gamerecords.java

自己写的一个简单的实现了排行榜的J2ME程序

import java.util.Random;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Item;
import javax.microedition.lcdui.ItemCommandListener;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
public class GameRecords extends MIDlet implements ItemCommandListener {
	public Display dis;
	private MyCanvas mc;
	public Form f;
	public TextField tf;
	private Command okCmd;
	private Command backCmd;
	public Random rmd;
	public int record;

	public GameRecords() {
		dis = Display.getDisplay(this);
		mc = new MyCanvas(this);
		dis.setCurrent(mc);
		rmd = new Random();
		f = new Form("新纪录");
		tf = new TextField("请输入你的名字", "", 10, TextField.ANY);
		okCmd = new Command("OK", Command.OK, -1);
		backCmd = new Command("Back", Command.BACK, 0);
	}

	protected void destroyApp(boolean bl) {

	}

	protected void pauseApp() {

	}

	protected void startApp() throws MIDletStateChangeException {
		f.append(tf);
		tf.addCommand(okCmd);
		tf.addCommand(backCmd);
		tf.setItemCommandListener(this);
	}

	public void commandAction(Command c, Item i) {
		if (c == okCmd) {
			player p = new player(tf.getString(), record);
			mc.addRecord(p);
			dis.setCurrent(mc);
		}
		if (c == backCmd) {
			dis.setCurrent(mc);
		}
	}

}