What are the access levels used for methods in object-oriented programming?

In object-oriented programming, the following access levels to methods are usually distinguished:

• public — the method is accessible from anywhere in the program.
• protected — the method is accessible within the class and its subclasses.
• private — the method is accessible only within the class itself.

Sometimes additional levels are encountered:

• package-private (in Java) — the method is accessible within the same package (absence of an access modifier).

Example in Java:

public class MyClass {
    public void publicMethod() {}
    protected void protectedMethod() {}
    private void privateMethod() {}
    void packagePrivateMethod() {} // accessible within the package
}

Such differentiation helps control encapsulation and protect the internal state of the object.