CS535 Object-Oriented Programming & Design
Fall Semester, 1996
Static & Initialization Order

Static & Initialization Order Slide # 1

import sdsu.io.Console;

class Test 
{
   public static void main( String args[] )
   {
   Console.println( "Start Main" );
   InitializationTest object;
   Console.println( "Before creating an object" );
   object = new InitializationTest();
   Console.println( "a " + object.a );
   Console.println( "b " + object.b );
   Console.println( "c " + object.c );
   Console.println( "d " + object.d );
   Console.println( "e " + object.e );
   Console.println( "f " + object.f );
   }
}

class StaticPrint
{   
   private static int count = 0;
   public static int print( String message )
   {
      Console.println( message + ",  \tvalue " + count);
      return count++;
   }
}
   

Static & Initialization Order Slide # 2

class InitializationTest
{
   public static int a = StaticPrint.print( "a declaration, static" );
   public int b = StaticPrint.print( "b declaration, non static" );
   
   static
   {
      a = StaticPrint.print( "a in static block" );
   }
   
   public static int c =  StaticPrint.print( "c declaration, static" );
   public int d = StaticPrint.print( "d declaration, non static" );
   
   public InitializationTest()
   {
      b = StaticPrint.print( "b in constructor" );
      e = StaticPrint.print( "e in constructor" );
   }
   
   public int e = StaticPrint.print( "e declaration, non static" );
   public static int f =  StaticPrint.print( "f declaration, static" );
}

a    declaration,    static,     value 0
a    in static block,        value 1
c    declaration,    static,     value 2
f    declaration,    static,     value 3
b    declaration,    non static,     value 4
d    declaration,    non static,     value 5
e    declaration,    non static,     value 6
b    in constructor,        value 7
e    in constructor,        value 8
a 1
b 7
c 2
d 5
e 8
f 3

Static & Initialization Order Slide # 3

class ForwardReferenceAndInitialization
{
   public static int first = 1;

   public static int second =  first * 2;

   public static int third = fourth - 1;       // Compiler error

   public static int fourth = 4;

   public int fifth = 5;

   public int sixth = fifth + 1;

   public int seventh = eighth - 1;      // Compiler error

   public int eighth = 8;

}