You are absolutely correct Juergen , I should read the code
more carefully. However if the method where not static
then the use "this." would still be redundant.
Juergen Kreileder wrote:
> >>>>> Christopher Hinds writes:
>
> Christopher> [1 <multipart/alternative>]
> Christopher> [1.1 <text/plain; us-ascii (7bit)>]
> Christopher> The use of "this" is just plain redundant since
> Christopher> Cliente.class is by default derived from
> Christopher> "java.lang.Object" it is not nessassary to append
> Christopher> "this." to wait() or notify() or any other of the
> Christopher> monitor metheds in this case. Hint : take a look at
> Christopher> the core API class hierarchy.
>
> The use of 'this' is neither redundant nor allowed here -- the
> methods (recibirPeticion() and enviarPeticion()) are static and
> there is no 'this' in class methods. A 'synchronized static' method
> synchronizes on the class object.
>
> // in this example sm1 & sm2 are equivalent and so are m1 & m2
> class C
> {
> synchronized static void sm1() {}
> static void sm2() { synchronized(C.class) {}}
>
> static void m1() {}
> void m2() { synchronized(this) {}}
> }
>
> You will get compile time errors both for wait() and this.wait() in
> static methods. this.waits() fails because there is no this.
> wait() fails unless your class has a static method named wait()
> [Note: there is no such thing as inheritence for static methods in Java].
>
> The orignal author has several possiblities to fix his code, one
> would be to use an explicit lock object , e.g.:
>
> class C
> {
> static Object lock = new Object();
>
> static void m()
> {
> synchronized (lock) {
> lock.wait();
> }
> }
>
> static void n()
> {
> synchronized (lock) {
> lock.notifyAll();
> }
> }
> }
>
> Juergen
>
> --
> Juergen Kreileder, Universitaet Dortmund, Lehrstuhl Informatik V
> Baroper Strasse 301, D-44221 Dortmund, Germany
> Phone: ++49 231/755-5806, Fax: ++49 231/755-5802
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