Try this( change proxyPort and proxyHost )
import sun.misc.BASE64Encoder;
System.getProperties().put("proxySet","true");
System.getProperties().put("proxyHost",proxyHost);
System.getProperties().put("proxyPort",proxyPort);
String proxyAuthentication = "username

assword";
String encodedPassword = "Basic " + new BASE64Encoder().encode(proxyAuthentication.getBytes());
URL url = new URL(someurl);
URLConnection conn = url.openConnection();
conn.setRequestProperty("Proxy-Authorization",encodedPassword);
I am new to
Java but this works for java 1.3.0_02
Check out Javaworld.com tip #42
cheers,
brian