public class Spot {
    public int size;
    public int x, y;

    public Spot(int intSize) {
        size = intSize;
        x = -1;
        y = -1;
    }
}

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

public class ClickMe extends Applet implements MouseListener {
    private Spot spot = null;
    private static final int RADIUS = 7;

    public void init() {
addMouseListener(this);
    }

    public void paint(Graphics g) {
//draw a black border and a white background
        g.setColor(Color.white);
g.fillRect(0, 0, getSize().width - 1, getSize().height - 1);
        g.setColor(Color.black);
g.drawRect(0, 0, getSize().width - 1, getSize().height - 1);

//draw the spot
        g.setColor(Color.red);
if (spot != null) {
     g.fillOval(spot.x - RADIUS, spot.y - RADIUS, RADIUS * 2, RADIUS * 2);
        }
    }
    public void mousePressed(MouseEvent event) {
        if (spot == null) {
            spot = new Spot(RADIUS);
        }
spot.x = event.getX();
spot.y = event.getY();
repaint();
    }
    public void mouseClicked(MouseEvent event) {}
    public void mouseReleased(MouseEvent event) {}
    public void mouseEntered(MouseEvent event) {}
    public void mouseExited(MouseEvent event) {}
}

Originally posted by 素娜 at 2005-10-17 12:24 AM:
How to make .java to .class ?