我找到了一个声明代码的代码
private final static String API_RTN_SUCCESS = "0";
private final static String API_RTN_ERROR = "1";
public static final String SHARED_PREFERENCE_CONFIG = "shared_preference_config";
public static final String STARTUP_SETTING_KEY = "startup_setting";
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它们之间有什么区别或它们是一样的?或者它的不同private或public?