Accessibility : Inheritance « Class Definition « Java Tutorial

Within a subclass you can access its superclass's public and protected methods and fields , but not the superclass's private methods. If the subclass and the superclass are in the same package, you can also access the superclass's default methods and fields.

public class P {
  public void publicMethod() {

  protected void protectedMethod() {

  void defaultMethod() {

class C extends P {
  public void testMethod() {

5.22.3.Method Overriding
5.22.4.The extends Keyword
5.22.5.Deriving a Class
5.22.6.The keyword super represents an instance of the direct superclass of the current object.
5.22.7.Derived Class Constructors: Calling the Base Class Constructor
5.22.8.Overriding a Base Class Method
5.22.9.Type Casting
5.22.10.Inheritance, constructors and arguments
5.22.11.Combining composition and inheritance
5.22.12.Inheritance and upcasting.
5.22.13.Overloading a base-class method name in a derived class does not hide the base-class versions.
5.22.14.Cleanup and inheritance
5.22.15.Creating a Multilevel Hierarchy
5.22.16.Demonstrate when constructors are called in a Multilevel Hierarchy