Try the applet generated by this program. Press the up arrow to slow the descent.

Now try the following changes:

Show how much fuel is left by adding the following line to the paintFrame method.
```
g.drawString("Fuel: "+fuel,50,10);
```
In the tick method decrement fuel inside the if statement. Use fuel--

The applet A1.java creates a single Sprite object. The Sprite method tick gets called 10 times per second and this is where the game state is updated. The parameter kid holds the "key is down" list: it is an array of boolean values - a true value for kid[KeyEvent.VK_UP] indicates that the up key is currently being held down.

The list of key codes is at KeyEvent. 0){ yv-=2; } y+=yv; } public void paintFrame(Graphics2D g,boolean[]kid) { g.drawRect(10,y,10,10); } } ]]> 0){ yv-=2; fuel--; } y+=yv; if (y>380){ halt = true; } } public void paintFrame(Graphics2D g,boolean[]kid) { g.drawString("Fuel: "+fuel,50,20); g.drawString("Speed: "+yv,50,30); if (!halt){ g.drawRect(10,y,10,10); }else{ if (yv>2) g.drawString("You crashed :(",50,40); else g.drawString("Good landing!",50,40); } } } ]]> 400) x-=400; if (y>400) y-=400; if (x<0) x+=400; if (y<0) y+=400; } public void paintFrame(Graphics2D g,boolean[]kid) { g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g.translate(x,y); g.rotate(angle); g.drawPolygon(ship); g.rotate(-angle); g.translate(-x,-y); } } ]]>