Question

I get requestParameters Map from my app and assigning it to a different map with some changed values. Basically output I get is

email=[e-mail]
login
projectname=abc

I want to assign

email=[e-mail]
request=login
projectname=abc

So i did this

    tempKey=new String[requestParameters.size()];
    tempValue=new String[requestParameters.size()];
    requestParams=new HashMap();

    while(iterator.hasNext())
    {

        Map.Entry me=(Map.Entry)iterator.next();
        String[] arr=(String[])me.getValue();

        if(me.getKey().toString().equalsIgnoreCase("login"))
        {
            tempKey[i]="request";
            tempValue[i]=me.getKey().toString();

        }
        else
        {
            tempValue[i]=arr[0];
            tempKey[i]=me.getKey().toString();
        }

        requestParams.put(tempKey[i], tempValue[i]);
        log.info(tempKey[i]+"="+tempValue[i]);
        i++;
    }

I try to print the values from requestParams like this, but i get nothing

iterator=requestParams.entrySet().iterator();
    while(iterator.hasNext())
    {

        Map.Entry me=(Map.Entry)iterator.next();
        String[] arr=(String[])me.getValue();
        log.info(me.getKey().toString()+"="+arr[0]);
    }

It correctly prints the log using tempKey[i]+"="+tempValue[i] but it does not assign values to requestParams (modified map), What is wrong in the above code?

Answer 1

I would copy the existing map and change the different values:

Map<String, String> newMap = new HashMap<String, String>(requestParameters);
newMap.put("request", "login");
newMap.remove("login");