Create New Posts in Wordpress using Java and XMLRpc

WordpressXMLRpcClient.java

import org.apache.xmlrpc.XmlRpcException;
import org.apache.xmlrpc.client.XmlRpcClient;
import org.apache.xmlrpc.client.XmlRpcClientConfigImpl;

	@SuppressWarnings({ "unchecked", "rawtypes" })
	@Override
        /**
         *  Create New Posts in Wordpress using Java
         * 
         *    //http://codex.wordpress.org/XML-RPC_WordPress_API/Posts#wp.newPost
	 *    //http://codex.wordpress.org/Function_Reference/wp_insert_post
         */ 
	public void publishToWordpress(Item item) throws Exception {
	    try {
	      
	      XmlRpcClientConfigImpl config = new XmlRpcClientConfigImpl();
	      config.setBasicPassword("your_password");
	      config.setBasicUserName("your_user");
	      config.setEnabledForExtensions(true);
	      config.setEnabledForExceptions(true);

	      XmlRpcClient client = new XmlRpcClient();
	      client.setConfig(config);
	      
	      Hashtable post = new Hashtable();
	      post.put("post_title", item.getTitle());
	      post.put("post_content", item.getDescription());
	      post.put("post_status", "publish");
	      post.put("post_date", item.getPubDate());
	      post.put("comment_status", "open");
	      post.put("ping_status", "open");
	      
	      Hashtable taxonomies = new Hashtable();
	      
	      List<String> categories = new ArrayList<String>();
	      Set<ItemTheme> themes = item.getItemThemes();
	      for (Iterator iterator = themes.iterator(); iterator.hasNext();) {
			ItemTheme itemTheme = (ItemTheme) iterator.next();
			Theme theme = itemTheme.getTheme();
			categories.add(theme.getTitle());
	      }
	      
	      //custom taxonomies...
	      List<String> tags = new ArrayList<String>();
	      List<String> persons = new ArrayList<String>();
	      List<String> places = new ArrayList<String>();
	      List<String> events = new ArrayList<String>();
	      List<String> organizations = new ArrayList<String>();
	      List<String> source = new ArrayList<String>();		      
	      //..add keywords to your taxonomies...
	      for (Iterator iterator = themes.iterator(); iterator.hasNext();) {
			String theme = (String) iterator.next();
			categories.add(theme);
	      }
	       
	      	      
	      taxonomies.put("category", categories);
	      taxonomies.put("post_tag", tags);
	      taxonomies.put("person", persons);
	      taxonomies.put("place", places);
	      taxonomies.put("event", events);
	      taxonomies.put("organization", organizations);
	      
	      //custom fields....	      
	      List<Hashtable> customFieldsList = new ArrayList<Hashtable>();
	      Hashtable customFields = new Hashtable();
	
    	      customFields.put("key", "url");
	      customFields.put("value", myLink);
	      customFieldsList.add(customFields);  

	      customFields = new Hashtable();
	      customFields.put("key", "twitter_image");
	      customFields.put("value", linkImage);
	      customFieldsList.add(customFields);
	      	      
	      post.put("custom_fields", customFieldsList);
	      post.put("terms_names", taxonomies);
	      
	      Vector params = new Vector();
	      params.addElement(new Integer(0));
	      params.addElement(Constants.WORDPRESS_USER);
	      params.addElement(Constants.WORDPRESS_PWD);
	      
              //create a new post...	
	      if(isNew){
    		  params.addElement(post);
    		  log.debug("inserting post...");
    		  //log.debug("params:" + params);
    		  String postId = (String) client.execute("wp.newPost", params);
    	     }else{
		  //EDIT an existing post
    		  params.addElement("postId");
    		  params.addElement(post);
    		  client.execute("wp.editPost", params);
    	      }
	      
	   }catch (XmlRpcException e){
	    	  log.error(e.getMessage(), e);
	   }
     }

How can i post the image in the blog?