Java Reference
In-Depth Information
// Create three Callable objects and register them
Callable c1 = cbt.generateCallable(1);
cbt.register(c1);
Callable c2 = cbt.generateCallable(2);
cbt.register(c2);
Callable c3 = cbt.generateCallable(3);
cbt.register(c3);
// Callback all the registered Callable objects
cbt.callback();
}
private void callback() {
int count = this.callableList.size();
// Callback all the registered Callable objects
for(int i = 0; i < count ; i++) {
Callable c = this.callableList.get(i);
c.call();
}
}
public void register(Callable c) {
this.callableList.add(c);
}
public Callable generateCallable(int no) {
// Note that this object is created here, but it's call() method is
// used later. It is also capturing the method parameter no which
// will be used in printing a message later.
Callable c = new Callable() {
public void call() {
System.out.println("Called #" + no);
}
};
return c;
}
}
Called #1
Called #2
Called #3
