// Lang_18 ['this' keyword].nova


// The application class.
class ThisKeywordApp
{
   // Application class's "main" function.
   public static void main( String[] args )
   {
      // Create a new "ThisKeyword" object.
      ThisKeyword t = new ThisKeyword( );

      // Output the Integer object in the "ThisKeyword" object.
      Stream.writeLine( "t = " + Integer.toString( t.getObject( ).i ) );

      // This "this" statement should produce an error.
      // "this" keywords are only allowed in instance methods (not static methods).
      // Uncomment this line to produce the error.
//      this;
   }
}


class ThisKeyword
{
   // Instance attribute.
   public int i;


   // Class constructor.
   public ThisKeyword( )
   {
      // Initialize the "i" attribute using the optional "this" keyword.
      this.i = 2003;

      // Output the value of "i".
      Stream.writeLine( "ThisKeyword.ThisKeyword( ) " + Integer.toString( this.i ) );

      // Call the "call" method using the optional "this" keyword.
      this.call( );

      // This "this" statement should produce an error.
      // You can't assign an object directly to the keyword.
//      this = new Test( );
   }


   // Instance method.
   public void call( )
   {
      Stream.writeLine( "ThisKeyword.call( ) method called." );
   }


   // Method to return a reference to the main object.
   public ThisKeyword getObject( )
   {
      return this;
   }
}