// Fig. 8.13: EmployeeTest.java
// Test Employee class with static class variable,
// static class method, and dynamic memory.
import javax.swing.*;

public class EmployeeTest2 {

  public static void main( String args[] )
  {
    // prove that count is 0 before creating Employees
    String output = "Employees before instantiation: " +
                    Employee2.getCount();

    // create two Employees; count should be 2
    Employee2 e1 = new Employee2( "Susan", "Baker" );
    Employee2 e2 = new Employee2( "Bob", "Jones" );

    // prove that count is 2 after creating two Employees
    output += "\n\nEmployees after instantiation: " +
              "\nvia e1.getCount(): " + e1.getCount() +
              "\nvia e2.getCount(): " + e2.getCount() +
              "\nvia Employee.getCount(): " + Employee2.getCount();

    // get names of Employees
    output += "\n\nEmployee 1: " + e1.getFirstName() +
              " " + e1.getLastName() + "\nEmployee 2: " +
              e2.getFirstName() + " " + e2.getLastName();

    // decrement reference count for each Employee object; in this
    // example, there is only one reference to each Employee, so these
    // statements mark each Employee object for garbage collection
    e1 = null;
    e2 = null;

    System.gc(); // suggest call to garbage collector

    // show Employee count after calling garbage collector; count
    // displayed may be 0, 1 or 2 based on whether garbage collector
    // executes immediately and number of Employee objects collected
    output += "\n\nEmployees after System.gc(): " +
              Employee2.getCount();

    JOptionPane.showMessageDialog( null, output,
                                   "Static Members",
                                   JOptionPane.INFORMATION_MESSAGE );

    System.exit( 0 );
  }

} // end class EmployeeTest