Stuff

package saucerlander;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JPanel;public class CorrectSaucerLander extends JPanel    implements ActionListener{    public CorrectSaucerLander()    {        step = 10;        slowStep = 1;        ht = 10;        wd = 20;        scale = 1.2D;        slowScale = 1.02D;        near = new JButton("Fast");        slow = new JButton("Slow");        quit = new JButton("Quit");        fontSize = 8;        setPreferredSize(new Dimension(750, 600));        add(near);        near.addActionListener(this);        add(slow);        slow.addActionListener(this);        add(quit);        quit.addActionListener(this);	    }    public void paintComponent(Graphics g)    {        super.paintComponent(g);        g.setColor(Color.green);        g.fillRect(0, 400, 750, 200);        if(x + ht < 400)            g.setColor(Color.pink);        else            g.setColor(Color.red);        g.fillOval(x, y, wd, ht);        g.setColor(Color.black);        if(wd > 80)        {            fontSize = wd / 12;            g.setFont(new Font("TimesRoman", 0, fontSize));            g.drawString("JavaShip 17", x + wd / 4, y + ht / 2);            g.fillRect(x + wd / 4, y + ht / 2 + 10, wd / 20, wd / 20);            g.fillRect(x + wd / 4 + wd / 16, y + ht / 2 + 10, wd / 20, wd / 20);            g.fillRect(x + wd / 4 + wd / 8, y + ht / 2 + 10, wd / 20, wd / 20);            g.fillRect(x + wd / 4 + (3 * wd) / 16, y + ht / 2 + 10, wd / 20, wd / 20);            g.fillRect(x + wd / 4 + wd / 4, y + ht / 2 + 10, wd / 20, wd / 20);            if(x + ht >= 400)                g.drawLine(x + (3 * wd) / 4, y + (3 * ht) / 4, x + (4 * wd) / 5, 400);        }    }    public void actionPerformed(ActionEvent e)    {        if(e.getSource() == near)        {            x += step;            y += step;            ht = (int)(scale * (double)ht);            wd = (int)(scale * (double)wd);            repaint();        } else        if(e.getSource() == slow)        {            x += slowStep;            y += slowStep;            ht = (int)(slowScale * (double)ht);            wd = (int)(slowScale * (double)wd);            repaint();        } else        if(e.getSource() == quit)            System.exit(0);    }    private int x;    private int y;    int step;    int slowStep;    int ht;    int wd;    double scale;    double slowScale;    JButton near;    JButton slow;    JButton quit;    int fontSize;}