Kafka consumer - want to print partition id along with message

Hi, 

I am trying to learn more on Kafka consuming patterns if we have partitions on the topic and testing few scenarios. I would like to print the message when the consumer consumes along with the partition id. How to get this done ? 

We have simple consumer code (high level) 

  public void run() { 
        ConsumerIterator<byte[], byte[]> it = m_stream.iterator(); 
        while (it.hasNext()) 
            System.out.println("Thread " + m_threadNumber + ": " + new String(it.next().message())); 
        System.out.println("Shutting down Thread: " + m_threadNumber); 
    } 

How to print the message as well as partition id ? 

Tried to assign it.next() to MessageandMetadata variable and printed partition id (which is declared as int). But while printing message() - it is declared as object in MessageandMetadata. Message is getting printed as junk data 

Tried this: 

MessageandMetadata msg; 
msg = it.next() 
System.out.println("Partition "+ msg.partition() + "Message data" + msg.message().tostring()); 

Here msg.message() is not printing string value.   
Can anyone help on this.

Kader .

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