椰子Java

/*
* A free J2ME sample program to demonstrate
* a SIMPLE LOGIN SCREEN TO LOGIN TO A HTTP SERVER
* FROM A J2ME phone
*
* @author William Alexander
* free for use as long as this comment is included in
* in the program as it is
* More Free Java programs available for download
* at http://www.java-samples.com
*
*/
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;  
import java.io.*;
import java.lang.*;
import javax.microedition.io.*;
import javax.microedition.rms.*;

public class Login extends MIDlet implements CommandListener {
   
  TextField UserName=null;
  TextField Location=null;
  Form authForm,mainscreen;
  TextBox t = null;
  StringBuffer b = new StringBuffer();
   private Display myDisplay = null;
   private Command okCommand = new Command("OK", Command.OK, 1);
   private Command exitCommand = new Command("Exit", Command.EXIT, 2);
   private Command backCommand = new Command("Back", Command.BACK, 2);
   private Alert alert = null;

   public Login() {        

       myDisplay = Display.getDisplay(this);

  UserName=new TextField("Your Name","",10,TextField.ANY);
  Location=new TextField("Location","",10,TextField.ANY);
  authForm=new Form("Identification");
  mainscreen=new Form("Logging IN");
  mainscreen.append("Logging in....");
  mainscreen.addCommand(backCommand);
  authForm.append(UserName);
  authForm.append(Location);
  authForm.addCommand(okCommand);
  authForm.addCommand(exitCommand);
  authForm.setCommandListener(this);
  myDisplay.setCurrent(authForm);

   }

   public void startApp() throws MIDletStateChangeException {
   }

   public void pauseApp() {
   }


 
   protected void destroyApp(boolean unconditional)
           throws MIDletStateChangeException {
   }

 
   public void commandAction(Command c, Displayable d) {
       
       if ((c == okCommand) && (d == authForm)) {
  if (UserName.getString().equals("") || Location.getString().equals("")){
    alert = new Alert("Error", "You should enter Username and Location", null, AlertType.ERROR);
    alert.setTimeout(Alert.FOREVER);
    myDisplay.setCurrent(alert);
  }
  else{
  //myDisplay.setCurrent(mainscreen);
  login(UserName.getString(),Location.getString());
  }
  }
       if ((c == backCommand) && (d == mainscreen)) {
    myDisplay.setCurrent(authForm);
  }
  if ((c == exitCommand) && (d == authForm)) {
    notifyDestroyed();
  }
  }
       
       public void login(String UserName,String PassWord) {
  HttpConnection connection=null;
  DataInputStream in=null;
  String url="http://www.cujava.com/";

  OutputStream out=null;  
  try
  {
    connection=(HttpConnection)Connector.open(url);
    connection.setRequestMethod(HttpConnection.POST);
    connection.setRequestProperty("IF-Modified-Since", "2 Oct 2002 15:10:15 GMT");
    connection.setRequestProperty("User-Agent","Profile/MIDP-1.0 Configuration/CLDC-1.0");
    connection.setRequestProperty("Content-Language", "en-CA");
    connection.setRequestProperty("Content-Length",""+ (UserName.length()+PassWord.length()));
    connection.setRequestProperty("UserName",UserName);
    connection.setRequestProperty("PassWord",PassWord);
  out = connection.openDataOutputStream();
  out.flush();
  in = connection.openDataInputStream();
  int ch;
  while((ch = in.read()) != -1) {
    b.append((char) ch);
    //System.out.println((char)ch);
  }
  //t = new TextBox("Reply",b.toString(),1024,0);
  mainscreen.append(b.toString());
  if(in!=null)
    in.close();
  if(out!=null)
    out.close();
  if(connection!=null)
    connection.close();
  }
  catch(IOException x){}
  myDisplay.setCurrent(mainscreen);
       
   }
}

   实现对文本显示的代码，虽然简单，但却非常实用。

案件描述：今天中午，我最喜欢的一款手机：5300离我而去了，就在我从汽车后坐换到前坐的一杀那！我现在心情很差。

    我喜欢5300是因为我在它上面开发了我第一个java手机游戏和软件。我太伤心了。

控制一个小鸡过马路，过了以后从新开始。

这是J2me GameCanvas的基础功能。同时还演示图片在一定速度下想一个方向前进。