目录 一、访问权限（最核心区别）二、示例：类内、子类、外部访问三、继承时的访问级别变化举例： 四、实际应用场景举例示例：封装与继承五、总结口诀protected 用来干嘛？总结 一、访问权限（最核心
See my test page. When on the page, click the top left button \"Geocode\". If you are in Firefox, geocoder.geocode() will have it\'s status equal to ERROR (and pop an alert after a few seconds). In I
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