How to set up proxy in JBDS?

Issue

• How to set up proxy in JBDS?
• I've set up a proxy in JBDS but I get the following exception.

java.net.UnknownHostException: devstudio.jboss.com: Name or service not known
    at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
    at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
    at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
    at java.net.InetAddress.getAllByName0(InetAddress.java:1246)
    at java.net.InetAddress.getAllByName(InetAddress.java:1162)
    at java.net.InetAddress.getAllByName(InetAddress.java:1098)

All other applications on my machine are working fine through this proxy and only JBoss Developer Studio is failing.