client.java

非富多彩的十六个J2ME的例子

import java.io.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import java.lang.*;
import javax.microedition.midlet.*;

public class client extends MIDlet implements CommandListener
{
   private String url="http://localhost:8000/ServletContext/ServerAlias";
   public Display dis;
   
   Command cmdexit=new Command("Exit",Command.EXIT,1);
   Command cmdok=new Command("Ok",Command.OK,1);
   Command cmdsend=new Command("Back",Command.OK,1);
   
   private TextBox entryForm;
   
   public client()
   {
   	   
   	}
   	
   	protected void startApp() throws MIDletStateChangeException
   	{
   		if(dis==null)
   		{
   		   dis=Display.getDisplay(this);
   		   Form contain_form=new Form("Container Form");
   		   List menu;
   		   TextBox input;
   		   dis=Display.getDisplay(this);
   		   menu=new List("Smmb    Account Enquiry",Choice.IMPLICIT);
   		   menu.append("Current Balance",null);
   		   menu.append("Fixed Deposit",null);
   		   menu.append("Check Status",null);
   		   menu.addCommand(cmdexit);
   		   menu.addCommand(cmdok);
   		   menu.setCommandListener(this);
   		   menu.setCommandListener(this);
   		   dis.setCurrent(menu);
   		   		
   		}
   		
   	}
   	
   	protected void pauseApp()
   	{
   	}
   	
   	protected void destroyApp(boolean b) throws MIDletStateChangeException
   	{
   		
   	}
   	
   	public void commandAction(Command c,Displayable dis)
   	{
   		
   	    if(c==cmdsend)
   	    {
   	     StatusForm  formstatus=new StatusForm(entryForm.getString());
   	     dis.setCurrent(formstatus);
   	     formstatus.start();
   	     
   	     }
   	     
   	     else if(c==cmdok)
   	     {
   	        entryForm=new EntryForm();
   	        dis.setCurrent(entryForm);	
   	     	
   	     }
   	     
   	     else
   	     {
   	     	exitMIDlet();
   	     }
   	
   	}
   	
   		
	
}

class EntryForm extends TextBox
{
   EntryForm()
   {
      super("Enter your PIN","",80,0);
      addCommand(cmdexit);
      addCommand(cmdsend);
      setCommandListener(client.this);	
   	
   }	
	
}

class StatusForm extends Form implements Runnable,midletcon.Callback
{
   StatusForm()
   {
	   	super("Status");
	   	try
	   	{
	   		ByteArrayOutputStream byteout=new ByteArrayOutputStream();
	   		DataOutputStream dataout=new DataOutputStream(byteout);
	   		dataout.writeUTF(text);
	   		data=byteout.toByteArray();
	   		dataout.close();
	 
	  
	   		
	   	}
	   	
	   	catch(IOException e)
	   	{
	   	   	
	   	}
	   	
	   	
	   	 void display(String text)
	   	{
	   		StringItem message;
	   	   if(message==null)
	   	   {
	   	      message=new StringItem(null,text);
	   	      append(message);
	   	      	
	   	   	
	   	   }
	   	   
	   	   else
	   	   {
	   	   	   message.setText(text);
	   	   }	
	   		
	   	}
   }
   
   	
	
}