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code:
HelloWorld.java





import javax.microedition.lcdui.*;

import javax.microedition.midlet.*;


public class HelloWorld extends MIDlet implements CommandListener {

  private Command exitCommand;

  private TextBox tb;

  public HelloWorld() {
    exitCommand = new Command("Exit", Command.EXIT, 1);
    tb = new TextBox("Hello 向东", "Hello,World!", 15, 0);
    tb.addCommand(exitCommand);
    tb.setCommandListener(this);
    
  }


  protected void startApp() throws MIDletStateChangeException {
    Display.getDisplay(this).setCurrent(tb);
    System.out.println("startApp");

  }

  protected void pauseApp() {
    System.out.println("pauseApp");

  }

  protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
    System.out.println("destroyApp");

  }


  public void commandAction(Command c, Displayable d) {
    if (c == exitCommand) {
      try {
        destroyApp(false);
      } catch (MIDletStateChangeException exception) {
        System.out.println("MIDletStateChangeException");
      }
      notifyDestroyed();
    }

  }

}

作者：jackxiang@向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除
地址：https://jackxiang.com/post/175/
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