this() and super()

[T George]

Hello all,

I have been roaming around in here for quite some time and it is always very helpful. However this is my first post.
Now straight to business

I know(i think in know) that you can't put super() in a constructor if you have put the this() in the constructor but is it possible to put this() after a super() in a constructor.
In other words does this() also has to be on the first line in the constructor?

Thank you in advance
Thomas

[Cm Ananth]

Yes.. this() and super() needs to be the first statement..

[Jeanne Boyarsky]

Thomas,
Yes. Since the constructor creates an object, only one may be called. If you want to call both this() and super(), you can have the other constructor do so for you. A common technique is:

public class A {
  public A() {
    this("default");
  }
  public A(String param) {
    super();
    // do stuff
  }
}

[Jeanne Boyarsky]

And welcome to JavaRanch!

[T George]

Thank you Ananth and Jeanne for the help.
Appreciate it