employeetest.java

《Java面向对象程序设计》例子源代码.轻松学习书本.

//EmployeeTest.java
import javax.swing.*;
public class EmployeeTest {
   public static void main( String args[] ){
      String output = "Employees before instantiation: " +
         Employee.getCount();
      Employee e1 = new Employee( "Susan", "Baker" );
      Employee e2 = new Employee( "Bob", "Jones" );
      output += "\n\nEmployees after instantiation: " +
         "\nvia e1.getCount(): " + e1.getCount() +
         "\nvia e2.getCount(): " + e2.getCount() +
         "\nvia Employee.getCount(): " + Employee.getCount();
      output += "\n\nEmployee 1: " + e1.getFirstName() +
         " " + e1.getLastName() + "\nEmployee 2: " + 
         e2.getFirstName() + " " + e2.getLastName();
      e1 = null; 
      e2 = null;  
      System.gc(); 					// 显式地运行垃圾收集程序
      output += "\n\nEmployees after System.gc(): " + 
         Employee.getCount();
      JOptionPane.showMessageDialog( null, output,
         "静态方法和域", JOptionPane.INFORMATION_MESSAGE );
      System.exit( 0 );
   }
}