calcmidlet.java

J2ME程序设计实例教程的源码

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

/**
 * 该类是应用程序的主类，控制应用程序的生命周期。
 */
public class CalcMIDlet extends MIDlet implements CommandListener {
    //
    private CalcForm calcForm;
    private Command cmdExit = new Command("退出", Command.EXIT, 1);
    
    public void startApp() {
        Display display = Display.getDisplay(this);
        calcForm = new CalcForm();
        calcForm.addCommand(cmdExit);
        calcForm.setCommandListener(this);
        display.setCurrent(calcForm);
    }
    
    public void pauseApp() {
        //
    }
    
    public void destroyApp(boolean unconditional) {
        //
    }
    
    public void commandAction(Command cmd, Displayable d) {
        if(cmd == cmdExit) {
            notifyDestroyed();
        }
    }
}