OCAJP 7 TOPICS

Java Basics

  • Define the scope of variables
  • Define the structure of a Java class
  • Create executable Java applications with a main method
  • Import other Java packages to make them accessible in your code

Working With Java Data Types

  • Declare and initialize variables
  • Articles: Identifiers and JavaBeans Literals
  • Quizzes: Identifiers and JavaBeans QuizLiterals Quiz
  • Differentiate between object reference variables and primitive variables
  • Read or write to object fields
  • Explain an Object's Lifecycle (creation, "dereference" and garbage collection)
  • Call methods on objects
  • Manipulate data using the StringBuilder class and its methods
  • Creating and manipulating Strings

Using Operators and Decision Constructs  

Creating and Using Arrays

  • Declare, instantiate, initialize and use a one-dimensional array
  • Declare, instantiate, initialize and use multi-dimensional array
  • Declare and use an ArrayList

Using Loop Constructs

  • Create and use while loops
  • Create and use for loops including the enhanced for loop
  • Create and use do/while loops
  • Compare loop constructs
  • Use break and continue  

Working with Methods and Encapsulation

Working with Inheritance

  • Implement inheritance
  • Articles: OOP Concepts
  • Quizzes: OOP Concepts Quiz
  • Develop code that demonstrates the use of polymorphism
  • Articles: OOP Concepts
  • Quizzes: OOP Concepts Quiz
  • Differentiate between the type of a reference and the type of an object
  • Determine when casting is necessary
  • Use super and this to access objects and constructors
  • Use abstract classes and interfaces

Handling Exceptions

  • Differentiate among checked exceptions, RuntimeExceptions and Errors
  • Create a try-catch block and determine how exceptions alter normal program flow
  • Articles: Try-Catch
  • Quizzes: Try-Catch Quiz
  • Describe what Exceptions are used for in Java
  • Invoke a method that throws an exception
  • Recognize common exception classes and categories


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