andyverma

Hi the following code of Khalid and Rassmussen is giving me compile time errors
can anybody solve this
interface IDrawable{ void draw(); } class Shapes implements IDrawable { public void draw() { System.out.println("Drawing a shape"); } }; class Painter { public Shapes createShape() { //This anonymous class extends Shapes, it is been //defined and instantiated at the same time //created in non static context return new Shapes() { public void draw() { System.out.println("Drawing a new shape"); } }; } public static IDrawable createIDrawable() { //This anonymous class implements IDrawable, created //in static context hence its is implicitly static return new IDrawable() { public void draw() { System.out.println("Drawing a new IDrawable"); } }; } }; public class Client { public static void main(String args[]) { IDrawable[] drawables = { new Painter.createShape(), Painter.createDrawable(), new Painter.createDrawable() }; drawables[0].draw(); drawables[1].draw(); drawables[2].draw(); System.out.println("Anonymous class names"); System.out.println(drawables[0].getClass()); System.out.println(drawables[1].getClass()); System.out.println(drawables[2].getClass()); } };
[ edited to format code with the [code] and [/code] UBB tags and to remove tabs -ds ]
[ June 19, 2002: Message edited by: Dirk Schreckmann ]

Originally posted by Richard Teston:
In the synchronize block syntax:
synchronized( ? )
{
// code to be synchronized
}
What is the "?".?
What is its significance to the block?

? is the object refernce,the monitor of this object refence has to be acquired by the thread who wishes to exceute the block of synchronized code.