Java Access Specifiers: Most Restricted Access

The access specifier with the most restricted access is 'private'.

Here's a breakdown of access levels:

• private: Accessible only within the same class.
• public: Accessible from anywhere.
• protected: Accessible within the same package and subclasses.
• default: Accessible within the same package.

Therefore, 'private' provides the highest level of access restriction, limiting visibility to the declaring class itself.