Szkolenie Preparation for the Oracle Certified Java Programmer Exam

1. Java Introduction , Variables and Primitive Data types

• Features of Java
• Java SE, Java EE, Java ME editions
• Writing the first HelloWorld Java program
• Compiling and Executing a java program 
• Comments in Java
• Legal identifiers for variable names
• Primitive data types in Java
• Implicit conversions of primitive types
• Explicit conversions: Casting of primitive types

2. Operators

• Understanding operators and operands
• Assignment operators
• Arithmetic operators
• Relational operators
• Logical operators
• Advanced operators: new , cast, shortcut if-else

3. Flow Control , Arrays and Enum

• Selection statements
  • The if statement
  • Switch statement
• Enumerations : using enum in a switch statement
• Iteration statements
  • while
  • do-while
  • for loop
  • for-each loop
• Arrays
  • Single dimensional
  • Two dimensional
• Block breaker statements
  • Simple and labeled continue
  • Simple and labeled break

4. Object Oriented programming - part 1

•  Reference Variables
•  Methods - With and without arguments , with variable length argument list ,  different return types
•  Accepting command line arguments
•  The this keyword
•  Java Beans conventions
•  Constructors
  • Default constructors and situations when they will be created
  • Declaring more than one constructor for a class 

5. Object Oriented programming - part 2

• Static variables and  Instance variables
• Static methods and instance methods
• Method overloading
• Inheritance - Superclass ,  Subclass
• The super keyword -  Using super in constructors ,  Using super in methods

6.  Object Oriented programming - part 3

• Method Overriding -  Rules for method overriding,   covariant return types
• The final keyword
• Understanding Polymorphism
• Abstract methods, Abstract classes
• Interfaces -  Interface basics,  Interfaces that extend one or more interfaces, Classes that implement interfaces

7. Object Oriented programming - part 4

• Usage modifiers  : abstract, static, native, transient
• Package and import statements
• Static imports
• Access Modifiers : public, protected, default, private
• Nested Classes

8. Strings and Exception Handling

   Strings in Java

• The java.lang.String
• The java.lang.StringBuffer
• The java.lang,StringBuilder

   Exception Handling

• Runtime Exceptions
• Checked Exceptions
• Using Try, catch, finally
• Throwing Exceptions
• Declaring exceptions in a throws clause
• Common Exceptions
• Assertions 

9. Wrappers  and Autoboxing

• Using primitive wrapper classes - Boolean, Character, Byte, Short, Integer, Long, Float, Double
• Autoboxing and Auto-unboxing

10. Collections interfaces, implementations and algorithms

•  Collection and Map super interfaces - List interface, Set interface, Map interface
•  Collection implementations  -ArrayList, Vector,LinkedList, HashSet, LinkedhashSet, HashTable, HashMap
•  Given a scenario, recognize which structure to use to store data

11. The Input-Output

• The File class
•  FileInputStream,  FileOutputStream
•  DataInputStream, DataOutputStream
•  FileReader, FileWriter
•  BufferedReader, BufferedWriter
•  ObjectInputStream, ObjectOutputStream
•  Serialization
•  Formatting - using Formatter and String class, Using formatting parameters %b %s %d %c  %f
• PrintStream - format/printf methods

12. Threads

• Using Thread class
• Using Runnable interface
•  Thread life cycle and transitions

13. Object class

• Methods in Object class
• Difference between equals method and == operator
• Overiding toString(), equals(..)  methods

14. Scanner

• Using java.util.Scanner