public void onLoad(CoapResponse coapResponse) { String payloadString = coapResponse.advanced().getPayloadString(); String source1 = coapResponse.advanced().getSource().getCanonicalHostName(); String source2 = coapResponse.advanced().getSource().getHostName(); String source3 = coapResponse.advanced().getSource().getHostAddress(); System.out.print( "Observable Response: " + payloadString + ", Source 1: " + source1 + ", Source 2: " + source2 + ", Source3: " + source3 + "\n"); }