display.setCurrent(f);
}
public void pauseApp(){
System.out.println("pauseApp is called.");
}
public void destroyApp(boolean unconditional){
System.out.println("destroyApp is called.");
}
}
编译该程序后运行，控制台上就会依次输出：
Constructor startApp is called.
当我们退出该程序时，控制台就会输出：
destroyApp is called.
