Java ConcurrentHashMap and for each loop

Question

Supposed I have the following ConcurrentHashMap:

ConcurrentHashMap identificationDocuments = new ConcurrentHashMap

        

Answer 1

I don't know If you are really asking this, but to iterate over any map you iterate over the keySet()

StringBuffer result = new StringBuffer("");

for(Integer i: indentificationDocuments.keySet()){
        result.append(indentificationDocuments.get(i));
}

return result.toString();