Preparation of OCA

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  1. Write Java code that uses variables, arrays, conditional and loop constructs
  2. Manipulate primitive numeric data and string data using Java operators
  3. Create Java classes and use object references
  4. Access the fields and methods of an object
  5. Manipulate text data using the methods of the String and StringBuilder classes
  6. Use casting without losing precision or causing errors
  7. Declare, override, and invoke methods
  8. Access and create static fields and methods
  9. Use classes from the java.time and java.time.format packages to format and print the local date and time
  10. Encapsulate a class using access modifiers and overloaded constructors
  11. Define and implement a simple class hierarchy
  12. Demonstrate polymorphism by implementing a Java Interface
  13. Use a Predicate Lambda expression as the argument to a method
  14. Handle a checked exception in a Java application                                                                             


Course Topics:-

What Is a Java Program?

  • Introduction to Computer Programs
  • Key Features of the Java Language
  • The Java Technology and Development Environment
  • Running/testing a Java program

Creating a Java Main Class

  • Java Classes
  • The main Method

Data In the Cart

  • Introducing variables
  • Working with Strings
  • Working with numbers
  • Manipulating numeric data

Managing Multiple Items

  • Working with Conditions
  • Working with a List of Items
  • Processing a list of items

Describing Objects and Classes

  • Working with objects and classes
  • Defining fields and methods
  • Declaring, Instantiating, and Initializing Objects
  • Working with Object References
  • Doing more with Arrays
  • Introducing the NetBeans IDE
  • Introducing the Soccer League Use Case

Manipulating and Formatting the Data in Your Program

  • Using the String Class
  • Using the Java API Docs
  • Using the StringBuilder Class
  • More about primitive data types
  • The remaining numeric operators
  • Promoting and casting variables

Creating and Using Methods

  • Using methods
  • Method arguments and return values
  • Static methods and variables
  • How Arguments are Passed to a Method
  • Overloading a method

Using Encapsulation

  • Access Control
  • Encapsulation
  • Overloading constructors

More on Conditionals

  • Relational and conditional operators
  • More ways to use if/else constructs
  • Using Switch Statements
  • Using the NetBeans Debugger

More on Arrays and Loops

  • Working with Dates
  • Parsing the args Array
  • Two-dimensional Arrays
  • Alternate Looping Constructs
  • Nesting Loops
  • The ArrayList class

Using Inheritance

  • Overview of inheritance
  • Working with subclasses and superclasses
  • Overriding methods in the superclass
  • Introducing polymorphism
  • Creating and extending abstract classes

Using Interfaces

  • Polymorphism in the JDK foundation classes
  • Using Interfaces
  • Using the List Interface
  • Introducing Lambda expressions

Handling Exceptions

  • Handling Exceptions: An overview
  • Propagation of exceptions
  • Catching and throwing exceptions
  • Handling multiple exceptions and errors

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