how to convert object to string in java

I have a function that returns map value (String) as a generic Object. How do I convert it back to string. I tried toString() but all i get is end[Ljava.lang.String;@ff2413

public Object getParameterValue(String key)
{
    Iterator iterator=params.entrySet().iterator();

    while(iterator.hasNext())
    {
        Map.Entry me=(Map.Entry)iterator.next();
        String[] arr=(String[])me.getValue();
        log.info(me.getKey().toString()+"="+arr[0]);
    }
    if(params.containsKey(key))
    {
        log.info(key+"="+params.get(key));
        return params.get(key);
    }


    return null;
}

Receiving end

String temp=data.getParameterValue("request").toString();
log.info("end"+temp);

log.info(me.getKey().toString()+"="+arr[0]); give me an output

[email protected]
request=login
projectid=as