41     static {
  42         String prefix = null;
  43         try {
  44             prefix = GetPropertyAction.privilegedGetProperty("impl.prefix");
  45             if (prefix != null)
  46                 prefixImplClass = Class.forName("java.net."+prefix+"DatagramSocketImpl");
  47         } catch (Exception e) {
  48             System.err.println("Can't find class: java.net." +
  49                                 prefix +
  50                                 "DatagramSocketImpl: check impl.prefix property");
  51             //prefixImplClass = null;
  52         }
  53     }
  54 
  55     /**
  56      * Creates a new <code>DatagramSocketImpl</code> instance.
  57      *
  58      * @param   isMulticast     true if this impl if for a MutlicastSocket
  59      * @return  a new instance of a <code>DatagramSocketImpl</code>.
  60      */

  61     static DatagramSocketImpl createDatagramSocketImpl(boolean isMulticast /*unused on unix*/)
  62         throws SocketException {
  63         if (prefixImplClass != null) {
  64             try {
  65                 @SuppressWarnings("deprecation")
  66                 DatagramSocketImpl result = (DatagramSocketImpl)prefixImplClass.newInstance();
  67                 return result;
  68             } catch (Exception e) {
  69                 throw new SocketException("can't instantiate DatagramSocketImpl");
  70             }
  71         } else {
  72             return new java.net.PlainDatagramSocketImpl(isMulticast);
  73         }
  74     }
  75 }

  41     static {
  42         String prefix = null;
  43         try {
  44             prefix = GetPropertyAction.privilegedGetProperty("impl.prefix");
  45             if (prefix != null)
  46                 prefixImplClass = Class.forName("java.net."+prefix+"DatagramSocketImpl");
  47         } catch (Exception e) {
  48             System.err.println("Can't find class: java.net." +
  49                                 prefix +
  50                                 "DatagramSocketImpl: check impl.prefix property");
  51             //prefixImplClass = null;
  52         }
  53     }
  54 
  55     /**
  56      * Creates a new <code>DatagramSocketImpl</code> instance.
  57      *
  58      * @param   isMulticast     true if this impl if for a MutlicastSocket
  59      * @return  a new instance of a <code>DatagramSocketImpl</code>.
  60      */
  61     @SuppressWarnings("deprecation")
  62     static DatagramSocketImpl createDatagramSocketImpl(boolean isMulticast /*unused on unix*/)
  63         throws SocketException {
  64         if (prefixImplClass != null) {
  65             try {

  66                 DatagramSocketImpl result = (DatagramSocketImpl)prefixImplClass.newInstance();
  67                 return result;
  68             } catch (Exception e) {
  69                 throw new SocketException("can't instantiate DatagramSocketImpl");
  70             }
  71         } else {
  72             return new java.net.PlainDatagramSocketImpl(isMulticast);
  73         }
  74     }
  75 }