helloworld.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 33 行

package qdu.sun;  
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class HelloWorld extends MIDlet implements CommandListener
{
  private Display display ;	    
  private TextBox textBox ; 
  private Command quitCommand; 
  public void startApp()
  {
    display  = Display.getDisplay(this);
    quitCommand = new Command("Quit", Command.SCREEN, 1);
    textBox  = new TextBox("Hello World", "First MIDlet", 40, 0);
    textBox .addCommand(quitCommand);
    textBox .setCommandListener(this);
    display .setCurrent(textBox );
  }
  public void pauseApp()
  { 
  }
  public void destroyApp(boolean unconditional)
  { 
  }
  public void commandAction(Command choice, Displayable displayable)
  {
    if (choice == quitCommand)
    {
      destroyApp(false);
      notifyDestroyed();
     }
  }
}