第一个MIDP程序
这是一个最简单的MIDP程序，可以当作模版：import javax.microedition.midlet.*;<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
import javax.microedition.lcdui.*;
public class HelloMIDlet extends MIDlet implements CommandListener
{
private Display display;
private Command exitCommand;
private TextBox text;
public HelloMIDlet() {
display = Display.getDisplay(this);
exitCommand = new Command("离开", Command.BACK, 1);
text = new TextBox("Hello App", "Welcome!", 256, 0);
text.addCommand(exitCommand);
text.setCommandListener(this);
}
public void startApp() {
display.setCurrent(text);
}
public void pauseApp() {}
public void destroyApp(boolean unconditional) {}
public void commandAction(Command c, Displayable s) {
if (c == exitCommand) {
destroyApp(false);
notifyDestroyed();
}
}
}
MIDP的UI继承体系如下：
http://www.agoit.com/images/blog_csdn_net/asklxf/16543/o_midp_heritage.jpg
其中Canvas是低级接口，用于游戏等需要直接绘图的程序，Screen是高级接口，适合普通窗口程序如电话簿等。
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