Source Code : Mapping Commands

Java Is Open Source Programming Language You Can Download From Java and Java Libraries From http://www.oracle.com. Click Here to download
We provide this code related to title for you to solve your developing problem easily. Libraries which is import in this program you can download from http://www.oracle.com. Click Here or search from google with Libraries Name you get jar file related it

Mapping Commands

/*--------------------------------------------------
* MappingCommands.java
*
* Example from the book:     Core J2ME Technology
* Copyright John W. Muchow   http://www.CoreJ2ME.com
* You may use/modify for any non-commercial purpose
*-------------------------------------------------*/
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class MappingCommands extends MIDlet implements CommandListener
{
  private Display display;      // Reference to Display object for this MIDlet
  private Form fmMain;          // Main Form  
  private TextBox tbHelp;       // Textbox to display help message
  private Command cmExit;       // Exit the MIDlet
  private Command cmHelp;       // Ask for Help
  private Command cmBack;       // Go "back" to the main form

  public MappingCommands()
  {
    display = Display.getDisplay(this);
    
    cmHelp = new Command("Help", Command.HELP, 1);
    cmBack = new Command("Back", Command.BACK, 1);
    cmExit = new Command("Exit", Command.EXIT, 1);
    
    // Create the Form, add Commands, listen for events
    fmMain = new Form("Core J2ME");
    fmMain.addCommand(cmExit);
    fmMain.addCommand(cmHelp);    
    fmMain.setCommandListener(this);
            
    // Create the help Textbox with a maximum of 25 characters
    tbHelp = new TextBox("Help", "Help text here...", 25, 0);
    tbHelp.addCommand(cmBack);
    tbHelp.setCommandListener(this);      
 
  }

  // Called by application manager to start the MIDlet.
  public void startApp()
  {
    display.setCurrent(fmMain);
  }

  // A required method
  public void pauseApp()
  { }

  // A required method
  public void destroyApp(boolean unconditional)
  { }

  // Process events
  public void commandAction(Command c, Displayable s)
  {
    if (c == cmExit)
    {
      destroyApp(false);
      notifyDestroyed();
    }
    else if (c == cmHelp)
      display.setCurrent(tbHelp);     
    else if (c == cmBack)
      display.setCurrent(fmMain);     
  }
}


           
       

Thank with us