/**
 * Title:        
StaticClassRamUsage
 * Description:  Test of when a static class is instantiated
 * and when it is garbage collected

 * Copyright:    Copyright (c) Al Alexander

 * Company:      

 * @author Al Alexander
 * @version 1.0
 */

public class Main
{

  static
  {
    System.err.println( "in static initializer in Main..." );
    System.err.println( "  free memory: " + Runtime.getRuntime().freeMemory() );
  }

  public Main()
  {
    System.err.println( "just entered Main(), about to create a SecondClass object" );
    System.err.println( "  free memory: " + Runtime.getRuntime().freeMemory() );
    SecondClass sc = new SecondClass();
    sc = null;
    System.err.println( "now leaving Main() ..." );
  }

  public static void main(String[] args)
  {
    System.err.println( "just started in Main.main()" );
    System.gc();
    System.err.println( "  in Main.main(), free memory: " + Runtime.getRuntime().freeMemory() );
    Main main1 = new Main();
    System.err.println( "in Main.main(), calling garbage collector" );
    System.gc();
    System.err.println( "  free memory: " + Runtime.getRuntime().freeMemory() );
    System.err.println( "entering for loop in Main.main()" );
    for (int i=0; i<10; i++)
    {
      System.err.print( "zzz ..." );
      try { Thread.sleep(500); } catch (Exception e) {}
    }
    System.err.print( "\n" );
    System.err.println( "free memory: " + Runtime.getRuntime().freeMemory() );
    System.err.println("this is the last line of Main.main(), program is over");
  }
}