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һм̳ 1.protectedijԱ ڲԷʣ ʹߣܷʣ ԱԷʣ 2.಻ɷʻprivateԱ 3.ɷʻprotectedԱ 4.ɷʻpublicԱ

          public̳         

public -> public

protected -> protected

private -> ɷ

˽м̳ ҲɷʻprivateԱ

          private̳       

public -> private

protected -> private

private -> ɷ

̳ ʽΪprotectedļ̳гΪ̳Уּ̳зʽ£ publicԱлprotectedԱ protectedprivateԱбԭķȨ ע㣺ñ̳еʱpublicԱΪprotectedԱʹ߲ɷʣɷʣ

        protected̳     

public -> protected

protected -> protected

private -> ɷ

ġԻԱķʽ 1.ֱͨӷʻԱ 2.ԱֱӷʻԱ 3.ͨ޶ʱصĻԱ