code: public void setHttpProxy(String httpProxy) {
  		this.httpProxy = httpProxy;
  		
  		if (httpProxy == null) {
  //			throw new IllegalArgumentException("'httpProxy' cannot be null");
  			return;
  		}
  		
  		String[] tokens = httpProxy.split(":");
  		int count = tokens.length; 
  		if (count == 1) {
  			System.setProperty("http.proxyHost", tokens[0]);
  		} else if (count == 2) {
  			System.setProperty("http.proxyHost", tokens[0]);
  			System.setProperty("http.proxyPort", tokens[1]);
  		}		
  	}
docs: Format: 192.168.16.1:128
  
  @param httpProxy