Java Final

• Greater than comparison operator:


  >
• Less than comparison operator:

  <
• Greater than or equal to comparison operator


  >=
• Less than or equal to comparison operator:

  <=
• Boolean operator for AND:


  &&
• Boolean operator for OR:


  ||
• Boolean operator for NOT:


  !
• what is the increment operator?


  x++;
• what is the decrement operator?

  x--;
• what is the += arithmetic operator equivalent to?


  a = a +2
• what is the -= arithmetic operator equivalent to?

  b = b -3
• what is the *= operator equivalent to?


  a = a * 3
• what is the /= arithmetic operator equivalent to?


  b = b/2
• what is the %= arithmetic operator equivalent to?

  a = a % 5
• how do you declare and initialize a variable?

  int numberOfStudents = 50;
• how do you declare a constant?

  final int MAX_STUDENTS = 100;
• how do you write a JAVA statement to create an object?

  MyClass myObject = new MyClass(argument1, argument2);
• define the purpose of a constructor

  initialize objects of a class
• how do you write a constructor

  public MyClass(int initialValue)
• what is the relationship between a class and an object?

  a class is a template for creating an object, an object is an instance of a class.
• what is a public visibility modifier?

  accessible from anywhere
• what is a private visibility modifier?


  accessible only from the same class
• what is a protected visibility modifier?


  accessible within the same package and by subclasses (regardless of the package)
• what is a no modifier visibility modifier?

  accessible only within the same package
• what is a STATIC method?


  associated with the class itself, rather than with any specific instance (object) of the class
• what is a NON STATIC method? 


  also known as instance methods, are associated with individual instances (objects) of the class
• what is the purpose and use of INHERITANCE?


  a fundamental concept in object-oriented programming, allowing a class to inherit properties and behaviors from another class
• what is a SUPER CLASS?

  a class that is being inherited from
• what is a SUB CLASS?

  a class that inherits from a superclass
• what is an EXTENDS label in a class header?


  used to establish an inheritance relationship between classes. It indicates that the class is a subclass
• how do you write a JAVA statement to declare, create, and use a STRING object?


  String myString = "Hello, World!"
• how do you write a JAVA statement to declare, create, and use a STRING BUFFER object?


  StringBuffer myStringBuffer = new StringBuffer("Hello, World!")
• what is a scanner class?


  used to read input from various sources such as the keyboard, files, or strings
• what is a PrintWriter class?


  used to write formatted text to output streams such as files or the console
• what is a File class?


  used to represent a file or directory path in the file system.
• what is array reference?


  when you declare an array variable, such as 'int[] numbers;', memory is allocated to store the reference to the array
• what is an array element?


  when you create the array using the 'new' keyboard, memory is allocated to store the actual elements if the array
• how do you output a PRINT statement?


  System.out.print("Hello, World!");
• how do you output a PRINTLN statement?

  System.out.println("\nWelcome to Java!");
• how do you output a PRINTF statement?

  System.out.printf(num 1: %d, num 2: %.2f%n", num 1, num 2);