

show (); // Show the frame or use setVisible (true)

} // Constructor


public void paint (Graphics g)
{
// Place the drawing code here
} // paint method


public void windowDeiconified (WindowEvent event)
{
}


public void windowIconified (WindowEvent event)
{
}


public void windowActivated (WindowEvent event)
{
}


public void windowDeactivated (WindowEvent event)
{
}


public void windowClosed (WindowEvent event)
{
}


public void windowClosing (WindowEvent event)
{
System.exit (0);
}


public void windowOpened (WindowEvent event)
{
}


public static void main (String[] args)
{
new Calculatorsgui (); // Create a SimpleExample frame
} // main method
}



then for my sencond file..i have no idea wat to do!this is wat i got..i need adding..and divide..and subtract

import java.awt.*;
import java.awt.event.*;
public class CalculatorsController implements ActionListener
{
Calculatorsgui view;

public CalculatorsController (Calculatorsgui view)
{
this.view = view;
}


public void actionPerformed (ActionEvent event)
{

// You can get the source object of an event

Object source = event.getSource ();

//You can compare the event source with actual objects.

if (source == view.exitButton)
System.exit (0);


so if anyone can do thing for me..u be my hero..no JOKES!!!!!!!!!! PLEASE HELP ..im on my knees

[sjalle]

First, you cannot add components to a flowlayout container using borderlayout constraints (north, south,
east,west and center), and if you use borderlayout
you cannot add more than 5 components, one for each
place.

If you want to respond to buttonclicks then the usual
approach is to let the frame implement the
ActionListener interface. You don't have to make a
special class for listening to events, any class can do that, as long as it implements the event's listener interface.

Leaving out the number-keypad solution your code could
be done like this:

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

class Calculatorsgui extends Frame implements ActionListener {
  protected Button plus, subract, times, divide, exitButton;
  protected TextField input1, input2, answer;


  public static void main(String[] args) {
    Calculatorsgui view = new Calculatorsgui();
  }
  /**
   * Constructor
   */
  public Calculatorsgui() {
    setTitle("Calculator"); // Set the frame's name
    setLayout(new FlowLayout(FlowLayout.CENTER));
    setSize(180, 180); // Set the frame's size

// Adding an empty non-editable text field

    Label lb1 = new Label("Number1");
    add(lb1);
    input1 = new TextField(10);
    add(input1);

    Label lb2 = new Label("Number2");
    add(lb2);

    input2 = new TextField(10);
    input2.setEditable(true);
    add(input2);

// add buttons to the frame and connect the controller to it
    plus = new Button("+");
    plus.addActionListener(this);
    add(plus);

    subract = new Button("-");
    subract.addActionListener(this);
    add(subract);

    times = new Button("*");
    times.addActionListener(this);
    add(times);

    divide = new Button("/");
    divide.addActionListener(this);
    add(divide);

    Label lbl3 = new Label("The Answer");
    add(lbl3);

    answer = new TextField(10);
    answer.setEditable(false);
    add(answer);

    exitButton = new Button("exit");
    exitButton.addActionListener(this);
    add(exitButton);

    setVisible(true); // show() is deprecated....

  }
  private void calculate (Button btn) {
    try {
      double num1 = Double.parseDouble(input1.getText().trim());
      double num2 = Double.parseDouble(input2.getText().trim());
      if (btn==plus) {
        answer.setText(Double.toString(num1+num2));
      } else if (btn==subract) {
        answer.setText(Double.toString(num1-num2));
      } else if (btn==times) {
        answer.setText(Double.toString(num1*num2));
      } else if (btn==divide) {
        if (num2==0.0d) {
          answer.setText("div by 0 !");
        } else {
          answer.setText(Double.toString(num1/num2));
        }
      }
    }
    catch (NumberFormatException ex) {
      answer.setText("*bad input*");
    }
  }
  public void actionPerformed(ActionEvent event) {
    Object source = event.getSource();
    if (source == exitButton) {
      System.exit(0);
    } else {
      calculate((Button)source);
    }

  }
}