Re: URL context constructor broken?

Roedy Green <>
Thu, 30 Dec 2010 14:29:50 -0800
On Thu, 30 Dec 2010 20:53:12 +0530, Abu Yahya <>
wrote, quoted or indirectly quoted someone who said :

Which version of the JDK are you using? (I tried this with Sun's 1.5,
and IBM's 1.6)

You can see this with


 URL originalURL = new URL( "xxxx" );
 String newLocation = "yyyy";
 String merged = new URL( originalURL, newLocation ).toString();
 out.println( originalURL + " " + newLocation + " " + merged );
 catch ( MalformedURLException e )

I am using 1.6.0_23 from Oracle.

It does lots of them correctly. If you are interested I could collect
a set of real world examples it does properly. I suspect one pattern
it does not handle correctly is: + /xxxx

It may also get inhibited if there is a ?xxx on either piece.

I read the RFC, looked the code, and studied the JavaDoc. Since there
are no examples, the matter of what SHOULD it do, still seems

For now, The best approach is to write a replacement that is quite
forgiving. Sometimes the goofs even forget the lead / on the
newlocation string. It makes no sense unless you presume one. Browsers
seem to sort this out.

Then I need to write a SSCCE that demonstrates each of the
non-functioning patterns in simplest form. I will leave it up to
Oracle to decide if they intended it to be broken for the purpose I am
trying to use it. It is the sort of bug that fixing might break
existing code.

Roedy Green Canadian Mind Products
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