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java io File setReadable(booleanreadable)方法设置所有者和每个人的读取访问权限,此抽象路径名。1语法publicbooleansetReadable(boolean
java io File setReadable(booleanreadable)方法设置此抽象路径名的存取权限。1语法publicbooleansetReadable(booleanreadable)2参数readab