Question

I want to convert a java string that contains UTF-8 characters to a format that a browser can use( the string will be used as URL )
What exactly I mean is that url.openStream() cannot open a webpage, when url contains Persian letters.

Answer 1

Java Strings do not contain UTF-8 characters. From the docs for Character:

The Java 2 platform uses the UTF-16 representation in char arrays and in the String and StringBuffer classes.

You can use the URLEncoder class to encode a string so that url.openStream() works.