Oracle Java 11 OCA

Introduction

	Introduction
	History of the Java programming language
	Oracle Java Exams

Understanding Java Technology and Environment

	Describe Java Technology
	Identify key features of the Java Language

Creating a Simple Java Program

	Create a executable Java program with a main class
	Compile and run a Java program from the commandline
	Create and import packages

Working with Java Primitive Data Types and String API's

	Declare and initialize variables
	Wrapper Classes
	Identify the scope of a variable
	Use local variable type inference
	Create and manipulate strings
	Manipulate data using the StringBuilder class and its methods

Using Operators and Decisions Constructs

	Use Java operators including the use of parenthesis to override operator precedence
	Use Java control statements including if, else and switch
	While, for and for each loops, including nested loops, use break and continue statements

Working with Java Arrays

	Declaring, Constructing and Initializing Arrays
	Manipulating Arrays

Describing and Using Objects and Classes

	Define the structure of a Java class
	Declare and instantiate Java objects
	this Keyword
	Garbage Collector

Creating and Using Methods

	Create methods and return values
	Create and invoke overloaded methods
	Apply the static keyword to methods and fields

Applying Encapsulation

Apply encapsulation

Reusing Implementations through Inheritance

	Create and use subclasses and superclasses
	Create and extend abstract classes
	Enable polymorphism by overriding methods
	Utilize polymorphism to cast and call methods
	Distinguish overloading, overriding, and hiding

Programming Abstractly through Interfaces

	Create and implement interfaces
	Distinguish class inheritance from interface inheritance including abstract classes
	Declare and use List and ArrayList instances
	Understanding lambda Expressions

Handling Exception

	Differentiate among checked, unchecked exceptions, and errors
	Create try-catch blocks and determine how exceptions alter program flow
	Create and invoke a method that throws an exception

Understanding Modules

	Describe the Modular JDK
	Declare modules and enable access between modules
	Describe how a modular project is compiled and run