Java: Component Design

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Hey, I have an issue with my JButton, and JTextField components; they’re both repeating themself in a strange pattern, also overlapping, so it look’s very crazy in the applet.
Screen: http://oi51.tinypic.com/343svv8.jpg


import javax.swing.*;
import java.applet.*;
import java.math.*;
import java.util.*;
import java.awt.*;

public class Calculator extends Applet
{
    public int a;
    public String b = "Hello";

    public void paint(Graphics g)
    {
        // Our methods for the design.
        setBackground(Color.WHITE);

        // Components.
        JButton roll = new JButton();
        roll.setSize(85,24);
        add(roll);

        JTextField wf = new JTextField();
        wf.setSize(645,24);
        wf.setPreferredSize(new Dimension(645,24));
        add(wf);

        // Outputs.
        g.drawString("text.");
    }

}

I want to align each component based on coordinates in the applet, and not only center, south, west, etc. I just got into 2D graphics designs and components, etc.

Regards