Building Absolute/Relative URIs

This tip show you how to build absolute/relative URIs by using the java.net.URI methods.

Building an absolute URI:


try{
   URI uri_absolute=new URI("http://www.java.sun.com/");
   URI uri_relative=new URI("index.html");
   URI uri_absolute_result=uri_absolute.resolve(uri_relative);
   System.out.println(uri_absolute_result);
   }catch(URISyntaxException e)         
      {System.out.println(e.getMessage());}

The result:


http://www.java.sun.com/index.html

Building a relative URI:


try{
   URI uri=new URI("/docs/imagini/mare/");
   URI uri_relative=new URI("eforie/discoteca.jpg");       
   URI uri_relative_result=uri.resolve(uri_relative);
   System.out.println(uri_relative_result);
   }catch(URISyntaxException e)         
      {System.out.println(e.getMessage());}

The result:


/docs/imagini/mare/eforie/discoteca.jpg

Building an absolute URI:


try{
   URI uri_absolute=new URI("http://www.java.sun.com/");          
   URI uri_absolute_result=uri_absolute.resolve("index.html");
   System.out.println(uri_absolute_result);         
   }catch(URISyntaxException e)         
     {System.out.println(e.getMessage());}

The result:


http://www.java.sun.com/index.html

Building a relative URI:


try{
   URI uri=new URI("/docs/imagini/mare/");          
   URI uri_relative_result=uri.resolve("eforie/discoteca.jpg");
   System.out.println(uri_relative_result);
   }catch(URISyntaxException e)         
      {System.out.println(e.getMessage());}

The result:


/docs/imagini/mare/eforie/discoteca.jpg

Getting a relative URI:


try{
  URI uri_absolute_1=new URI("http://www.java.sun.com/index.html");
  URI uri_absolute_2=new URI("http://www.java.sun.com/");            
   URI uri_relative_result=uri_absolute_2.relativize(uri_absolute_1);
   System.out.println(uri_relative_result);         
   }catch(URISyntaxException e)         
      {System.out.println(e.getMessage());}

Result:


index.html

Leonard Anghel

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