OCA

OCA

1. 1. 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

2. 2. Working With Java Data Types

   • Declare and initialize variables
   • 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

3. 3. Using Operators and Decision Constructs

   • Use Java operators
   • Use parenthesis to override operator precedence
   • Test equality between Strings and other objects using == and equals ()
   • Create if and if/else constructs
   • Use a switch statement

4. 4. 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

5. 5. 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

6. 6. Working with Methods and Encapsulation

   • Create methods with arguments and return values
   • Apply the static keyword to methods and fields
   • Create an overloaded method
   • Differentiate between default and user defined constructors
   • Create and overload constructors
   • Apply access modifiers
   • Apply encapsulation principles to a class
   • Determine the effect upon object references and primitive values when they are passed into methods that change the values

7. 7. Working with Inheritance

   • Implement inheritance
   • Develop code that demonstrates the use of polymorphism
   • 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

8. 8. Handling Exceptions

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