openCalendar and openBrowser methods

//open calendar method
public void openCalendar(View view)
    {
        Intent calendarIntent = new Intent() ;
        calendarIntent.setClassName("com.android.calendar","com.android.calendar.AgendaActivity");
    }
    
    //openbrowser method
    public void openBrowser(View view)
    {
        Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.google.com"));
        startActivity(browserIntent);
    }