Hello i want create gui for aria2c( internet download manager ) with java for doing this aria2c has built in xmlrpc. i use xmlRpc to create gui for aria2c. in aria2c support site there is a example code for python programming language that uses xmlrpc
Java Code:
>>> import xmlrpclib
>>> s = xmlrpclib.ServerProxy('http://localhost:6800/rpc')
>>> s.aria2.addUri(['http://example.org/file'])
'1'
i write this java code for doing this in java
Java Code:
package Aria2c;

import java.net.MalformedURLException;
import org.apache.xmlrpc.XmlRpcException;
import org.apache.xmlrpc.client.XmlRpcClientConfigImpl;
import java.net.URL;
import org.apache.xmlrpc.client.XmlRpcClient;
import java.util.Vector;

public class JavaClient{
	
	private static Vector< String > params;
	public JavaClient( )
	{
		params.add("http://rs230dt.rapidshare.com/files/344243800/10012723.LinuxCBT.Debian.part8.rar");
	}
    	public static void main( String[] args )
    	{
    		XmlRpcClientConfigImpl config = new XmlRpcClientConfigImpl();
    		try {
				config.setServerURL(new URL("http://localhost:6800/rpc"));
			} catch (MalformedURLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
    		XmlRpcClient client = new XmlRpcClient();
    		client.setConfig(config);
    		   		
    		try {
				client.execute("aria2.addUri", params );
			} catch (XmlRpcException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
			}

    }
}
but when i want compile this i have these exceptions
Java Code:
org.apache.xmlrpc.XmlRpcException: Failed to read server's response: Connection refused
	at org.apache.xmlrpc.client.XmlRpcStreamTransport.sendRequest(XmlRpcStreamTransport.java:161)
	at org.apache.xmlrpc.client.XmlRpcHttpTransport.sendRequest(XmlRpcHttpTransport.java:143)
	at org.apache.xmlrpc.client.XmlRpcSunHttpTransport.sendRequest(XmlRpcSunHttpTransport.java:69)
	at org.apache.xmlrpc.client.XmlRpcClientWorker.execute(XmlRpcClientWorker.java:56)
	at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:167)
	at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:158)
	at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:147)
	at Aria2c.JavaClient.main(JavaClient.java:30)
Caused by: java.net.ConnectException: Connection refused
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:310)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:176)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:163)
	at java.net.Socket.connect(Socket.java:546)
	at java.net.Socket.connect(Socket.java:495)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:174)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:409)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:530)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:240)
	at sun.net.www.http.HttpClient.New(HttpClient.java:321)
	at sun.net.www.http.HttpClient.New(HttpClient.java:338)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:814)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:755)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:680)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:858)
	at org.apache.xmlrpc.client.XmlRpcSunHttpTransport.writeRequest(XmlRpcSunHttpTransport.java:104)
	at org.apache.xmlrpc.client.XmlRpcStreamTransport.sendRequest(XmlRpcStreamTransport.java:151)
	... 7 more
Caused by:
java.net.ConnectException: Connection refused
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:310)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:176)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:163)
	at java.net.Socket.connect(Socket.java:546)
	at java.net.Socket.connect(Socket.java:495)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:174)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:409)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:530)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:240)
	at sun.net.www.http.HttpClient.New(HttpClient.java:321)
	at sun.net.www.http.HttpClient.New(HttpClient.java:338)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:814)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:755)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:680)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:858)
	at org.apache.xmlrpc.client.XmlRpcSunHttpTransport.writeRequest(XmlRpcSunHttpTransport.java:104)
	at org.apache.xmlrpc.client.XmlRpcStreamTransport.sendRequest(XmlRpcStreamTransport.java:151)
	at org.apache.xmlrpc.client.XmlRpcHttpTransport.sendRequest(XmlRpcHttpTransport.java:143)
	at org.apache.xmlrpc.client.XmlRpcSunHttpTransport.sendRequest(XmlRpcSunHttpTransport.java:69)
	at org.apache.xmlrpc.client.XmlRpcClientWorker.execute(XmlRpcClientWorker.java:56)
	at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:167)
	at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:158)
	at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:147)
	at Aria2c.JavaClient.main(JavaClient.java:30)
how i can improve this cod?
please help me