What are the levels of access to methods in object-oriented programming?

In object-oriented programming (using Java as an example), there are the following access levels for methods:

• public — the method is accessible from anywhere in the program.
• protected — the method is accessible within its class, in subclasses, and within the package.
• default (package-private) — if no modifier is specified, the method is accessible only within the current package.
• private — the method is accessible only within its class.

Example:

public class Example {
    public void publicMethod() {}
    protected void protectedMethod() {}
    void defaultMethod() {} // package-private
    private void privateMethod() {}
}

Choosing the access level helps control encapsulation and protect the internal implementation details of the class.