instructionsscreen.java

MIDP 2.0 下的一个打飞机的例子,主要是运用了2.0中比1.0多出来的GameCanvas类,还Game包,通过这个例子可以总结一下MIDP2.0比1.0在开发游戏方面的优势.

package hawk;

import javax.microedition.lcdui.*;


class InstructionsScreen
    extends Form
    implements CommandListener
{
    private final HawkMIDlet parent;
    private final Command backCommand;

    private static final String instructions =
        "这是一个动作游戏的早期原型，" +
        "本版本中你能做的就是移动飞机和开火。";

    InstructionsScreen(HawkMIDlet parent)
    {
        super("Instructions");
        this.parent = parent;

        append(new StringItem(null, instructions));

        backCommand = new Command("Back", Command.BACK, 1);
        addCommand(backCommand);
        setCommandListener(this);
    }


    public void commandAction(Command c, Displayable d)
    {
        // There is only one command: Back
        parent.instructionsBack();
    }
}