FirstTask

FirstTask

1. JAVA OBJECT

   • Company
     • Employees
       • Tax
       • Age
       • Salary
   • Attributes
     • Fields
   • Actions
     • Method

2. Java Classes

   • Class name
   • Fields
     • Age
     • Salary
   • Methods
     • returnType methodName (listOfArguments)
       • int negate(int number)
       • int add (int a, int b)
     • Void: no return
     • Main
       • public static main void (String [] args)
       • java className arg 1, arg 2...
       • java Test 1 safeMode
   • class className { [class body] }
   • Constructors
     • constructorName (listOfArguments) { [constructor body] }
     • initialize the fields

3. Creating Objects

   • instance/instantiate
   • new is always followed by the constructor
     • new employee ();
   • objectReference.method/fields Name
     • null: when there is no value
       • == operator to test