Java Object-Oriented Programming Literacy (Beginner Level)

Topics covered

• apply method overriding and recognize the concept of hiding
• apply the skip and available methods of FileInputStream objects and identify when the end of a byte stream has been reached
• apply the two ways of initializing derived classes - implement an explicit no argument constructor in the base class or use the super keyword and have only parameterized constructors in both the base and derived classes
• combine method overriding with fairly complex inheritance hierarchies
• completely and correct implement the .hashCode contract
• copy a character file as a sequence of characters using the FileReader and FileWriter classes
• copy any file as a sequence of bytes using the FileInputStream and FileOutputStream classes
• correctly override the .hashCode method and write the code to correctly override the .equals method, which is inherited from java.lang.Object
• define and invoke multiple constructors to instantiate objects of a class
• define getter and setter methods to work with access protected member variables
• describe the initialization of member variables of class objects
• identify the role of access modifiers and recognize the basics of constructors
• identify what happens when there is a base and derived class that have many different constructors
• make use of method overloading in your programs
• override the method .toString, which is inherited from java.lang.Object
• read a byte stream using the InputStream and FileInputStream classes
• read a character stream using the FileReader and FileReader classes
• recognize how static methods are bound using compile-time rather than run-time binding
• recognize how when you add your own constructor, Java takes away the default no-argument constructor it had provided
• recognize Java's class hierarchy for byte and character streams
• recognize that a base class's constructor is invoked when a derived class object is instantiated
• recognize that static methods don't support run-time polymorphism
• use advanced forms of overriding
• use the this keyword appropriately inside getter and setter methods of a class
• use the this keyword appropriately inside the constructor and other methods of a class
• write a byte stream using the OutputStream and FileOutputStream classes