Final Exam: Apprentice Developer

WHAT YOU WILL LEARN

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  appropriately override the .toString method provided by the Object base class
  

  combine multiple independent catch blocks using the | operator
  

  copy a character file as a sequence of characters using the FileReader and FileReader classes
  

  correctly chain constructors to achieve code reuse
  

  correctly initialize objects of inner classes
  

  correctly initialize objects of static nested classes
  

  correctly invoke a method that throws an exception of a checked exception type
  

  correctly use the throws clause while defining method signatures
  

  create a custom exception object by extending the base class Exception, and throw an instance of this exception from your code
  

  create and use enums (enumerated data types) in Java
  

  create files using both the legacy java.io as well as the modern java.nio namespaces
  

  create String objects using different input arguments and forms of memory allocation
  

  create wrapper objects such as Integer, Float, etc. to encapsulate primitive (non-object) data types
  

  customize IntelliJ to incorporate your individual preferences
  

  define and invoke a parameterized constructor to instantiate objects of a class
  

  define and invoke constructors in classes to correctly initialize member variables
  

  define and invoke getter and setter methods to access private member variables of a class from outside that class
  

  define and invoke multiple constructors to instantiate objects of a class
  

  describe and use the -=, *=, %= and %= self-assignment operators
  

  differentiate between equality tests based on the == operator and .equals
  

  enumerate differences between checked exceptions, runtime exceptions, and errors
  

  enumerate the important built-in exception classes in Java
  

  identify differences between primitive and object types in Java
  

  identify the situations when divide-by-zero exceptions arise
  

  identify use-cases for the unary increment and decrement operators
  

  implement the Serializable interface in user-defined classes so that they can be written to and read from using ObjectOutputStream and ObjectInputStream object
  

  install Java on a Unix or Mac system
  

  install the Eclipse IDE on a Mac-based system
  

  invoke static and non-static methods of a class
  

  list the reasons for Java’s popularity
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  make use of method overloading in your programs
  

  modify control flow in a program using the if construct
  

  perform conversions between variables of primitive types
  

  perform operations such as copying and creating directories using the Files class in the java.nio namespace
  

  perform operations such as copying files, checking for their existence, and deleting files using the Files class in the java.nio namespace
  

  prematurely terminate loop execution using the break keyword
  

  read a byte stream using the InputStream and FileInputStream classes
  

  recognize how exceptions such as NullPointerException, NumberFormatException, and IndexOutOfBoundsException occur in code
  

  recognize how variables of primitive types are governed by pass-by-value semantics in Java
  

  recognize how variables of reference types are governed by pass-by-reference semantics in Java
  

  recognize Java's class hierarchy for byte and character streams
  

  recognize the exact semantics and limitations of the finally block
  

  recognize the precise semantics of the try-with-resources construct in Java
  

  recognize what member variables, static member variables, and member functions are
  

  short-circuit execution of the current loop iteration using the continue keyword
  

  throw an object of a built-in exception type in order to respond to an unexpected situation in a program
  

  use enums (enumerated types) along with switch statements
  

  use for loops to iteratively execute a block of code
  

  use multiple independent catch blocks with a single try block
  

  use nested if-else conditions to deal with mutually exclusive conditions
  

  use strings in if-else constructs, relying on the .equals method and avoiding the == operator
  

  use string variables in switch statements
  

  use the DataOutputStream class to write primitive types and strings to byte streams
  

  use the do-while loop control structure to ensure that the body of a loop is always executed at least once, regardless of the value of the loop variable
  

  use the logical AND, logical OR, and logical negation operators
  

  use the ObjectOutputStream class to write objects of any type to byte streams
  

  use the StringBuffer object to perform string operations
  

  use while loops to control the number of times a block of code executes based on the value of a specific expression
  

  utilize both single-line as well as multi-line comments in Java
  

  work with variables of double, char, and String types in Java