textboxdemo.java

来自「Java ME手机应用开发大全一书的配套光盘上的源码」· Java 代码 · 共 44 行

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class TextBoxDemo extends MIDlet implements CommandListener
{
  private Display display; 
  private TextBox textbox; 
  private Command submit; 
  private Command exit; 
  public TextBoxDemo()
  {
   display = Display.getDisplay(this);
   submit = new Command("OK", Command.SCREEN, 1);
   exit = new Command("Exit", Command.EXIT, 1);
   textbox = new TextBox("PassWord:", "", 30, TextField.PASSWORD);
   textbox.addCommand(exit);
   textbox.addCommand(submit);    
   textbox.setCommandListener(this);   
  }
  public void startApp()
  {
   display.setCurrent(textbox);
  }
  public void pauseApp()
  { 
  }
  public void destroyApp(boolean unconditional)
  { 
  }
  public void commandAction(Command command, Displayable displayable)
  {
   if (command == submit)
   {
     textbox.setConstraints(TextField.ANY);
	 textbox.setString("PassWord is " + textbox.getString());
     textbox.removeCommand(submit);
   }
   else if (command == exit)
   {
      destroyApp(false);
      notifyDestroyed();
   }
  }
}